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smsc ucs1001 revision 1.2 (05-21-12) datasheet datasheet product features ucs1001 usb port power controller with charger emulation general description the ucs1001 provides a usb port power switch for precise control of up to 2. 5 amperes continuous current with over-current limit (ocl), dynamic thermal management, latch or auto-recovery (low test current) fault handling, selectable active low or high enable, under- and over-voltage lockout, back-drive protection, and back-voltage protection. split supply support for vs and vdd is an option for low power in system standby states. this gives battery operated applications, like notebook pcs, the ability to detect attachments from a sleep or off state. after the attach detection is flagged, the system can decide to wake up and/or provide charging. in addition to power switching and current limiting modes, the ucs1001 will automatically charge a wide variety of portable devices, including usb-if bc1.2, yd/t-1591 (2009), most apple ? and rim ? , and many others. nine preloaded charger emulation profiles maximize compatibility coverage of peripheral devices. the ucs1001 is available in a 20-pin qfn 4 mm x 4 mm package. applications ? notebook and netbook computers ? tablets and e-book readers ? desktops and monitors ? docking stations and printers ? ac-dc wall adapters features ? port power switch with two current limit behaviors ? 2.9 v to 5.5 v source voltage range ? up to 2.5 a current with 55 m ? on resistance ? over-current trip or constant current limiting ? soft turn-on circuitry ? selectable current limit ? dynamic thermal management ? under- and over-voltage lockout ? back-drive, back-voltage protection ? latch or auto-recovery (low test current) fault handling ? selectable active high or low power switch enable ? bc1.2 vbus discharge port renegotiation function ? selectable / automatic cycling of usb data line charger emulation profiles ? usb-if bc1.2 charging downstream port (cdp) & dedicated charging port (dcp) modes, yd/t-1591, and most apple and rim protocols standard ? usb 2.0 compliant high-speed data switch (in pass- through and cdp modes) ? nine preloaded charger emulat ion profiles for maximum compatibility coverage of peripheral devices ? charging active (ucs1001-1) or attach detection (ucs1001-2) open-drain output ? fault alert open-drain output ? ultra low power sleep state ? optional split supply support for vbus and vdd for low power in system standby states ? wake on attach usb (ucs1001-2) ? wide operating temperature range: -40 c to +85 c ? iec61000-4-2 8 / 15 kv esd immunity ? ul recognized and en/iec 60950-1 (cb) certified
usb port power controller with charger emulation datasheet revision 1.2 (05-21-12) 2 smsc ucs1001 datasheet block diagram charger control, measurement, ocl interface, logic s0 latch chrg# (ucs1001-1 only) alert# power switch temp pwr_en dpout dmout dpin vdd vs vbus dmin gnd usb 2.0 hs data switch & charger emulator ilim attach detector m1 m2 sel em_en vdd vdd uvlo, ovlo a_det# (ucs1001-2 only)
usb port power controller with charger emulation datasheet smsc ucs1001 3 revision 1.2 (05-21-12) datasheet reel size is 4,000 pieces this product meets the halogen maximum concentration values per iec61249-2-21 for rohs compliance and environmen tal information, please visit www.smsc.com/rohs please contact your smsc sales representative for additi onal documentation related to this product such as application notes, anomaly sheets, and design guidelines. ordering number package features UCS1001-1-BP-TR 20 pin qfn 4 mm x 4 mm (lead free rohs compliant) usb port power controller with charger emulation and charging active output indicator ucs1001-2-bp-tr 20 pin qfn 4 mm x 4 mm (lead free rohs compliant) usb port power controller with charger emulation and portable device attachment detected output indicator copyright ? 2012 smsc or its subsidiaries. all rights reserved. circuit diagrams and other information relating to smsc product s are included as a means of illustrating typical applications. consequently, complete information sufficient for construction pur poses is not necessarily given. although the information has been checked and is bel ieved to be accurate, no responsibility is assumed for inaccuracies. smsc reserves t he right to make changes to specifications and product descriptio ns at any time without notice. contact your local smsc sales office to obtain the la test specifications before placing your product order. the provisi on of this information does not convey to the purchaser of the described semiconductor device s any licenses under any patent rights or other intellect ual property rights of smsc or others. all sales are expressly conditional on your agr eement to the terms and conditions of the most recently dated ve rsion of smsc's standard terms of sale agreement dated before the date of your order (the "terms of sale agreement"). the product may contain d esign defects or errors known as anomalies which may cause the product's functions to deviate from published specifications. anomaly sheets are available upon request. smsc products are not designed, intended, authorized or warranted for use in any life support or other application whe re product failure could cause or contribute to personal injury or severe property damage. any and all such uses without prior written approval of an officer of smsc and further testing and/or modification will be fully at the risk of the customer. copies of this document or other smsc litera ture, as well as the terms of sale agreement, may be obtained by visiting smsc?s website at http://www.smsc.com. smsc is a registered trademark of standar d microsystems corporation (?smsc?). product names and company names are the trademarks of their respective holders. smsc disclaims and excludes any and all warranties, includi ng without limitation any and all implied warranties of merchantability, fitness for a part icular purpose, title, and against infringement and the like, and any and all warranties arising from any course of dealing or us age of trade. in no event shall smsc be liable for any direct, incidental, indirect, special, punitive, or consequential damages; or for lost data, profits, savings or revenues of any kind; regardless of the form of action, whether based on contract; tort; negligence of smsc or others; strict liability; breach of warranty; or othe rwise; whether or not any re medy of buyer is held to have failed of its essential purpose, and whether or no t smsc has been advised of the possibility of such damages. ordering information:
usb port power controller with charger emulation datasheet revision 1.2 (05-21-12) 4 smsc ucs1001 datasheet table of contents chapter 1 terms and abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 chapter 2 pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 chapter 3 electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 4 3.1 esd & transient performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 3.1.1 human body model (hbm) performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 3.1.2 charged device model (cdm) performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 3.1.3 iec61000-4-2 performance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 chapter 4 general description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 4.1 ucs1001 power states. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 4.1.1 off state operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 4.1.2 sleep state operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 4.1.3 detect state operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 4.1.4 active state operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 4.1.5 error state operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 4.2 supply voltages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 4.2.1 vdd supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 4.2.2 vs source voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 4.2.3 back-voltage detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 4.2.4 back-drive current protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 4.2.5 under-voltage lockout on vs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 4.2.6 over-voltage detection and lockout on vs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 4.3 discrete input pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 4.3.1 ilim input. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 4.3.2 sel input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 4.3.3 m1, m2, and em_en inputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 4.3.4 pwr_en input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 4.3.5 latch input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 4.3.6 s0 input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 4.4 discrete output pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 4.4.1 alert#, chrg#, and a_det# output pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 4.4.2 interrupt blanking. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 chapter 5 usb high-speed data switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 5.1 usb high-speed data switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 5.1.1 usb-if high-speed compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 chapter 6 usb port power switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 6.1 usb port power switch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 6.2 current limiting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 6.2.1 current limit setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 6.2.2 short circuit output current limiting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 6.2.3 soft start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 6.2.4 current limiting modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 6.3 thermal management and voltage protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 6.3.1 thermal management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
usb port power controller with charger emulation datasheet smsc ucs1001 5 revision 1.2 (05-21-12) datasheet 6.4 vbus discharge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 6.5 fault handling mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 6.5.1 auto-recovery fault handlin g . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 6.5.2 latched fault handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 chapter 7 detect state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 7.1 device attach / removal dete ction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 7.2 vbus bypass switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 7.3 attach detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 7.4 removal dete ction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 chapter 8 active state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 8.1 active state overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 8.2 active mode selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 8.3 bc1.2 detection renegotiation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 8.4 data pass-through (no charger emulation) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 8.5 bc1.2 sdp (no charger emulation) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 8.6 bc1.2 cdp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 8.6.1 bc1.2 cdp charger emulation profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 8.7 bc1.2 dcp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 8.7.1 bc1.2 dcp charger emulation profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 8.8 dedicated charger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 8.8.1 emulation reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 8.8.2 emulation cycling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 8.8.3 dce cycle retry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 8.9 current limit mode associations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 8.10 preloaded charger emulation profiles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 8.10.1 bc1.2 dcp charger emulation pr ofile within dce cycle . . . . . . . . . . . . . . . . . . . . . . . . . 46 8.10.2 legacy 2 charger emulation profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 6 8.10.3 legacy 1, 3, 4, and 6 charger emulation profiles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 8.10.4 legacy 5 charger emulation profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 7 8.10.5 legacy 7 charger emulation profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 8 chapter 9 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 9.1 package markings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 chapter 10 typical operating curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 chapter 11 document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
usb port power controller with charger emulation datasheet revision 1.2 (05-21-12) 6 smsc ucs1001 datasheet list of figures figure 2.1 ucs1001-1 pin diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 figure 2.2 ucs1001-2 pin diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 figure 3.1 usb rise time / fall time measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 figure 3.2 description of dc terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 figure 4.1 ucs1001-1 system configuration (no charger emul ation) . . . . . . . . . . . . . . . . . . . . . . . . 23 figure 4.2 ucs1001-2 system configuration (no charger emul ation) . . . . . . . . . . . . . . . . . . . . . . . . 24 figure 4.3 ucs1001-1 system configuration (no usb hos t, with charger emulation) . . . . . . . . . . . 25 figure 4.4 ucs1001-2 system configuration (no usb hos t, with charger emulation) . . . . . . . . . . . 26 figure 4.5 wake timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 figure 6.1 trip current limiting operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 figure 6.2 constant current limiting (variable slope) operatio n . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 figure 9.1 ucs1001 package view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 figure 9.2 ucs1001 package dimensions and notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 figure 9.3 ucs1001 pcb layout notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 figure 9.4 recommended thermal landing solder paste patter n . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 figure 9.5 ucs1001 package markings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 figure 10.1 usb-if high-speed eye diagram (without data switch ) . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 figure 10.2 usb-if high-speed eye diagram (with data switch) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 figure 10.3 short applied after power up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 figure 10.4 power up into a short. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 figure 10.5 internal power switch short response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3 figure 10.6 vbus discharge behavior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 figure 10.7 data switch off isolation vs. fr equency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 figure 10.8 data switch ba ndwidth vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 figure 10.9 data switch on resistance vs. temp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 figure 10.10 power switch on resistance vs. temp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 figure 10.11 r dcp_res resistance vs.temp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 figure 10.12 power switch on / off time vs. temp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 figure 10.13 vs over-voltage threshold vs. temp. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 figure 10.14 vs under voltage threshold vs. temp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 5 figure 10.15 detect state vbus vs. ibus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 figure 10.16 trip current limit operation vs. temp. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 figure 10.17 ibus measurement accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 figure 10.18 active state current vs. temp. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 figure 10.19 detect state current vs. temp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 figure 10.20 sleep state current vs. temp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
usb port power controller with charger emulation datasheet smsc ucs1001 7 revision 1.2 (05-21-12) datasheet list of tables table 1.1 terms and abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 table 2.1 ucs1001 pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 table 2.2 pin types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 table 3.1 absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 table 3.2 power dissipation summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 table 3.3 electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 table 3.4 esd ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 table 4.1 power states control settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 table 6.1 ucs1001 ilim selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 table 8.1 active mode selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 table 8.2 current limit mode options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 table 11.1 customer revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
usb port power controller with charger emulation datasheet revision 1.2 (05-21-12) 8 smsc ucs1001 datasheet chapter 1 terms and abbreviations application note: the m1, m2, pwr_en, and em_en pins are referenced in text as the control. table 1.1 terms and abbreviations term / abbreviation description active mode active power state operation mode: data pass-through, bc1.2 sdp, bc1.2 cdp, bc1.2 dcp, or dedicated charger emulation cycle. attachment the physical insertion of a portable dev ice into a usb port that ucs1001 is controlling. cc constant current cdm charged device model. jedec model for char acterizing susceptibility of a device to damage from esd. cdp or usb-if bc1.2 cdp charging downstream port. the combinatio n of the ucs1001 cdp handshake and an active standard usb host comprises a cdp. this enables a bc1.2 compliant portable device to simultaneously draw current up to 1.5 a while data communication is active. the usb high-speed data switch is closed in this mode. charge enable when a charger emulation profile has been accepted by a portable device and charging commences. charger emulation profile representation of a charger comprised of dpout, dmout, and vbus signalling which make up a defined set of signat ures or handshaking protocols. connection usb-if term which refers to establishi ng active usb communications between a usb host and a usb device. current limiting mode determines the action that is perf ormed when the ibus current reaches the ilim threshold. trip opens the port power switch. constant current (variable slope) allows vbus to be dropped by the portable device. dce dedicated charger emulation. charger emul ation in which the ucs1001 can deliver power only. no active usb data communication is possible when charging in this mode. dcp or usb-if bc1.2 dcp dedicated charging port. this functions as a dedicated charger for a bc1.2 portable device. this allows the portable device to dr aw currents up to 1.5 a with constant current limiting (and beyond 1.5 a with trip current li miting). no usb communications are possible. dc dedicated charger. a charger which inherently does not have usb communications, such as an a/c wall adapter. disconnection usb-if term which refe rs to the loss of active usb communications between a usb host and a usb device. dynamic thermal management the ucs1001 automatically adjusts port power switch limits and modes to lower internal power dissipation when the thermal regula tion temperature value is approached. enumeration a usb-specific term that indicates that a host is detecting and identifying usb devices. handshake application of a charger emulation profile that r equires a response. two-way communication between the ucs1001 and the portable device. hbm human body model. hsw high-speed switch.
usb port power controller with charger emulation datasheet smsc ucs1001 9 revision 1.2 (05-21-12) datasheet i bus_r2min current limiter mode boundary. ilim the ibus current threshold used in current limiting. in trip mode, when ilim is reached, the port power switch is opened. in constant current mode, when the current exceeds ilim, operation continues at a reduc ed voltage and increased current; if vbus voltage drops below v bus_min , the port power switch is opened. legacy usb devices that require non-bc1.2 signatures be applied on the dpout and dmout pins to enable charging. ocl over-current limit. portable device usb device attached to the usb port. power thief a usb device that does not follow th e handshaking conventions of a bc1.2 device or legacy devices and draws current immediately upon receiving power (i.e., a usb book light, portable fan, etc). removal the physical removal of a portable device from a usb port that the ucs1001 is controlling. sdp or usb-if sdp standard downstream port. the co mbination of the ucs1001 high-speed switch being closed with an upstream usb host present comp rises a bc1.2 sdp. this enables a bc1.2 compliant portable device to simultaneously draw current up to 0.5 a while data communication is active. signature application of a charger emulation profile without wa iting for a response. one-way communication from the ucs1001 to the portable device. table 1.1 terms and abbreviations (continued) term / abbreviation description
usb port power controller with charger emulation datasheet revision 1.2 (05-21-12) 10 smsc ucs1001 datasheet chapter 2 pin description figure 2.1 ucs1001-1 pin diagram m2 1 2 3 4 6 7 8 9 em_en m1 5 10 15 14 13 12 20 19 18 17 pwr_en ilim vbus1 vbus2 vs2 vdd dpin s0 dpout sel dmout latch dmin alert# gnd vs1 11 16 chrg# gnd flag ucs1001-1 20-qfn 4mm x 4mm
usb port power controller with charger emulation datasheet smsc ucs1001 11 revision 1.2 (05-21-12) datasheet the pin types are described in table 2.2 . all pins are 5 v tolerant. figure 2.2 ucs1001-2 pin diagram table 2.1 ucs1001 pin description pin number pin name pin function pin type if pin not used connection 1 m1 active mode selector input #1 di connect to ground or vdd (see note 2.2 ) 2 m2 active mode selector input #2 di connect to ground or vdd (see note 2.2 ) 3 vbus1 voltage output from power switch. these pins must be tied together. hi-power, aio note 2.1 leave open 4 vbus2 5 ilim selects the maximum current limit at power-up (see table 6.1, "ucs1001 ilim selection" ) aio n/a 6 sel selects polarity of pwr_en control (see section 4.3.2, "sel input" ) di n/a m2 1 2 3 4 6 7 8 9 em_en m1 5 10 15 14 13 12 20 19 18 17 pwr_en ilim vbus1 vbus2 vs2 vdd dpin s0 dpout sel dmout latch dmin alert# gnd vs1 11 16 a_det# gnd flag ucs1001-2 20-qfn 4mm x 4mm
usb port power controller with charger emulation datasheet revision 1.2 (05-21-12) 12 smsc ucs1001 datasheet note 2.1 total leakage current from pins 3 and 4 (vbus) to ground must be less than 100 a for proper attach / removal detection operation. note 2.2 to ensure operation, the pwr_en pin must be enabled, as determined by the sel pin decode, when it is not driven by an external device. furthe rmore, one of the m1, m2, or em_en pins must be connected to vdd if all th ree are not driven from an external device. if the pwr_en is disabled or all of the m1 , m2, and em_en are connected to ground, the ucs1001 will remain in the sleep or detect state indefinitely. 7 vs1 voltage input to power switch. these pins must be tied together. hi-power, aio connect to ground 8 vs2 9 vdd main power supply input for chip functionality power n/a 10 pwr_en port power switch enable input. polarity determined by sel pin. di connect to ground or vdd (see note 2.2 ) 11 latch latch / auto-recovery fault handling mechanism selection input (see section 6.5, "fault handling mechanism" ) di n/a 12 s0 enables attach / removal detection feature (see section 4.3.6, "s0 input" ) di n/a 13 alert# active low error event output flag (requires pull-up resistor) od connect to ground 14 dpin usb data input (plus) aio connect to ground or ground through a resistor 15 dmin usb data input (minus) aio connect to ground or ground through a resistor 16 dmout usb data output (minus) aio connect to ground 17 dpout usb data output (plus) aio connect to ground 18 (ucs1001-1) chrg# active low ?charging active? output flag (requires pull-up resistor) od connect to ground 18 (ucs1001-2) a_det# active low attach detection output flag (requires pull-up resistor) od connect to ground 19 em_en active mode selector input di connect to ground or vdd (see note 2.2 ) 20 gnd ground power n/a bottom pad gnd flag thermal connection to ground plane thermal pad n/a table 2.1 ucs1001 pin description (continued) pin number pin name pin function pin type if pin not used connection
usb port power controller with charger emulation datasheet smsc ucs1001 13 revision 1.2 (05-21-12) datasheet table 2.2 pin types pin type description power this pin is used to supply power or ground to the device. hi-power this pin is a high current pin. aio analog input / output - this pin is used as an i/o for analog signals. di digital input - this pin is used as a digital input. od open-drain digital output - used as a digita l output. it is open-drain and requires a pull-up resistor.
usb port power controller with charger emulation datasheet revision 1.2 (05-21-12) 14 smsc ucs1001 datasheet chapter 3 electrical specifications note: stresses above those listed could cause perman ent damage to the ucs1001. this is a stress rating only and functional operation of the ucs1001 at any other condition above those indicated in the operation sections of this specification is not implied. note 3.1 a high k board uses a thermal via design with the thermal landing soldered to the pcb ground plane with 0.3 mm (12 mil) diameter vias in a 3x3 matrix (9 total) at 0.5 mm (20 mil) pitch. the board is multi-layer with 1-ounce internal power and ground planes and 2-ounce copper traces on top and bottom. a low k boar d is a two layer board without thermal via design with 2-ounce copper traces on the top and bottom. table 3.1 absolute maximum ratings voltage on vdd, vs, and vbus pins -0.3 to 6 v pullup voltage (v pullup ) -0.3 to vdd + 0.3 data switch current (i hsw _ on ), switch on 50 ma port power switch curr ent internally limited data switch pin voltage to ground (dpout, dpin, dmout, dmin); (vdd powered or unpowered) -0.3 to vdd + 0.3 v differential voltage across open data switch (dpout - dpin, dmout - dmin, dpin - dpout, dmin - dmout) vdd v voltage on any other pin to ground -0.3 to vdd + 0.3 v current on any other pin 10 ma package power dissipation see ta b l e 3 . 2 operating ambient temperature range -40 to 125 c storage temperature range -55 to 150 c table 3.2 power dissipation summary board pkg ? jc ? ja derating factor above 25 c ta < 25 c power rating ta = 70 c power rating ta = 85 c power rating high k (see note 3.1 ) 20-pin qfn 4 mm x 4 mm 6c / w 41 c / w 24.4 mw / c 2193 mw 1095 mw 729 mw low k (see note 3.1 ) 20-pin qfn 4 mm x 4 mm 6c / w 60 c / w 16.67 mw / c 1498 mw 748 mw 498 mw
usb port power controller with charger emulation datasheet smsc ucs1001 15 revision 1.2 (05-21-12) datasheet table 3.3 electrical specifications vdd = 4.5 v to 5.5 v, vs = 2.9 v to 5.5 v, v pullup = 3v to 5.5v, t a = -40 c to 85 c all typical values at vdd = vs = 5 v, t a = 27 c unless otherwise noted. characteristic symbol min typ max unit conditions power and interrupts - dc supply voltage vdd 4.5 5 5.5 v see note 3.2 source voltage vs 2.9 5 5.5 v see note 3.2 supply current in active (i dd_active + i vs_act ) i active 650 750 a average current ibus = 0 ma supply current in sleep (i dd_sleep + i vs_sleep ) i sleep 5 8 a average current v pullup < vdd supply current in detect (i dd_detect + i vs_detect ) i detect 185 220 a average current no portable device attached. power-on reset vs low threshold v s_uvlo 2.5 2.7 v vs voltage increasing vs low hysteresis v s_uvlo_hyst 100 mv vs voltage decreasing vdd low threshold v dd_th 4 4.4 v vdd voltage increasing vdd low hysteresis v dd_th_hyst 500 mv vdd voltage decreasing i/o pins - em_en, m1, m2, pwr_en, s0, latch, alert#, chrg# (ucs1001-1), a_det# (ucs1001-2) - dc parameters output low voltage v ol 0.4 v i sink_io = 8 ma alert#, chrg#, a_det# input high voltage v ih 2.0 v pwr_en, em_en, m1, m2, latch, s0 input low voltage v il 0.8 v pwr_en, em_en, m1, m2, em_en, latch, s0 leakage current i leak 5 a powered or unpowered v pullup <= vdd t a < 85 c interrupt pins - ac parameters alert#, a_det# (ucs1001-2) pin blanking time t blank 25 ms alert# pin interrupt masking time t mask 5ms
usb port power controller with charger emulation datasheet revision 1.2 (05-21-12) 16 smsc ucs1001 datasheet high-speed data switch high-speed data switch - dc parameters switch leakage current i hsw_off 0.5 a switch open - dpin to dpout, dmin to dmout, or all four pins to ground. vdd < vs. charger resistance r chg 2m ? dpout or dmout to vbus or ground, see figure 3.2 bc1.2 dcp charger emulation active on resistance r on_hsw 2 ? switch closed, vdd = 5 v test current = 8 ma, test voltage = 0.4 v, see figure 3.2 on resistance r on_hsw_1 5 ? switch closed, vdd = 5 v, test current = 8 ma, test voltage = 3.0 v, see figure 3.2 delta on resistance ? r on_hsw 0.3 ? switch closed, vdd = 5 v i tst = 8 ma, v tst = 0 to 1.5 v, see figure 3.2 high-speed data switch - ac parameters dp, dm capacitance to ground c hsw_on 4 pf switch closed vdd = 5 v dp, dm capacitance to ground c hsw_off 2 pf switch open vdd = 5 v turn off time t hsw_off 400 s time from state control (em_en, m1, m2) switch on to switch off, r term = 50 ? , c load = 5 pf turn on time t hsw_on 400 s time from state control (em_en, m1, m2) switch off to switch on, r term = 50 ? , c load = 5 pf propagation delay t pd 0.25 ns r term = 50 ? , c load = 5 pf propagation delay skew ? t pd 25 ps r term = 50 ? , c load = 5 pf rise/fall time t f/r 10 ns r term = 50 ? , c load = 5 pf dp - dm crosstalk x talk -40 db r term = 50 ? , c load = 5 pf off isolation o irr -30 db r term = 50 ? , c load = 5 pf f = 240 mhz table 3.3 electrical specifications (continued) vdd = 4.5 v to 5.5 v, vs = 2.9 v to 5.5 v, v pullup = 3v to 5.5v, t a = -40 c to 85 c all typical values at vdd = vs = 5 v, t a = 27 c unless otherwise noted. characteristic symbol min typ max unit conditions
usb port power controller with charger emulation datasheet smsc ucs1001 17 revision 1.2 (05-21-12) datasheet -3db bandwidth bw 1100 mhz r term = 50 ? , c load = 1.5 pf v dpout = v dmout = 350 mv dc total jitter t j 200 ps r term = 50 ? , c load = 5 pf, rise time = fall time = 500 ps at 480 mbps (prbs = 2 15 - 1) skew of opposite transitions of the same output t sk(p) 20 ps r term = 50 ? , c load = 5 pf port power switch port power switch - dc parameter over-voltage lockout v s_ov 6v on resistance r on_psw 55 65 m ? 4.75 v < vs < 5.25 v vs leakage current i leak_vs 2.2 5 a sleep state into vs pin back-voltage protection threshold v bv_th 150 mv vbus > vs vs > v s_uvlo back-drive current i bd_1 0 3 a vdd < v dd_th , any powered power pin to any unpowered power pin. current out of unpowered pin. i bd_2 0 2 a vdd > v dd_th , any powered power pin to any unpowered power pin, except for vdd to vbus in detect power state and vs to vbus in active power state. current out of unpowered pin. table 3.3 electrical specifications (continued) vdd = 4.5 v to 5.5 v, vs = 2.9 v to 5.5 v, v pullup = 3v to 5.5v, t a = -40 c to 85 c all typical values at vdd = vs = 5 v, t a = 27 c unless otherwise noted. characteristic symbol min typ max unit conditions
usb port power controller with charger emulation datasheet revision 1.2 (05-21-12) 18 smsc ucs1001 datasheet selectable current limits i lim1 450 467 500 ma ilim resistor = 47 k ? (500 ma setting) i lim2 810 839 900 ma ilim resistor = 56 k ? (900 ma setting) i lim3 900 932 1000 ma ilim resistor = 68 k ? (1000 ma setting) i lim4 1080 1112 1200 ma ilim resistor = 82 k ? (1200 ma setting) i lim5 1350 1385 1500 ma ilim resistor = 100 k ? (1500 ma setting) i lim6 1620 1702 1800 ma ilim resistor = 120 k ? (1800 ma setting) i lim7 1800 1892 2000 ma ilim resistor = 150 k ? (2000 ma setting) i lim8 2250 2355 2500 ma ilim resistor = vdd (2500 ma setting) thermal regulation limit t reg 110 c die temperature at which current limit will be reduced thermal regulation hysteresis t reg_hyst 10 c hysteresis for t reg functionality. temperature must drop by this value before ilim value restored to normal operation thermal shutdown threshold t tsd 135 c die temperature at which port power switch will turn off thermal shutdown hysteresis t tsd_hyst 35 c after shutdown due to t tsd being reached, die temperature drop required before port power switch can be turned on again auto-recovery test current i test 190 ma portable device attached, vbus = 0 v, die temp < t tsd auto-recovery test voltage v test 750 mv portable device attached, vbus = 0 v before application, die temp < t tsd discharge impedance r discharge 100 ? table 3.3 electrical specifications (continued) vdd = 4.5 v to 5.5 v, vs = 2.9 v to 5.5 v, v pullup = 3v to 5.5v, t a = -40 c to 85 c all typical values at vdd = vs = 5 v, t a = 27 c unless otherwise noted. characteristic symbol min typ max unit conditions
usb port power controller with charger emulation datasheet smsc ucs1001 19 revision 1.2 (05-21-12) datasheet port power switch - ac parameters turn on delay t on_psw 0.75 ms pwr_en active toggle to switch on time, vbus discharge not active turn off time t off_psw_ina 0.75 ms pwr_en inactive toggle to switch off time c bus = 120 ? f turn off time t off_psw_err 1 ms over-current error, vbus min error, or discharge error to switch off c bus = 120 ? f turn off time t off_psw_err 100 ns tsd or back-drive error to switch off c bus = 120 ? f vbus output rise time t r_bus 1.1 ms measured from 10% to 90% of vbus, c load = 220 ? f ilim = 1.0 a soft turn on rate ? i bus / ? t 100 ma / s temperature update time t dc_temp 200 ms short circuit response time t short_lim 1.5 s time from detection of short to current limit applied. no c bus applied short circuit detection time t short 6 ms time from detection of short to port power switch disconnect and alert# pin assertion. latched mode cycle time t ul 7 ms from pwr_en edge transition from inactive to active to begin error recovery auto-recovery mode cycle time t cycle 25 ms time delay before error condition check auto-recovery delay t rst 20 ms portable device attached, vbus must be > v test after this time discharge time t discharge 200 ms amount of time discharge resistor applied table 3.3 electrical specifications (continued) vdd = 4.5 v to 5.5 v, vs = 2.9 v to 5.5 v, v pullup = 3v to 5.5v, t a = -40 c to 85 c all typical values at vdd = vs = 5 v, t a = 27 c unless otherwise noted. characteristic symbol min typ max unit conditions
usb port power controller with charger emulation datasheet revision 1.2 (05-21-12) 20 smsc ucs1001 datasheet note 3.2 for split supply systems using the attach de tection feature, vs must not exceed vdd + 150 mv. port power switch operation with trip mode current limiting region 2 current keep- out i bus_r2min 0.1 a minimum vbus allowed at output v bus_min 2.0 v port power switch operation with co nstant current limiting (variable slope) region 2 current keep- out i bus_r2min 1.5 a minimum vbus allowed at output v bus_min 2.0 v vbus bypass - dc on resistance r on_byp 50 ? leakage current i leak_byp 3 a switch off current limit i det_chg / i bus_byp 2 ma vdd = 5 v and vbus> 4.75 v allowed charge time t det_charge 800 ms c bus = 500 f max charger emulation profile general emulation - dc dp-dm shunt resistor value r dcp_res 200 ? connected between dpout and dmout 0 v < dpout = dmout < 3v voltage output sx_rxmag_ volt_bc 0.5 v dmout 250 a load pull-down current sx_pupd _acc_bc 50 a dpout or dmout = 0.15 v compliance voltage general emulation - ac emulation reset time t em_reset 50 ms table 3.3 electrical specifications (continued) vdd = 4.5 v to 5.5 v, vs = 2.9 v to 5.5 v, v pullup = 3v to 5.5v, t a = -40 c to 85 c all typical values at vdd = vs = 5 v, t a = 27 c unless otherwise noted. characteristic symbol min typ max unit conditions
usb port power controller with charger emulation datasheet smsc ucs1001 21 revision 1.2 (05-21-12) datasheet figure 3.1 usb rise time / fall time measurement figure 3.2 description of dc terms dpin dpout r chg v bus v tst r chg i tst dmin r chg v bus v tst r chg i tst dmout
usb port power controller with charger emulation datasheet revision 1.2 (05-21-12) 22 smsc ucs1001 datasheet 3.1 esd & transient performance application note: depending on the level of esd protection requir ed by the application, external protection devices may be required. the datasheet esd levels were reached using external devices and standard usb-a connectors; refer to th e evb schematic and reference design for details. note 3.3 operational classification b indicates that during and immediately after an esd event, anomalous behavior may occur; however, it is non-damaging and the device is self- recovering. all iec testing is performed using an smsc evaluation board. note 3.4 operational classification a indicates that during and immediately after an esd event no anomalous behavior will occur. all iec testi ng is performed using an smsc evaluation board. 3.1.1 human body model (hbm) performance hbm testing verifies the ability to withstand es d strikes like those that occur during handling and manufacturing and is done without power applied to the ic. to pass the test, the device must have no change in operation or performance due to the event. 3.1.2 charged device model (cdm) performance cdm testing verifies the ability to withstand esd strikes like those that occur during handling and assembly with pick and place style machinery and is done without power applied to the ic. to pass the test, the device must have no change in operation or performance due to the event. 3.1.3 iec61000-4-2 performance the iec61000-4-2 esd specif ication is an international standard that addresses system-level immunity to esd strikes while the end equipment is operational. these tests are performed while the device is powered. table 3.4 esd ratings esd spec rating or value en / iec61000-4-2 (dpout, dmout pins) air gap, operational classification b (see note 3.3 ) level 4 (15 kv) en / iec61000-4-2 (dpout, dmout pins) direct contact, operational classification b (see note 3.3 ) level 4 (8 kv) en / iec61000-4-2 (vbus, gnd pins) air gap, operational classification a (see note 3.4 ) level 4 (15 kv) en / iec61000-4-2 (vbus, gnd pins) direct contact, operational classification a (see note 3.4 ) level 4 (8 kv) human body model (jedec jesd22-a114) - all pins 8 kv charged device model (jedec jesd22-c101) - all pins 500 v
usb port power controller with charger emulation datasheet smsc ucs1001 23 revision 1.2 (05-21-12) datasheet chapter 4 general description the ucs1001 provides a single usb port power switch for precise control of up to 2.5 amperes continuous current with over-cur rent limit (ocl), dynamic therma l management, latch or auto-recovery fault handling, selectable active low or high enable, under- and over-voltage lockout, and back-voltage protection. split supply support for vbus and vdd is an op tion for low power in system standby states. in addition to power switching and current limiting, the ucs1001 provides charger emulation profiles to charge a wide variety of portable devices, incl uding usb-if bc1.2 (cdp or dcp modes), yd/t- 1591 (2009), most apple and rim portable devices, and many others. figure 4.1 shows a system configuration in which the ucs1001-1 provides a port power switch, low power attach detection, an d charging active signaling. figure 4.2 shows a system configuration in which the ucs1001-2 provides a port power switch, low power attach detection, and portable device attach detection signaling. these configurations ar e useful for applications that already provide usb bc1.2 and/or legacy data line handshaking on the usb data lines, but still require port power switching. figure 4.1 ucs1001-1 system config uration (no charger emulation) ucs1001-1 latch alert# pwr_en 3 v ? 5.5 v gnd device dpin dmin dpout dmout vdd 5 v vbus1 vbus2 vs1 vs2 ilim 3 v ? 5.5 v auto-recovery upon fault latch upon fault em_en m1 m2 sel chrg# 5 v host cbus usb host (dp, dm) s0 disable detect state enable detect state cin vdd
usb port power controller with charger emulation datasheet revision 1.2 (05-21-12) 24 smsc ucs1001 datasheet . figure 4.3 shows a system configuration in which the ucs1001-1 provides a port power switch, low power attach detection, charger emulation (wit h no usb host), and charging active signaling. figure 4.4 shows a system configuration in which the ucs1001-2 provides a port power switch, low power attach detection, charger emulation (with no usb host), and portable device attach detection signaling. these configurations are us eful for wall adapter type applications. figure 4.2 ucs1001-2 system config uration (no charger emulation) ucs1001-2 latch alert# pwr_en 3 v ? 5.5 v gnd device dpin dmin dpout dmout vdd 5 v vbus1 vbus2 vs1 vs2 ilim 3 v ? 5.5 v auto-recovery upon fault latch upon fault em_en m1 m2 sel a_det# 5 v host cbus usb host (dp, dm) s0 disable detect state enable detect statet cin vdd
usb port power controller with charger emulation datasheet smsc ucs1001 25 revision 1.2 (05-21-12) datasheet figure 4.3 ucs1001-1 system configuration (no usb host, with charger emulation) ucs1001-1 latch alert# pwr_en 3 v ? 5.5 v gnd device dpin dmin dpout dmout vdd 5 v vbus1 vbus2 vs1 vs2 ilim 3 v ? 5.5 v auto-recovery upon fault latch upon fault em_en m1 m2 sel chrg# 5 v cbus s0 disable detect state enable detect state cin vdd 15 k 15 k
usb port power controller with charger emulation datasheet revision 1.2 (05-21-12) 26 smsc ucs1001 datasheet . figure 4.4 ucs1001-2 system configuration (no usb host, with charger emulation) ucs1001-2 latch alert# pwr_en 3 v ? 5.5 v gnd device dpin dmin dpout dmout vdd 5 v vbus1 vbus2 vs1 vs2 ilim 3 v ? 5.5 v auto-recovery upon fault latch upon fault em_en m1 m2 sel a_det# 5 v cbus s0 disable detect state enable detect state cin vdd 15 k 15 k
usb port power controller with charger emulation datasheet smsc ucs1001 27 revision 1.2 (05-21-12) datasheet 4.1 ucs1001 power states the ucs1001 has the following power states. ? off - this power state is entered when t he voltage at the vdd pin voltage is < v dd_th . in this state the device is considered ?off?. the ucs1001 will no t retain its digital states. the port power switch, bypass switch, and the high-speed data switches will be off. see section 4.1.1, "off state operation" . ? sleep - this is the lowest power state available. while in this state, the ucs1001 will respond to changes in emulation controls. the high-speed switch and all other functionality will be disabled. see section 4.1.2, "sle ep state operation" . ? detect - this is a lower current power state. in this state, the device is actively looking for a portable device to be attached. the high-speed switch is disabled. see section 4.1.3, "detect state operation" . ? error - this power state is entered when a fault condition exists. see section 4.1.5, "error state operation" . ? active - this power state provides full functionality. while in this state, operations include activation of the port power switch, usb data line handshakin g / charger emulation, and current limiting. see section 4.1.4, "act ive state operation" .
usb port power controller with charger emulation datasheet revision 1.2 (05-21-12) 28 smsc ucs1001 datasheet table 4.1 shows the settings for the various power states, except off and error. if vdd < v dd_th , the ucs1001 is in the off state. to determine the mode of operation in the active state, see ta b l e 8 . 1 , "active mode selection" . application note: using configurations not listed in table 4.1 is not recommended and may produce undesirable results. note 4.1 in order to transition from active state da ta pass-through mode into sleep with these settings, change the m1, m2, and em_en pins before changing the pwr_en pin. see section 8.4, "data pass-through (no charger emulation)" . note 4.2 if s0=?0? and a portable device is not attached in dce cycle mode, the ucs1001 will be cycling through charger emulation profiles. there is no guarantee which charger emulation profile will be applied first when a portable device attaches. table 4.1 power states control settings power state vs pwr_en s0 m1, m2, em_en portable device attached behavior sleep x disabled 0 not set to data pass- through. see note 4.1 . x all switches disabled. vbus will be near ground potential. x enabled 0 all = 0b x detect (see chapter 7, detect state ) x disabled 1 x x high-speed switch disabled. port power switch disabled. host- controlled transition to active state (see section 4.1.3.2, "host- controlled transition from detect to active" ). < v s_uvlo enabled 1 all <> 0b x > v s_uvlo enabled 1 all <> 0b no high-speed switch disabled. automatic transition to active state when conditions met (see section 4.1.3.1, "automatic transition from detect to active" ). active (see chapter 8, active state ) > v s_uvlo enabled 0 all <> 0b and not set to dce cycle x high-speed switch enabled / disabled based on mode. port power switch is on at all times. attach and removal detection disabled. set to dce cycle x high-speed switch disabled. port power switch is on at all times. attach and removal detection disabled. see note 4.2 . > v s_uvlo enabled 1 all <> 0b yes port power switch is on. removal detection enabled.
usb port power controller with charger emulation datasheet smsc ucs1001 29 revision 1.2 (05-21-12) datasheet 4.1.1 off state operation the device will be in the off state if vdd is less than v dd_th . when the ucs1001 is in the off state, it will do nothing, and all circuitry will be disabled. 4.1.2 sleep state operation when the ucs1001 is in the sleep st ate, the device will be in its lowe st power state. the high-speed switch, bypass switch, and the port power switch will be disabled. the attach and removal detection feature will be disabled. vbus will be near ground pot ential. the alert# pin will not be asserted. if asserted prior to entering the sl eep state, the alert# pin will be released. the a_det# pin (ucs1001-2 only) will be released. figure 4.5 shows timing diagrams for waking the ucs1001. 4.1.3 detect state operation when the ucs1001 is in the detect state, the port power switch will be disabled. the high-speed switch is also disabled. the vbus output will be connected to the vdd voltage by a secondary bypass switch (see chapter 7, detect state ). figure 4.5 wake timing m1 or m2 port power switch closed (active state) ~3 ms wake with m1 or m2 to active state data pass-through mode (pwr_en enabled, s0 = ?0?, em_en = ?0?, vs > v s_uvlo ) s0 bypass switch closed (detect state) ~3 ms wake with s0 to host-controlled detect state (pwr_en disabled, vs > v s_uvlo , m1 & m2 & em_en not all ?0? and not set to data pass-through) bypass switch closed (detect state) ~3 ms wake with s0 & pwr_en to auto-transition detect state (vs > v s_uvlo , m1 & m2 & em_en not all ?0? and not set to data pass-through) s0 pwr_en
usb port power controller with charger emulation datasheet revision 1.2 (05-21-12) 30 smsc ucs1001 datasheet there is one non-recommended configuration which places the ucs1001 in the detect state, but v bus will not be discharged and a portable device at tachment will not be detected. for the recommended configurations, see table 4.1, "power states control settings" . ? not recommended: pwr_en is enabled, s0 = ?1?, and m1, m2, and em_en are all ?0?. there are two methods for transitioning from the dete ct state to the active st ate: automatic and host- controlled. 4.1.3.1 automatic transition from detect to active for the detect state, set s0 to ?1?, enable pwr_en, set the em_en, m1, and m2 controls to the desired active mode ( table 8.1, "active mode selection" ), and supply vs > v s_uvlo . when a portable device is attached and an attach detection event o ccurs, the ucs1001 will autom atically transition to the active state and operate according to the selected active mode. 4.1.3.2 host-controlled transition from detect to active for the detect state, set s0 to ?1?, set the em_e n, m1, and m2 controls to the desired active mode ( table 8.1, "active mode selection" ), and configure one of the following: 1) disable pwr_en and supply vs, or 2) enable pwr_en and don?t supply vs. when a portable device is attached and an attach detection event occurs, the host must respond to transition to the active state. depending on the control settings in the detect state, this coul d entail 1) enabling pwr_en or 2) supplying vs above the threshold. application note: if s0 is '1', pwr_en is enabled, and vs is not present, the a_det# pin will cycle if the current draw exceeds the current capacity of the bypass switch. 4.1.3.3 state change from detect to active when conditions cause the ucs1001 to transition from the detect state to the active state, the following occurs: 1. the attach detection feature will be disabled; the removal detection feature remains enabled, unless s0 is changed to ?0?. 2. the bypass switch will be turned off. 3. the discharge switch will be turned on briefly. 4. the port power switch will be turned on. 4.1.4 active state operation every time that the ucs1001 enters the active st ate and the port power switch is closed, it will enter the mode as instructed by the host controller (see chapter 8, active state ). the ucs1001 cannot be in the active state (and therefore, the port power sw itch cannot be turned on) if any of the following conditions exist: 1. vs < v s_uvlo . 2. pwr_en is disabled. 3. m1, m2, and em_en are all set to '0'. 4. s0 is set to ?1? and an attach detection event has not occurred.
usb port power controller with charger emulation datasheet smsc ucs1001 31 revision 1.2 (05-21-12) datasheet 4.1.5 error state operation the ucs1001 will enter the error state from the ac tive state when any of the following events are detected: 1. the maximum allowable internal die temperature (t tsd ) has been exceeded (see section 6.3.1.2 ). 2. an over-current condition has been detected (see section 6.2.1 ). 3. an under-voltage condition on vbus has been detected (see section 4.2.5 ). 4. a back-drive condition has been detected (see section 4.2.3 ). 5. a discharge error has been detected (see section 6.4 ). 6. an over-voltage condition on the vs pins. the ucs1001 will enter the error state from the de tect state when a back-drive condition has been detected or when the maximum allowable internal die temperature has been exceeded. the ucs1001 will enter the error state from the sleep state when a back-drive condition has been detected. when the ucs1001 enters the error state, the por t power switch, the vbus bypass switch, the high- speed switch are turned off, and the alert# pin is asserted. they will remain off while in this power state. the ucs1001 will leave this state as det ermined by the fault handling selection (see section 6.5, "fault handling mechanism" ). when using the latch fault handler and the user has re-activated the device by or toggling the pwr_en control, the ucs1001 will check that all of th e error conditions have been removed. if using auto-recovery fault handler, after the t cycle time period, the ucs1001 will check that all of the error conditions have been removed. if all of the error conditions have been removed, the ucs1001 will return to the active state or detect state, as applicable. returning to the active state will cause the ucs1001 to restart the selected mode (see section 8.2, "active mode selection" ). if the device is in the error state and a removal detection event occurs, it will check the error conditions and then return to the power state defined by the pwr_en, m1, m2, em_en, and s0 controls. 4.2 supply voltages 4.2.1 vdd supply voltage the ucs1001 requires 4.5 v to 5.5 v present on the vdd pin for core device functionality. 4.2.2 vs source voltage vs can be a separate supply and can be greater than vdd to accommodate high current applications in which current path resistances result in unacceptable voltage drops that may prevent optimal charging of some portable devices.
usb port power controller with charger emulation datasheet revision 1.2 (05-21-12) 32 smsc ucs1001 datasheet 4.2.3 back-voltage detection whenever the following conditions are true, the po rt power switch will be disabled, the vbus bypass switch will be disabled, the high-speed data switch will be disabled, and a back-voltage event will be flagged. this will cause the ucs1001 to enter the error power state (see section 4.1.5, "error state operation" ). 1. the vbus voltage exceeds the vs voltage by v bv_th and the port power switch is closed. the port power switch will be opened immediately. if the condition lasts for longer than t mask , then the ucs1001 will enter the error state. otherwise, the port power switch will be turned on as soon as the condition is removed. 2. the vbus voltage exceeds the vdd voltage by v bv_th and the vbus bypass switch is closed. the bypass switch will be opened immediately. if the condition lasts for longer than t mask , then the ucs1001 will enter the error state. otherwise, the bypass switch will be turned on as soon as the condition is removed. 4.2.4 back-drive current protection if a portable device is attached that is self-pow ered, it may drive the vbus port to its power supply voltage level; however, the ucs1001 is designed such that leakage current from the vbus pins to the vdd or vs pins shall not exceed i bd_1 (if the vdd voltage is zero) or i bd_2 (if the vdd voltage exceeds v dd_th ). 4.2.5 under-voltage lockout on vs the ucs1001 requires a minimum voltage (v s_uvlo ) be present on the vs pin for active power state. 4.2.6 over-voltage det ection and lockout on vs the ucs1001 port power switch will be disabled if the voltage on the vs pin exceeds a voltage (v s_ov ) for longer than the specified time (t mask ). this will cause the device to enter the error state. 4.3 discrete input pins application note: if it is necessary to connect any of the control pins except the ilim or sel pins via a resistor to vdd or gnd, the resistor value should not exceed 100 k ? in order to meet the vih and vil specifications. 4.3.1 ilim input the ilim input determines the init ial ilim setting, as shown in table 6.1, "ucs1001 ilim selection" . 4.3.2 sel input the sel pin selects the polarity of the pwr_en cont rol. if the sel pin is high, the pwr_en control is active high enable. if the sel pin is low, the pwr_en control is active low enable. this pin state is latched upon device power-up and further c hanges will have no effect on the pwr_en control polarity. application note: if it is necessary to connect the sel pin to ground via a resistor, a value less than 33k ? must be used. if it is necessary to connect the sel pin to vdd via a resistor, the pull-up resistor may be any value up to 100 k ? .
usb port power controller with charger emulation datasheet smsc ucs1001 33 revision 1.2 (05-21-12) datasheet 4.3.3 m1, m2, and em_en inputs the m1, m2, and em_en input controls determine t he active mode and affect the power state (see table 4.1, "power states control settings" and table 8.1, "active mode selection" ). when these controls are all set to ?0? and pwr_en is enabled, the ucs1001 attach and removal detection feature is disabled. 4.3.4 pwr_en input the pwr_en control enables the port power switch to be turned on if conditions are met and affects the power state (see table 4.1, "power states control settings" ). the port power switch cannot be closed if pwr_en is disabled. however, if pw r_en is enabled, the port power switch is not necessarily closed (see section 4.1.4, "active state operation" ). polarity is controlled by the sel pin. 4.3.5 latch input the latch input control determines the behav ior of the fault handling mechanism (see section 6.5, "fault handling mechanism" ). 4.3.6 s0 input the s0 control enables the attach and removal de tection feature and affe cts the power state (see table 4.1, "power states control settings" ). when s0 is set to ?1?, an attach detection event must occur before the port power switch can be turned on . when s0 is set to ?0?, the attach and removal detection feature is not enabled. 4.4 discrete output pins 4.4.1 alert#, chrg#, a nd a_det# output pins the alert# pin is an active low open-drain interrupt to the host controller. the alert# pin is asserted when an error occurs (see section 4.1.5, "error state operation" ). the alert# pin is released when all error conditions have been removed. the chrg# pin (ucs1001-1 only) provides an active low open-drain output in dication that charging of an attached device is active. it will remain asse rted until this condition no longer exists and then will be automatically released. the a_det# pin (ucs1001-2 only) pr ovides an active low open-drain output indication that a valid attach detection event has occurred. it will remain asserted until the ucs1001 is placed into the sleep state or a removal detection event occurs. for wake on usb, the a_det# pin assertion can be utilized by the system. if the s0 control is ?0? and t he ucs1001 is in the active state, the a_det# pin will be asserted regardless if a portable device is attached or not. if s0 is '1', pwr_en is enabled, and vs is not present, the a_det# pin will cycle if the current draw exceeds the current capacity of the bypass switch. 4.4.2 interrupt blanking the alert#, chrg# (ucs1001-1 only), and a_det# (ucs1001-2 only) pins will not be asserted for a specified time (up to t blank ) after power-up. additionally, an error condition (except for the thermal shutdown) must be present for longer than a specified time (t mask ) before the alert# pin is asserted.
usb port power controller with charger emulation datasheet revision 1.2 (05-21-12) 34 smsc ucs1001 datasheet chapter 5 usb high-speed data switch 5.1 usb high-speed data switch the ucs1001 contains a series usb 2.0 compliant high-speed switch between the dpin and dmin pins and between the dpout and dmout pins. this switch is designed for high-speed, low latency functionality to allow usb 2.0 full-speed and high- speed communications with minimal interference. nominally, the switch is closed in the active state, allowing uninterrupted usb communications between the upstream host and the portable device. the switch is opened when: 1. the ucs1001 is actively emulating using any of the charger emulati on profiles except cdp. 2. the ucs1001 is operating as a dedicated charger. 3. the ucs1001 is in the detect state or in the sleep state. application note: if the vdd voltage is less than v dd_th , the high-speed data switch will be disabled and opened. 5.1.1 usb-if high-speed compliance the usb data switch will not significantly degrade the signal integrity through the device dp / dm pins with usb high-speed communications.
usb port power controller with charger emulation datasheet smsc ucs1001 35 revision 1.2 (05-21-12) datasheet chapter 6 usb port power switch 6.1 usb port power switch to assure compliance to various charging specifications, the ucs1001 contains a usb port power switch that supports two current limiting modes: tr ip and constant current (variable slope). the current limit (ilim) is pin selectable. the switch also includes soft start circ uitry and a separate short circuit current limit. the port power switch is on in the active state (except when vbus is discharging). 6.2 current limiting 6.2.1 current limit setting the ucs1001 hardware set current limit, ilim, can be one of eight values (see table 6.1 ). this resistor value is read once upon ucs1001 power-up. unle ss connected to vdd, the resistors in ta b l e 6 . 1 are pull-down resistors. application note: if it is necessary to connect the ilim pin to vdd via a pull-up resistor, it is recommended that this resistor value not exceed 100 k ? . application note: ilim pin pull-down resistors with values less than 33 k ? will cause unexpected behavior. 6.2.2 short circuit out put current limiting short circuit current limiting occurs when the outp ut current is above the selectable current limit (i limx ). this event will be detected and the current will immediately be limited (within t short_lim time). if the condition remains, the port power switch will flag an error condition and enter the error state (see section 4.1.5, "error state operation" ). table 6.1 ucs1001 ilim selection ilim resistor (5%) ilim setting 47 k ? 500 ma 56 k ? 900 ma 68 k ? 1000 ma 82 k ? 1200 ma 100 k ? 1500 ma 120 k ? 1800 ma 150 k ? 2000 ma vdd 2500 ma
usb port power controller with charger emulation datasheet revision 1.2 (05-21-12) 36 smsc ucs1001 datasheet 6.2.3 soft start when the pwr_en control changes states to enable the port power switch, or an attach detection event occurs in the detect power state and t he pwr_en control is already enabled, the ucs1001 invokes a soft start routine for t he duration of the vbus rise time (t r_bus ). this soft start routine will limit current flow from vs into vbus while it is acti ve. this circuitry will prevent current spikes due to a step in the portable device current draw. in the case when a portable device is attached while the pwr_en pin is already enabled, if the bus current exceeds ilim, the ucs1001 current li miter will respond within a specified time (t short_lim ) and will operate normally at this point. the c bus capacitor will deliver the extra current, if any, as required by the load change. 6.2.4 current limiting modes the ucs1001 current limiting has two modes: trip and constant current (varia ble slope). either mode functions at all times when the port power switch is closed. the current limiting mode used depends on the active state mode (see section 8.9, "current limit mode associations" ). when operating in the detect power state (see section 4.1.3 ), the current capacity at vbus is limited to i bus_byp as described in section 7.2, "vbus bypass switch" . 6.2.4.1 trip mode when using trip current limiting, the ucs1001 usb port power switch functions as a low resistance switch and rapidly turns off if the current limit is exceeded. while operating using trip current limiting, the vbus output voltage will be held relatively constant (equal to the vs voltage minus the r on * ibus current) for all current values up to the ilim. if the current drawn by a portable device exceeds ilim, the following occurs: 1. the port power switch will be turned off (trip action). 2. the ucs1001 will enter the error st ate and assert the alert# pin. 3. the fault handling circuitry will then determine subsequent actions. trip current limiting is used when the ucs1001 is in data pass-through and dedicated charger emulation cycle (except when the bc1.2 dcp or lega cy 2 charger emulation profile is accepted), and when there?s no handshake. application note: to avoid cycling in trip mode, set ilim higher than the highest expected portable device current draw. figure 6.1 shows operation of current limits in trip mode with the shaded area representing the usb 2.0 specified vbus range. dashed lines indicate the port power switch output will go to zero (e.g., trip) when ilim is exceeded. note that operation at all possible values of ilim are shown in figure 6.1 for illustrative purposes only; in actual operat ion only one ilim can be active at any time.
usb port power controller with charger emulation datasheet smsc ucs1001 37 revision 1.2 (05-21-12) datasheet 6.2.4.2 constant current limiting (variable slope) constant current limiting is used when a portable device handshakes using the bc1.2 dcp or legacy 2 charger emulation profiles and the current drawn is greater than ilim (and ilim < 1.5 a). it?s also used in bc1.2 cdp mode and during the dce cycl e when a charger emulation profile is being applied and the timeout is active. in cc mode, the port power switch allows the atta ched portable device to reduce vbus output voltage to less than the input vs voltage while maintaining current delivery. the v/i slope depends on the user set ilim value. this slope is held constant for a given ilim value. figure 6.1 trip current limiting operation 5 4 3 2 1 0.5 1.0 1.5 2.0 2.5 5.25 4.75 ibus (amps) vbus (volts) operating current 0 0 0.9 1.2 1.2 1.0 0.9 0.5 1.5 2.5 1.8 2.0 = ilim?s 1.8 power switch voltage and current output go to zero when ilim is exceeded trip action (ilim = 0.5 a) trip action (ilim = 2.5 a) ilim (amps)
usb port power controller with charger emulation datasheet revision 1.2 (05-21-12) 38 smsc ucs1001 datasheet figure 6.2 shows operation of current limits while usin g cc mode. unlike trip mode, once ibus current exceeds ilim, operation continues at a reduced volt age and increased current. note that the shaded area representing the usb 2.0 specified vbus range is now restricted to an upper current limit of i bus_r2min . note that the ucs1001 will heat up alon g each load line as voltage decreases. if the internal temperature exceeds the t reg or t tsd thresholds, the port power switch will open. also note that when the vbus voltage is brought lo w enough, the port power switch will open. 6.3 thermal management and voltage protection 6.3.1 thermal management the ucs1001 utilizes two-stage internal thermal management. the first is named dynamic thermal management and the second is a fixed thermal shutdown. figure 6.2 constant current limiting (variable slope) operation 5 4 3 2 1 0.5 1.0 1.5 2.0 2.5 5.25 4.75 0 0 0.9 1.2 1.2 1.0 0.9 0.5 1.5 ibus_r2min 1.8 1.8 2.0 2.5 ibus (amps) vbus (volts) ilim (amps) = ilim?s constant resistance i bus operation line 1 (ilim = 0.5 a) constant resistance i bus operation line 5 (ilim = 1.5 a*) cc mode - power switch current increases as voltage decreases when ilim is exceeded following constant resistance lines *1.5 a limit reduced by -3.5% internally
usb port power controller with charger emulation datasheet smsc ucs1001 39 revision 1.2 (05-21-12) datasheet 6.3.1.1 dynamic thermal management for the first stage (active in both current limiting modes), referred to as dynamic thermal management, the ucs1001 automatically adjusts port power swit ch limits and modes to lower power dissipation when the thermal regulation temperature value is approached, as described below. if the internal temperature exceeds the t reg value, the port power switch is opened, the current limit (ilim) will be lowered by one step and a timer is started (t dc_temp ). when this timer expires, the port power switch is closed and the internal temperat ure will be checked again. if it remains above the t reg threshold, the ucs1001 will repeat this cycle (open po rt power switch and reduce the ilim setting by one step) until ilim reaches its minimum value. application note: if the temperature exceeds the treg threshold while operating in the dce cycle mode after a charger emulation profile has been accepted, the profile will be removed. the ucs1001 will not restart the dce cycle until one of the control inputs changes states to restart emulation. application note: the ucs1001 will not actively discharge vbus as a result of the temperature exceeding treg; however, any load current provided by a portable device or other load will cause vbus to be discharged when the port power switch is opened, possibly resulting in an attached portable device resetting. if the ucs1001 is operating using constant current limit ing (variable slope) and the ilim setting has been reduced to its minimum set point and the temperature is still above t reg , the ucs1001 will switch to operating using trip current limit ing. this will be done by reducing the i bus_r2min setting to 100 ma and restoring the ilim setting to the value immediately below the programmed setting (e.g., if the programmed ilim is 1.8 a, the value will be set to 1.5 a). if the temperature continues to remain above t reg , the ucs1001 will continue this cycle (open the port power switch and reduce the ilim setting by one step). if the ucs1001 internal temperature drops below t reg - t reg_hyst , the ucs1001 will take action based on the following: 1. if the current limit mode changed from cc mode to trip mode, then a timer is started. when this timer expires, the ucs1001 will reset the port power switch operation to its original configuration allowing it to operate using constant current limiting (variable slope). 2. if the current limit mode did not change from cc mode to trip mode, or was already operating in trip mode, the ucs1001 will reset the port power swit ch operation to its original configuration. if the ucs1001 is operating using trip current limiting and the ilim setting has been reduced to its minimum set point and the temperature is above t reg , the port power switch will be closed and the current limit will be held at its minimum setting until the temperature drops below t reg - t reg_hyst . 6.3.1.2 thermal shutdown the second stage thermal management consists of a hardware implemented thermal shutdown corresponding to the ma ximum allowable internal die temperature (t tsd ). if the internal temperature exceeds this value, the port power switch will immediately be turned off until the temperature is below t tsd - t tsd_hyst .
usb port power controller with charger emulation datasheet revision 1.2 (05-21-12) 40 smsc ucs1001 datasheet 6.4 vbus discharge the ucs1001 will discharge v bus through an internal 100 ? resistor when at least one of the following conditions occurs: ? the pwr_en control is disabled (triggered on the inactive edge of the pwr_en control). ? a portable device removal detection event is flagged. ? the vs voltage drops below a specified threshold (v s_uvlo ) that causes the port power switch to be disabled. ? when commanded into the sleep power state via the em_en, m1, and m2 controls. ? before each charger emulation profile is applied. ? upon recovery from the error state. ? any time that the port power switch is activa ted after the vbus bypass switch has been on (i.e., whenever vbus voltage transitions from being driven from vdd to being driven from vs, such as going from detect to active power state). ? any time that the vbus bypass switch is activat ed after the port power switch has been on (i.e., going from active to detect power state). when the vbus discharge circuitry is activated, the ucs1001 will confirm that vbus was discharged. if the vbus voltage is not below the v test level, a discharge error will be flagged and the ucs1001 will enter the error state. 6.5 fault handling mechanism the ucs1001 has two modes for handling faults: latch (latch-upon-fault) or auto-recovery (automatically attempt to restore the active power state after a fault occurs). the fault handling mechanism used depends on the state of the latch pin. faults include over-current, over-voltage (on vs), under-voltage (on vbus), back-voltage (vbus to vs or vbus to vdd), discharge error, and maximum allowable internal die temperature (t tsd ) exceeded (see section 4.1.5, "error state operation" ). 6.5.1 auto-recovery fault handling when the latch pin is low, auto-recovery fault handling is used. when an error condition is detected, the ucs1001 will immediately enter the error state and assert the alert# pin (see section 4.1.5 ). independently from the host controller, the ucs1001 will wait a preset time (t cycle ), check error conditions (t tst ), and restore active operation if the er ror condition(s) no longer exist. the alert# pin will be released. 6.5.2 latched fault handling when the latch pin is high, latch fault handling is used. when an error condition is detected, the ucs1001 will enter the error power state and assert the alert# pin. upon command from the host controller (by toggling the pwr_en pin from enabled to disabled), the ucs1001 will check error conditions once and restore active operation if erro r conditions no longer exist. if an error condition still exists, the host controller is required to issue the command again to check error conditions.
usb port power controller with charger emulation datasheet smsc ucs1001 41 revision 1.2 (05-21-12) datasheet chapter 7 detect state 7.1 device attach / removal detection the ucs1001 can detect the attachment and remo val of a portable device on the usb port. attach and removal detection does not perform any charger emulation or qualification of the device. the high-speed switch is ?off? during the detect power state. 7.2 vbus bypass switch in the detect state, vdd is the voltage source; in the active state, vs is the voltage source. the bypass switch and the port power switch are never both on at the same time. while the vbus bypass switch is ac tive, the current available to a portable device will be limited, and the attach detection feature is active. 7.3 attach detection the attach detection feature is only active in t he detect power state. when active, this feature constantly monitors for portable device attachment. when an at tach detection ev ent occurs, the ucs1001-2 will assert the a_det# pin low. the ucs1001-1 internal ly flags the event. once an attach detection event occurs, the ucs1001 will wait for the pwr_en control to be enabled (if not already). when pwr_en is enabled and vs is above the threshold, the ucs1001 will activate the usb port power switch and operate in the selected active mode (see chapter 8, active state ). 7.4 removal detection the removal detection feature will be active in th e active and detect power states if s0 = 1. this feature monitors for portable device removal. when a removal detection event is flagged, the following will be done: 1. disable the port power switch and the bypass switch. 2. de-assert the a_det# pin (ucs1001-2 only). 3. enable an internal discharging device that will discharge the vbus line. 4. once the vbus pin has been discharged, the device will return to the detect state regardless of the pwr_en control state.
usb port power controller with charger emulation datasheet revision 1.2 (05-21-12) 42 smsc ucs1001 datasheet chapter 8 active state 8.1 active state overview the ucs1001 has the following modes of operation in the active state: data pass-through, bc1.2 dcp, bc1.2 sdp, bc1.2 cdp, and dedicated charger emulation cycle. the current limiting mode depends on the active mode behavior (see table 8.2, "current limit mode options" ). 8.2 active mode selection the active mode selection is controlled by three controls: em_en, m1, and m2, as shown in ta b l e 8 . 1 . note 8.1 bc1.2 sdp behaves the same as the data pass-through mode with the exception that it is preceded by a vbus discharge when the mode is entered per the bc1.2 specification. 8.3 bc1.2 detection renegotiation the bc1.2 specification allows a charger to act as an sdp, cdp, or dcp and to change between these roles. to force an attached portable device to re peat the charging detection procedure, vbus must be cycled. in compliance with this sp ecification, the ucs1 001 automatically cycles vbus when switching between the bc1.2 sdp, bc1. 2 dcp, and bc1.2 cdp modes. 8.4 data pass-through (n o charger emulation) when commanded to data pass-through mode, ucs1001 will close its usb high-speed data switch to allow usb communications between a portable dev ice and host controller and will operate using trip current limiting. no charger emul ation profiles are applied in this mode. data pass-through mode will persist until commanded otherwise by the m1, m2, and em_en controls. application note: if it is desired that the data pass-throu gh mode operates as a traditional / standard port power switch, the s0 control should be set to ?0?. when entering this mode, there is no automatic vbus discharge. table 8.1 active mode selection # m1 m2 em_en active mode 1 0 0 1 dedicated charger emulation cycle 2 0 1 0 data pass-through 3 0 1 1 bc1.2 dcp 4 1 0 0 bc1.2 sdp - see note 8.1 5 1 0 1 dedicated charger emulation cycle 6 1 1 0 data pass-through 7 1 1 1 bc1.2 cdp
usb port power controller with charger emulation datasheet smsc ucs1001 43 revision 1.2 (05-21-12) datasheet application note: when the m1, m2, and em_en controls are set to ?0?, ?1?, ?0? or to ?1?, ?1?, ?0? respectively, data pass-through mode will persist if the pwr_en control is disabled; however, the ucs1001 will draw more current. to leave data pass-through mode, the pwr_en control must be enabled before the m1, m2, and em_en controls are changed to the desired mode. 8.5 bc1.2 sdp (no charger emulation) when commanded to bc1.2 sdp mode, ucs1001 will discharge vbus, close its usb high-speed data switch to allow usb communications between a portable device and host controller, and will operate using trip current limiting. no charger em ulation profiles are applied in this mode. bc1.2 sdp mode will persist until commanded otherwise by the m1, m2, em_en, and pwr_en controls. application note: if it is desired that the bc1.2 sdp mode oper ates as a traditional / standard port power switch, the s0 control should be set to ?0?. 8.6 bc1.2 cdp when bc1.2 cdp is selected as the active mode, ucs1001 will discharge vbus, close its usb high- speed data switch, and apply the bc1.2 cdp charger emulation profile which performs handshaking per the specification. the combination of t he ucs1001 cdp handshake along with a standard usb host comprises a charging downstream port. if the handshake is successful, the ucs1001 will operat e using constant current limiting (variable slope). if the handshake is not successful, the ucs1 001 will leave the applied cdp profile in place, leave the high-speed switch closed, enable constant current limiting, an d persist in this condition until commanded otherwise by the m1, m2, em_en, and pwr_en controls. the ucs1001 will respond per the bc1.2 specificat ion to portable device initiated charger renegotiation requests. application note: bc1.2 compliance testing may require the s0 control to be set to ?0? (attach and removal detection feature disabled) while testing is in progress. application note: when the ucs1001 is in bc1.2 cdp mode and the attach and removal detection feature is enabled, if a power thief, such as a usb ligh t or fan, attaches but does not assert dp, a removal event will not occur when the portable device is removed. however, if a standard usb device is subsequently attached, removal detection will again be fully functional. as well, if pwr_en is cycled or m1, m2, and / or em_en change state, a removal event will occur and attach detection will be reactivated. 8.6.1 bc1.2 cdp charger emulation profile the bc1.2 cdp charger emulation profile acts as described below. application note: all cdp handshaking is performed with the high-speed switch closed. 1. vbus voltage is applied. 2. primary detection - when the portable device drives a voltage between 0.4 v and 0.8 v onto the dpout pin, the ucs1001 will drive 0.6 v onto the dmout pin within 20 ms. 3. when the portable device drives the dpout pin back to ?0?, the ucs1001 will then drive the dmout pin back to ?0? within 20 ms. 4. optional secondary detection - if the portable devi ce then drives a voltage of 0.6 v (nominal) onto the dmout pin, the ucs1001 will take no other action. this will cause the portable device to observe a ?0? on the dpout pin and know that it is connected to a cdp.
usb port power controller with charger emulation datasheet revision 1.2 (05-21-12) 44 smsc ucs1001 datasheet 8.7 bc1.2 dcp when bc1.2 dcp is selected as the active mode, ucs1001 will discharge vbus and apply the bc1.2 dcp charger emulation profile per the specification. in bc1.2 dcp mode, the emulation timeout and requirement for portable device current draw are automatically disabled. when the bc1.2 dcp charger emulation profile is applied within the dedicated charger emulation cycle (see section 8.10.1, "bc1.2 dcp charger emulation profile within dce cycle" ), the timeout and current draw requirement are enabled. if the portable device is charging after the dcp charger emulation profile is applied, the ucs1001 will leave in place the resistive short, leave the high-speed switch open, and enable constant current limiting (variable slope). application note: bc1.2 compliance testing may require the s0 control to be set to ?0? (attach and removal detection feature disabled) while testing is in progress. 8.7.1 bc1.2 dcp charger emulation profile the bc1.2 dcp charger emulation profile is described below. 1. vbus voltage is applied. a resistor (r dcp_res ) is connected between the dpout and dmout pins. 2. primary detection - if the portable device driv es 0.6 v (nominal) onto the dpout pin, the ucs1001 will take no other action than to leave the re sistor connected between dpout and dmout. this will cause the portable device to see 0.6 v (nominal) on the dmout pin and know that it is connected to a dcp. 3. optional secondary detection - if the portable dev ice drives 0.6 v (nominal) onto the dmout pin, the ucs1001 will take no other action than to leave the resistor connected between dpout and dmout. this will cause the portable device to see 0.6 v (nominal) on the dpout pin and know that it is connected to a dcp. 8.8 dedicated charger when commanded to dedicated charger emulation cycle mode, the ucs1001 enables an attached portable device to enter its charging mode by applying specific charger emulation profiles in a predefined sequence. using these profiles, the ucs1001 is capable of generating and recognizing several signal levels on the dpout and dmout pins. the preloaded charger emulation profiles include ones compatible with bc1.2 dcp, yd/t-1591 (2009) and most apple and rim portable devices. no active usb data communication is possible when charging in this mode. 8.8.1 emulation reset prior to applying any of the charger emulation pr ofiles, the ucs1001 will perform an emulation reset. this involves the following: 1. the ucs1001 resets the vbus line by disconnecting the port power switch and connecting vbus to ground via an internal 100 ? resistor. the port power switch will be held open for a time equal to t em_reset at which point the port power switch wil l be closed and the vbus voltage applied. 2. the dpout and dmout pins will be pulled low using internal 15 k ? pull-down resistors. application note: to help prevent possible damage to a portable device, the dpout and dmout pins have current limiting in place when the emulation profiles are applied.
usb port power controller with charger emulation datasheet smsc ucs1001 45 revision 1.2 (05-21-12) datasheet 8.8.2 emulation cycling in dedicated charger emulation cycle mode, the charger emulation profiles will be applied in the following order: 1. legacy 1 2. bc1.2 dcp 3. legacy 2 4. legacy 3 5. legacy 4 6. legacy 5 7. legacy 6 8. legacy 7 application note: if s0=?0? and a portable device is not attached in dce cycle mode, the ucs1001 will be cycling through charger emulation profiles. t here is no guarantee which charger emulation profile will be applied first when a portable device attaches. 8.8.3 dce cycle retry if none of the charger emulation profiles cause a charge current to be drawn, the ucs1001 will perform emulation reset and cycle through the profiles again. the ucs1001 will continue to cycle through the profiles so as long as char ging current is not drawn and th e pwr_en control is enabled. 8.9 current limit mode associations the ucs1001 will close the port power switch and use the current limiting mode as shown in ta b l e 8 . 2 . table 8.2 current li mit mode options active mode current limit mode data pass-through trip mode bc1.2 dcp cc mode if ilim < 1.5 a, otherwise, trip mode bc1.2 sdp trip mode bc1.2 cdp cc mode if ilim < 1.5 a, otherwise, trip mode dce cycle during dce cycle when a charger emulation profile is being applied cc mode if ilim < 1.5 a, otherwise, trip mode bc1.2 dcp charger emulation profile accepted cc mode if ilim < 1.5 a, otherwise, trip mode legacy 2 charger emulation profile accepted cc mode if ilim < 1.5 a, otherwise, trip mode legacy 1 or legacy 3 - legacy 7 charger emulation profile accepted trip mode
usb port power controller with charger emulation datasheet revision 1.2 (05-21-12) 46 smsc ucs1001 datasheet 8.10 preloaded charger emulation profiles the following charger emulation profiles are resident to the ucs1001: 1. legacy 1 - see section 8.10.3 2. legacy 2 - see section 8.10.2 3. legacy 3 - see section 8.10.3 4. legacy 4 - see section 8.10.3 5. legacy 5 - see section 8.10.4 6. legacy 6 - see section 8.10.4 7. legacy 7 - see section 8.10.5 8. bc1.2 cdp - see section 8.6.1 9. bc1.2 dcp - see section 8.7.1 8.10.1 bc1.2 dcp charger emulat ion profile within dce cycle when the bc1.2 dcp charger emulation profile ( section 8.7.1, "bc1.2 dcp charger emulation profile" ) is applied within the dce cycle (dedicated c harger emulation cycle is selected as the active mode), the behavior after the profile is applied is different than active mode bc1.2 dcp (bc1.2 dcp in ta b l e 8 . 1 ) because the t em_timeout timer is enabled during the dce cycle. during the dce cycle after the dcp charger emulat ion profile, the ucs1001 will perform one of the following: 1. if the portable device is charging, the ucs1001 will internally flag that a bc1.2 dcp was detected. the ucs1001 will leave in place the resistive short ?? leave the high-speed switch open, and then enable constant current limiting (variable slope). 2. if the portable device is not charging, the ucs1001 will stop applying the dcp charger emulation profile and proceed to the next charger emulation profile in the dce cycle. 8.10.2 legacy 2 charger emulation profile the legacy 2 charger emulation profile does the following: 1. the ucs1001 will connect a resistor (r dcp_res ) between dpout and dmout. 2. vbus is applied. 3. if the portable device is charging, the ucs1001 w ill accept that this is the correct charger emulation profile for the attached portable device. the re sistive short between the dpout and dmout pins will be left in place. the ucs1001 will use constant current limiting. 4. if the portable device is not c harging, the ucs1001 will stop the legacy 2 charger emulation. this will cause resistive short between the dpout a nd dmout pins to be removed. emulation reset occurs, and the ucs1001 will initiate the next charger emulation profile. 8.10.3 legacy 1, 3, 4, and 6 charger emulation profiles legacy 1, 3, 4, and 6 charger em ulation profiles follow the same pattern of operation although the voltage that is applied on the dpout and dmout pins will vary. they do the following: 1. the ucs1001 will apply a voltage on the dpout pin using either a current-limited voltage source or a voltage divider between vbus and ground with the center tap on the dpout pin.
usb port power controller with charger emulation datasheet smsc ucs1001 47 revision 1.2 (05-21-12) datasheet 2. the ucs1001 will apply a possibly different voltage on the dmout pin using either a current- limited voltage source or a voltage divider between vbus and ground with the center tap on the dmout pin. 3. vbus voltage is applied. 4. if the portable device is chargi ng, the ucs1001 will accept that the currently applied profile is the correct charger emulation profile for the attached portable device. the voltages applied to the dpout and dmout pins will remain in place. the ucs 1001 will begin operating in trip mode 5. if the portable device is not charging, the ucs1001 will stop the cu rrently applied charger emulation profile. this will cause all volt ages put onto the dpout and dmout pins to be removed. emulation reset occurs, and the ucs1001 will initiate the next charger emulation profile. 8.10.4 legacy 5 charger emulation profile legacy 5 charger emulation profile does the following: 1. the ucs1001 will apply 900 mv to both the dpout and the dmout pins. 2. vbus voltage is applied. 3. if the portable device is chargi ng, the ucs1001 will accept that the currently applied profile is the correct charger emulation profile for the attached portable device. the voltages applied to the dpout and dmout pins will remain in place. the ucs 1001 will begin operating in trip mode 4. if the portable device is not charging, the ucs1001 will stop the cu rrently applied charger emulation profile. this will cause all volt ages put onto the dpout and dmout pins to be removed. emulation reset occurs, and the ucs1001 will initiate the next charger emulation profile.
usb port power controller with charger emulation datasheet revision 1.2 (05-21-12) 48 smsc ucs1001 datasheet 8.10.5 legacy 7 charger emulation profile the legacy 7 charger emulation profile does the following: 1. the ucs1001 will apply a voltage on the dpout pin using a voltage divider between vbus and ground with the center tap on the dpout pin. 2. vbus voltage is applied. 3. if the portable device is c harging, the ucs1001 will accept that legacy 7 is the correct charger emulation profile for the attached portable dev ice. the voltage applied to the dpout pin will remain in place. the ucs1001 will begin operating in trip mode 4. if the portable device is not charging, the ucs1001 will stop the legacy 7 charger emulation profile. this will cause the voltage put onto the dpout pi n to be removed. emulation reset occurs, and the ucs1001 will initiate the next charger emulation profile.
usb port power controller with charger emulation datasheet smsc ucs1001 49 revision 1.2 (05-21-12) datasheet chapter 9 package information figure 9.1 ucs1001 package view
usb port power controller with charger emulation datasheet revision 1.2 (05-21-12) 50 smsc ucs1001 datasheet figure 9.2 ucs1001 package dimensions and notes
usb port power controller with charger emulation datasheet smsc ucs1001 51 revision 1.2 (05-21-12) datasheet figure 9.3 ucs1001 pcb layout notes figure 9.4 recommended thermal landing solder paste pattern 12 mil via pattern
usb port power controller with charger emulation datasheet revision 1.2 (05-21-12) 52 smsc ucs1001 datasheet 9.1 package markings the package is marked as shown in figure 9.5 . figure 9.5 ucs1001 package markings bottom bottom marking not allowed line: 1 ? smsc logo without circled (r) symbol line: 2 ? device id, version line: 3 ? last 7 digits of lot number line: 4 ? revision and country code (rcc) lines 1 to 3: center horizontal alignment line 4: left horizontal alignment pb-free/green symbol (matte sn) 0.41 3x 0.56 top e3 pin 1 1001 cc r 123456a - v u
usb port power controller with charger emulation datasheet smsc ucs1001 53 revision 1.2 (05-21-12) datasheet chapter 10 typical operating curves figure 10.1 usb-if high-sp eed eye diagram (without data switch) figure 10.2 usb-if high-speed eye diagram (with data switch) figure 10.3 short applied after power up figure 10.4 power up into a short figure 10.5 internal power switch short re sponse figure 10.6 vbus discharge behavior
usb port power controller with charger emulation datasheet revision 1.2 (05-21-12) 54 smsc ucs1001 datasheet figure 10.7 data switch off isolation vs. frequency figure 10.8 data switch bandwidth vs. frequency figure 10.9 data switch on resistance vs. temp fi gure 10.10 power switch on resistance vs. temp figure 10.11 r dcp_res resistance vs.temp figure 10.12 power switch on / off time vs. temp
usb port power controller with charger emulation datasheet smsc ucs1001 55 revision 1.2 (05-21-12) datasheet figure 10.13 vs over-voltage threshold vs. temp figure 10.14 vs under voltage threshold vs. temp figure 10.15 detect state vbus vs. ibus figure 10.16 trip curre nt limit operation vs. temp. figure 10.17 ibus measurement accuracy
usb port power controller with charger emulation datasheet revision 1.2 (05-21-12) 56 smsc ucs1001 datasheet figure 10.18 active state current vs. temp figure 10.19 detect state current vs. temp figure 10.20 sleep state current vs. temp
usb port power controller with charger emulation datasheet smsc ucs1001 57 revision 1.2 (05-21-12) datasheet chapter 11 document revision history table 11.1 customer revision history revision level & date section/f igure/entry correction revision 1.2 (05-21-12) cover ? certification added: ? ul recognized and en/iec 60950-1 (cb) certified? revision 1.2 (05-16-12) cover ? source voltage: vs min moved from 2.7 to 2.9 v to accomodate ul ta b l e 3 . 3 , " e l e c t r i c a l specifications" ? source voltage: vs min moved from 2.7 to 2.9 v to accomodate ul revision 1.2 (03-16-12) cover ? there are nine preloaded charger emulation profiles. chapter 2, pin description ? changed ?unused connection? to n/a for ilim, sel, latch, and s0 pins as they must be used. ? added note 2.1 : total leakage current from pins 3 and 4 (vbus) to ground must be less than 100 a for proper attach / removal detection operation. ta b l e 3 . 3 , " e l e c t r i c a l specifications" ? updated selectable current limits (ilimx) min and max values. typical values did not change. ? changed i active from 500 a (typ) to 650 a (typ). ? changed i active from tbd a (max) to 750 a (max). ? changed i sleep from tbd a (max) to 8 a (max). ? changed i detect from 190 a (typ) to 185 a (typ). ? changed i detect from tbd a (max) to 220 a (max). ? removed v s_ov min value (5.6 v) and max value (tbd). ? changed r on_psw from 70 m ? (max) to 65 m ? (max). ? changed i leak_vs from tbd a (max) to 5 a (max). ? changed i leak_byp from 0.5 a (max) to 3 a (max). ? changed i bd_1 from 2 a (max) to 3 a (max). table 4.1, "power states control settings" ? "behavior" cell in the "sleep" row: clarified behavior by adding "vbus will be near ground potential?. section 4.1.2, "sleep state operation" ? clarified behavior by adding "vbus will be near ground potential?. section 4.2.3, "back-voltage detection" and section 4.2.4, "back-drive current protection" ? section ?back-voltage / back-drive detection? split into two. ? in section 4.2.4, "back-drive current protection" , corrected reference i bd_lk to match elec spec symbol i bd_1 and rewrote back-drive description. section 6.2.4, "current limiting modes" ? added: the current limiting mode used depends on the active state mode (see section 8.9, "current limit mode associations" ). section 6.2.4.1, "trip mode" ? added application note: to avoid cycling in trip mode, set ilim higher than the highest expected portable device current draw. table 8.2, "current limit mode options" ? rearranged rows so dce cycle is grouped together. ? added row for dce cycle when a charger emulation profile is being applied.
usb port power controller with charger emulation datasheet revision 1.2 (05-21-12) 58 smsc ucs1001 datasheet revision 1.2 (03-16-12) cont. section 8.8.2, "emulation cycling" and section 8.10.5, "legacy 7 charger emulation profile" ? legacy 7 charger emulation profile added. chapter 10, typical operating curves ? rearranged order of tocs. ? added new tocs: ? figure 10.3, "short applied after power up" ? figure 10.5, "internal power switch short response" ? figure 10.16, "trip current limit operation vs. temp." ? figure 10.17, "ibus measurement accuracy" ? figure 10.18, "active state current vs. temp" ? figure 10.19, "detect state current vs. temp" ? figure 10.20, "sleep state current vs. temp" ? updated the following: ? figure 10.6, "vbus discharge behavior" ? figure 10.11, "rdcp_res resistance vs.temp" ? figure 10.13, "vs over-voltage threshold vs. temp" ? figure 10.14, "vs under voltage threshold vs. temp" ? figure 10.15, "detect state vbus vs. ibus" revision 1.1 (11-21-11) table 3.2, "power dissipation summary" ? missing units added. ta b l e 3 . 3 , " e l e c t r i c a l specifications" ? changed t det_charge from 400 ms to 800 ms typ and changed condition from c bus = 220 f to c bus = 500 f max. ? vs leakage current changed from 0.8 a typical to 2.2 a. ? changed i bd_1 and i bd_2 from tbd typ to 0 a typ and from 1.5 a max to 2 a max ? changed i tst to i test and changed typ from 165 to 190 ma. ? changed t on_psw from 3 ms to 0.75 ms typical and t off_psw_ina from 1 ms to 0.75 ms typical. ? added discharge time (t discharge ) and allowed charge time (t det_charge ). table 3.4, "esd ratings"section 3.1 ? charged device model: changed from 200 v to 500 v note 4.1 ? added note: in order to transition from active state data pass- through mode into sleep with these settings, change the m1, m2, and em_en pins before changing the pwr_en pin. table 4.1, "power states control settings" , section 4.1.2, "sleep state operation" , section 5.1, "usb high- speed data switch" ? the high-speed switch is open in sleep. section 4.2.2, "vs source voltage" ? added. cover, section 8.10.3, "legacy 1, 3, 4, and 6 charger emulation profiles" ? legacy 6 profile has been defined. table 11.1 customer revision history (continued) revision level & date section/f igure/entry correction
usb port power controller with charger emulation datasheet smsc ucs1001 59 revision 1.2 (05-21-12) datasheet revision 1.1 (11-21-11) cont. section 8.4, "data pass- through (no charger emulation)" ? data pass-through persists until m1, m2, or em_en controls are changed. it is no longer affected by pwr_en. added application note: when the m1, m2, and em_en controls are set to ?0?, ?1?, ?0? or to ?1?, ?1?, ?0? respectively, data pass- through mode will persist if the pwr_en control is disabled; however, the ucs1001 will draw more current. to leave data pass-through mode, the pwr_en control must be enabled before the m1, m2, and em_en controls are changed to the desired mode. section 8.6, "bc1.2 cdp" ? bc1.2 cdp mode uses constant current limiting. added application note: bc1.2 compliance testing may require the s0 control to be set to ?0? (attach and removal detection feature disabled) while testing is in progress. ? added application note: when the ucsx100x is in bc1.2 cdp mode and the attach and removal detection feature is enabled, if a power thief, such as a usb light or fan, attaches but does not assert dp, a removal event will not occur when the portable device is removed. however, if a standard usb device is subsequently attached, removal detection will again be fully functional. as well, if pwr_en is cycled or m1, m2, and / or em_en change state, a removal event will occur and attach detection will be reactivated. section 8.7, "bc1.2 dcp" ? added application note: bc1.2 compliance testing may require the s0 control to be set to ?0? (attach and removal detection feature disabled) while testing is in progress. table 8.2, "current limit mode options" ? bc1.2 cdp charger emulation changed from using ?trip? to ?cc mode if ilim < 1.5 a, otherwise, trip mode?. section 8.10.4, "legacy 5 charger emulation profile" ? added. the legacy 5 charger emulation profile no longer applies a voltage divider. it applies 900 mv to dpout and dmout. revision 1.0 (08-18-11) initial release table 11.1 customer revision history (continued) revision level & date section/f igure/entry correction

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