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november 2008 rev 1 1/19 19 STUSBCD01B usb charger detection interface features capable of detecting dedicated usb chargers and host chargers (current sink and dedicated methods) operates with v bat supply voltage ranging from 2.2 v to 4.5 v active high open drain hardware detection pin (detect) gpio control interface 1.6 v - 2.8 v interface voltage range (v io ) v bus voltage 6 v clamping circuit low dp-dm input capacitance esd: hbm 2 kv, cdm 500 v on every pin 12 bumps flip-chip package, 1.6 x1.2 mm, pitch 0.4 mm, max thickness 0.60 mm, halogen free rohs compliant package applications mobile phones pdas, mp3 players description the STUSBCD01B is a usb charger detection ic which can detect dedicated usb chargers, host/hub chargers or standard host ports connected to the usb dp/dm data lines. the device implements two different detection methods in order to be able to distinguish between a dedicated charger and a host/hub charger. operation is controlled through three general purpose i/o pins; a hardware open drain detection output is also available. an internal regulator provides the 1.8 v supply voltage for the internal blocks and state machine while a clamping device prevents v bus voltage from going over 6 v (typ.). the STUSBCD01B is available in a 12 bumps flip-chip 0.4 mm pitch package. flip-chip 12 (1.6 x 1.2 mm) table 1. device summary order code package packaging STUSBCD01Bjr flip-chip 12 (1.6 x 1.2 mm) 3000 parts per reel www.st.com
contents STUSBCD01B 2/19 contents 1 application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3.1 detection methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3.2 dedicated charger detection method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3.3 current sink method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3.4 detection triggering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3.5 v bus clamping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3.6 internal regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 4 functional tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 5 maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 6 electrical characteristi cs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 7 timing diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 8 package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 9 revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
STUSBCD01B application 3/19 1 application figure 1. application circuit
pin configuration STUSBCD01B 4/19 2 pin configuration figure 2. bump configuration (top through view) table 2. pin description bump name symbol type description c3 vbat pwr analog supply voltage input (2.2 v - 4.5 v) c2 gnd pwr ground reference a3 v io pwr digital interface supply voltage (1.6 v - 2.8 v) b4 dp ai/o connected to usb d+ data line a4 dm ai/o connected to usb d- data line b2 detect o hardware detection pin (open drain). 300 k internal pull-down resistor. v bat referred. a2 shutdown i standby mode selection pin. active high. terminates the detection and resets the device. a1 /oe i output enable for detect output. active low. b1 status/ method ai/o sw detection output: high when charger detected. pulled high or low through internal weak pull-up to 1v8v and weak pull-down. detection method selection input: low for dedicated method, high for current sink method. b3 default method ai hardware selection for detection method. active only if v io is not present. dedicated method is selected if driven low, current sink method if driven high. v bat referred. do not leave floating to avoid increased power consumption. c4 vbus ai v bus voltage comparator input. triggers th e charger detection. 6v limited voltage when 10 v are applied externally. c1 1v8v o regulator output voltage. bypass capacitor not required.
STUSBCD01B functional description 5/19 3 functional description the STUSBCD01B is designed to provide usb charger detection functionality to usb platforms which do not have this feature integrated in the phy. the device can work with a supply voltage ranging from 2.2 v to 4.5 v and has an internal regulator which generates the 1.8 v voltage required for the internal blocks and state machine. the STUSBCD01B can detect a dedicated charger or a host/hub charger connected to usb data lines and provides both an open drain pin and a digital i/o pin for the detection output signal. the open drain output can be disabled using the /oe input signal. two different detection methods, selectable through the status/method pin, are implemented in order to distinguish between a dedicated charger and a host/hub charger. if the interface voltage is not present the detection method is defined by the status of default method pin. the STUSBCD01B features very low power consumption in standby mode and low input capacitance on dp/dm pins. an over voltage protection circuit is also implemented on the vbus pin in order to limit v bus voltage to 6 v and provide protection to external devices connected to it. 3.1 detection methods the STUSBCD01B implements a current source/sink method to detect dedicated chargers (wall chargers) and a current sink method for host/hub chargers (based on usb battery charging spec v1.0). if a standard host/hub is connected to the device it is recognized thanks to its pull-down resistors on dp/dm lines and therefore detect/status outputs will be low. 3.2 dedicated charger detection method selected driving method pin low during the falling edge of shutdown or driving default method pin low if v io is not present. the dedicated charger detection method uses a current source on dp pin and a current sink on dm pin to detect the resistor (max 200 ) which connects dp and dm in dedicated chargers. 3.3 current sink method selected driving method pin high during the falling edge of shutdown or driving default method pin high if v io is not present. a voltage source of vdat_src is connected to dp and a current of idat_sink is drawn from dm. if a host/hub charger is connected, stusbc d01b will see a voltage of vdat_src on pin dm. the same happens if a dedicated charger is connected and, therefore, in order to distinguish between the two, if the current sink method detection is successful it is necessary to run the dedicated charger detection method immediately after.
functional description STUSBCD01B 6/19 3.4 detection triggering usb charger detection automatically starts when v bus voltage is over v th_vbus threshold and shutdown input is low. if v bus drops under v th_vbus threshold or shutdown input is pulled high, the charger detection is immediately terminated. if no charger is detected (detect = 0 and /oe = 0), v bus voltage is kept over v th_vbus threshold and v io is not present then a new detection is started every 1 s. if a charger is detected, detect and status pins are kept high until v bus drops under v th_vbus threshold or a new detection is started. any hardware detection (v io not present) is terminated as soon as v io voltage rises above v th_io threshold. 3.5 v bus clamping the STUSBCD01B features a built in over voltage protection circuit which prevents v bus voltage from going over 6 v. the device is able to withstand continuous voltages of up to 10 v applied to v bus pin through an external resistor; in this case the clamping circuit limits the voltage to 6 v within 1 s. a 470 resistor in series between v bus voltage and v bus pin is required. any external device needing v bus over-voltage protection must be connected to STUSBCD01B's v bus pin. minimum input resistance for v bus pin in normal operating conditions (up to ~ 5.3 v) is 400 k . 3.6 internal regulator the STUSBCD01B has an internal regulator which outputs 1.8 v (nominal) to supply internal blocks. the regulat or does not require any by pass capacitor for stability.
STUSBCD01B functional description 7/19 figure 3. functional diagram
functional tables STUSBCD01B 8/19 4 functional tables note: see timing diagrams for more details. table 3. operating mode shutdown /oe v io vbat vbus status- detect operating mode x x x not available x x power down h x available available not available x (1) standby (sw control) - - not available available not available l standby (no sw control) l x available available available l active, sw detection - - not available available available l active, hw detection 1. low when value is not forced by controller. table 4. output signals v io shutdown detection result /oe status/method detect available l charger detected l h (pull up active) active (driving to v bat ) available l charger detected h h (pull up active) l (internally pulled down) available l charger not detected x l (pull down active) l (internally pulled down) available h - x input l (internally pulled down) not available - charger detected - undefined active (driving to v bat ) not available - charger not detected - undefined l (internally pulled down) table 5. pin states during detection detection method dp dm dedicated outputs i dch_src sinks i dat_sink current sink outputs v dat_src sinks i dat_sink
STUSBCD01B maximum ratings 9/19 5 maximum ratings note: absolute maximum ratings are those values above which damage to the device may occur. functional operation under these conditions is not implied. all voltages are referenced to gnd. table 6. absolute maximum ratings (1) 1. exceeding the absolute maximum rating may damage the device. symbol parameter value unit v bat battery supply voltage 6 v v bus usb v bus voltage 6 v usb v bus voltage with external 470 resistor 12 v dp, dm, detect, default method detection pins 6 v v x all other pins -0.5 to 4.6 v t stg storage temperature range -65 to +150 c esd (2) 2. devices are esd sensitive. handling precaut ions recommended. human body model, 1.5 k in series with 100 pf. electrostatic discharge voltage (according to hbm jesd22-a114d) 2 kv electrostatic discharge voltage (according to cdm jesd22-c101c) 200 v table 7. recommended operating conditions (1) symbol parameter min. typ. max. unit v bat analog supply voltage 2.2 4.2 4.5 v v io interface supply voltage 1.5 1.8 2.8 v v bus v bus voltage 0 5.25 v 1. the device is not guaranteed to f unction outside its operating rating.
electrical characteristics STUSBCD01B 10/19 6 electrical characteristics note: 1 specification applies to the follo wing pins: /oe, shutdown, status/method 2 specification applies to default method pin. table 8. dc electrical characteristics (power supply and digital i/o pins) (1) (v bat = 4.2 v, t a = 25c, specifications over temperature, -40 to 85 c) 1. characterized specification( s), but not production tested. symbol parameter test conditions min. typ. max. unit 1v8v ldo regulated voltage output v bus > v th_vbus , v bat = 2.2v to 4.5v 1.76 1.8 1.84 v i bat v bat supply current v bat = 2.2 to 4.5v; standby mode 20 a v bat = 2.2 to 4.5v; detection 1 ma i io v io supply current status/method=?open? 5 a v th_io v io detection threshold voltage 1 v v il low level input voltage ( note 1 ) v io = 1.6 to 2.8v 0.15 v io v v ih high level input voltage ( note 1 ) v io = 1.6 to 2.8v 0.85 v io v v ildm low level input voltage ( note 2 ) 0.15 v bat v v ihdm high level input voltage ( note 2 ) 0.85 v bat v i il low level input leakage (shutdown, /oe) v io = 1.6 to 2.8v, all inputs at gnd 5 a i ih high level input leakage (shutdown, /oe) v io = 1.6 to 2.8v, all inputs at v io 5 a v ol low level output voltage (status) i ol = +10a, v io = 1.8v 0 100 mv v oh high level output voltage (status) i oh = -10a, v io = 1.8v 1.7 1.8 v c in input capacitance ( note 1 )4pf
STUSBCD01B electrical characteristics 11/19 table 9. dc electrical characteristics (analog pins) (v bat = 4.2 v, t a = 25 c, specifications over temperature, -40 to 85 c) symbol parameter test conditions min. typ. max. unit v bus v bus voltage 0 5.25 v i vbus v bus current v bus =0 to 5.25v 10 a v bus_clmp v bus clamping voltage r ext = 470 5.3 6 v v th_vbus v bus voltage detection threshold 2 4 v z in_vbus v bus input impedance v bus max 5.25v 400 k c in dp, dm input capacitance 5 pf v dat_src data source voltage (1) i dp =i dat_src (2) 0.615 0.65 0.7 v v dat_ref data detect voltage 0.25 0.34 v i dat_sink data sink current v dm =v dat_sink (3) 50 100 a i dch_src dedicated charger detection dp source current 15 30 a v thdpl dp low threshold 0.6 v z pd_det detect pin pull down impedance /oe=1 240 300 360 k v oh_det detect output driving voltage i oh_det = 0.5ma, v bat = 2.2 to 4.5v v bat ?0.2 v bat v 1. measured at dp pin. includes effect of internal switches. 2. i dat_src = 0 to 200 a according to usb specs. 3. v dat_sink = 0.15 v to 3.6 v according to usb specs. table 10. ac electrical characteristics (1) (v bat = 4.2 v, t a = 25 c, specifications over temperature, -40 to 85 c) symbol parameter test conditions min. typ. max. unit t vbus_dbnc v bus debounce time 5 8 ms t dp_src_on dp source on time current sink method 100 170 ms t chgr_det_dbnc charger detect debounce current sink method 20 40 ms t dpsrc_hicrnt dp source off to detect high time current sink method 40 70 ms t d_vdat v dat_src on delay current sink method 5 8 ms t vbus_det_cs v bus attach to detect high time current sink method 150 270 ms t vbus_det_dc v bus attach to detect high time dedicated charger method 145 248 ms t idch_src_on i dch_src on time (2) dedicated charger method 140 240 ms t idat_sink_on i dat_sink on time dedicated charger method 40 70 ms t d_idat_sink i dch_src on to i dat_sink on delay dedicated charger method 100 170 ms t per_det periodic detection period hardware detection, no charger 11.6s t w_h/l minimum pulse width high/low all digital inputs 2 s 1. all ac parameters guaranteed by design but not production tested. 2. t idch_src_on = t d_idat_sink + t idat_sink_on
timing diagrams STUSBCD01B 12/19 7 timing diagrams figure 4. current sink method (with charger connected) <20ms v bus+ v dat_src applied to dp v bus v bus- t vbus_dbnc i dat_sink applied to dm v dat_det detect t dm_src_en 0.615-0.7v 50-100 a t dpsrc_hicrnt 5ms >100ms t dp_src_on >40ms t chgr_det_dbnc >20ms t vbus_dbnc 5ms 150ms < t vbus_det_cs < 270ms dm_src either returned v dat_src if dedicated charger or applied v dat_src by host charger <20ms t dm_src_dis v dat_det (comparator output, see functional diagram) must be high for >20ms for charger detection to be valid t d_vdat 5ms <20ms v bus+ v dat_src applied to dp v bus v bus- t vbus_dbnc i dat_sink applied to dm v dat_det detect t dm_src_en 0.615-0.7v 50-100 a t dpsrc_hicrnt 5ms >100ms t dp_src_on >40ms t chgr_det_dbnc >20ms t vbus_dbnc 5ms 150ms < t vbus_det_cs < 270ms dm_src either returned v dat_src if dedicated charger or applied v dat_src by host charger <20ms t dm_src_dis v dat_det (comparator output, see functional diagram) must be high for >20ms for charger detection to be valid t d_vdat 5ms
STUSBCD01B timing diagrams 13/19 figure 5. dedicated charger detection method (with charger connected) v bus+ i dch_src applied to dp v bus v bus- t vbus_dbnc i dat_sink applied to dm detect 15-30 a 50-100 a t vbus_dbnc 145ms < t vbus_det_dc < 248ms dp t d_idat_sink dm t idat_sink_on t idch_src_on v bus+ i dch_src applied to dp v bus v bus- t vbus_dbnc i dat_sink applied to dm detect 15-30 a 50-100 a t vbus_dbnc 145ms < t vbus_det_dc < 248ms dp t d_idat_sink dm t idat_sink_on t idch_src_on
package mechanical data STUSBCD01B 14/19 8 package mechanical data in order to meet environmental requirements, st offers these devices in ecopack ? packages. these packages have a lead-free second level interconnect. the category of second level interconnect is marked on the package and on the inner box label, in compliance with jedec standard jesd97. the maximum ratings related to soldering conditions are also marked on the inner box label. ecopack is an st trademark. ecopack specifications are available at: www.st.com.
STUSBCD01B package mechanical data 15/19 dim. mm. mil s . min. typ. max. min. typ. max. a 0.52 0.56 0.60 20.5 22.0 2 3 .6 a1 0.17 0.20 0.2 3 6.7 7. 99 .1 a2 0. 3 50. 3 60. 3 71 3 . 8 14.2 14.6 b 0.2 3 0.26 0.2 99 .1 10.2 11.4 d 1.54 3 1.5 93 1.64 3 60.7 62.7 64.7 d1 1.20 47.2 e 1.15 1.202 1.25 45. 3 47. 3 4 9 .2 e1 0. 8 0 3 1.5 e 0.40 15.7 s e 0.20 7. 9 flip-chip 12 mechanical data 7504 89 2-d bottom view top view 0.075 bottom view top view 0.075
package mechanical data STUSBCD01B 16/19 dim. mm. inch. min. typ. max. min. typ. max. a1 8 0 7.0 8 7 c 12. 8 1 3 .2 0.504 0.520 d 20.2 0.7 9 5 n60 2. 3 62 t 14.4 0.567 ao 1.4 3 1.4 8 1.5 3 0.056 0.05 8 0.060 bo 1.71 1.76 1. 8 1 0.067 0.06 9 0.071 ko 0.75 0. 8 00. 8 5 0.0 3 0 0.0 3 1 0.0 33 po 3 . 9 4.1 0.154 0.161 p 3 . 9 4.1 0.154 0.161 tape & reel flip-chip 12 mechanical data
STUSBCD01B package mechanical data 17/19 figure 6. footprint data (mm.)
revision history STUSBCD01B 18/19 9 revision history table 11. document revision history date revision changes 18-nov-2008 1 initial release.
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