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1. general description the ssl2115x is a low-cost non-dimmable led dr iver ic. it is designed to drive leds in isolated flyback or non-isolated buck-boost topologies. the device includes a high-voltage power switch and a circuit enabling start-up dire ctly from the rectified mains voltage. it has a good controlled output current. 2. features and benefits ? compact solution with a small form factor and a low component count ? ease of integration ? primary side sensing (no optocoupler required) ? true current source behavior: ? led current independent of mains voltage, led voltage and temperature variation ? led current accuracy (10 %) ? line regulation: ? 3 % at 230 v ? 10 % ? load regulation: ? 3 % between 0.5 ? u max and 0.85 ? u max ? efficiency up to 86 % depending on the application ? power factor 0.6 or ~0.9 using valley fill ? low ripple current < 1 % ? internal protections: ? overtemperature protection (otp) ? led short protection (i out (0 v ? v maximum) at a constant level) ? led open protection ? undervoltage lockout (uvlo) ? internal supply voltage generation enabling start-up from the rectified mains voltage ? so7 package ssl2115x low-cost non-dimmable led driver ic rev. 2 ? 7 june 2012 product data sheet
ssl2115x all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 7 june 2012 2 of 15 nxp semiconductors ssl2115x low-cost non-dimmable led driver ic 3. applications ? ssl21151 is suitable for applic ations up to 5 w mains power ? ssl21153 is suitable for applications up to 10 w mains power ? ssl retrofit lamps (small-sized light bulbs or led spots) ? led module, mains ac/dc converter (down-lights) ? led strings (retail displays) 4. quick reference data 5. ordering information table 1. quick reference data symbol parameter conditions min typ max unit v cc supply voltage operating range ? 0.3 - 35 v r dson drain-source on-state resistance ssl21151; t j =25 ?c 13 15.5 17 ? ssl21153; t j =25 ?c 3.5 4.8 6 ? f sw(high) high switching frequency normal operation 48 50.5 53 khz i m(drain) peak current on pin drain ssl21151 ? 0.7 - +0.7 a ssl21153 ? 1.5 +1.5 a v drain voltage on pin drain ? 2- +700v t j junction temperature ? 40 +150 ? c table 2. ordering information type number package name description version SSL21151T so7 plastic small package outline body; 7 leads; body width 3.9 mm sot1175-1 ssl21153t
ssl2115x all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 7 june 2012 3 of 15 nxp semiconductors ssl2115x low-cost non-dimmable led driver ic 6. block diagram 7. pinning information 7.1 pinning 7.2 pin description fig 1. block diagram ssl2115x

fig 2. pin configuration

table 3. pin description symbol pin description gnd1 1 ground gnd2 2 ground gnd3 3 ground sense 4 transformer status sensing vcc 5 supply voltage source 6 source of the internal power switch drain 7 drain of the internal power switch
ssl2115x all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 7 june 2012 4 of 15 nxp semiconductors ssl2115x low-cost non-dimmable led driver ic 8. functional description 8.1 introduction the ssl2115x is an integrated circuit intended for retrofit small form factor ssl lamps. it provides a controller with an internal high-voltage switch to drive leds. it operates directly from the rectified mains. 8.2 current source operation a flyback inductor is calculated using equation 1: (1) where ? ? is the efficiency of the complete fly back converter ? f sw(high) is the high switching frequency ? u max the maximum combined voltage of the connected leds and the voltage drop of the output rectifier ? l is the primary inductance of the flyback transformer ? i pk is the peak current through of the flyback transformer (2) v drain = voltage on pin drain t on = turn-on time t off = turn-off time v m = peak voltage v i = input voltage n = transformer winding turns ratio v out = output voltage. fig 3. drain switching wave form
!" " " ## " $% #&''&!( l i led u max ? ?? 0.85 ? f sw high ?? 0.5 i pk 2 ?? ? ? -------------------------------------------------------------------- = i pk v ref high ?? pk r source --------------------------- =
ssl2115x all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 7 june 2012 5 of 15 nxp semiconductors ssl2115x low-cost non-dimmable led driver ic where ? v ref(high)pk is the peak high reference voltage ? r source is the value of the resistor connected to the source pin 8.3 leading-edge blanking (leb) the controller has a fixed leb of 325 ns to avoid wrong detection of the primary peak current. 8.4 dv/dt detection the end of demagnetization is detected when the voltage on the sense pin is <50 mv. 8.5 turn-off-time (t off ) a blanking time is applied at the beginning of t off during t blank time to observe the demagnetization. 8.6 supply concepts vcc and undervoltage lockout (uvlo) an integrated junction gate field-effect trans istor (jfet), connected to the drain voltage, provides the start-up current. the ic starts switching when the voltage on pin vcc exceeds the v cc(startup) level. after start-up, an external supply is required, which an auxiliary winding connection can provide. when the voltage on pin vcc drops below the v cc(uvlo) level, the ic stops switching and is reset. design the voltage of the auxiliary winding to ensure that the v cc supply voltage has a u max value of ? 29 v 8.7 peak current detection the cycle-by-cycle peak drain cu rrent limit circuit uses the external source resistor r source to measure the primary peak current. the circuit is activated after the leading edge blanking time. the protection circuit limits the source voltage over resistor r source to v th(det)source , thus limiting the primary peak current. 8.8 led overtemperature protection (otp) an external temperature dependent resistor can be applied for led over temperature protection. 8.9 led output short-ci rcuit protection (osp) when the output short-circuit protection is ac tivated, the ic enters shutdown mode. only a power-on reset (switching off the mains voltage) activates normal operation. 8.10 output led open- circuit protection if an open circuit occurs on the leds, the outpu t voltage increases at each cycle of the ac/dc converter. energy is no longer trans ferred to the leds. the energy accumulated at the primary side is transferred to the supply of the ic vi a the auxiliary winding. the ic
ssl2115x all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 7 june 2012 6 of 15 nxp semiconductors ssl2115x low-cost non-dimmable led driver ic limits the v led when vcc reaches the v prot(vcc) value. a non-latched application can be created depending on implementation of a sma ll preload. without the small preload, the protection latches. 8.11 operational limits the application must stay in current control mode (ccm) for normal functionality. during normal operation, the switch ing frequency can reach 0.85 ? f sw(high) . this requirement must be met for the highest specified led voltage. on the other hand, the converter must be capable to handle the lowest specified led voltage. the auxiliary winding of the transformer generates the ic?s vcc supply voltage. as the minimum and maximum requirements for the supply voltage of the ic have a given ratio, the ratio of the lowest and hi ghest led voltage is also determined. choose the auxiliary voltage ca refully if a large led voltag e ratio is required. an led voltage ratio up to three can be realized with this ic. the open output protection limits the output voltage to u max / 0.85 when the circuit is designed according to the guidelines contained in this data sheet.
ssl2115x all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 7 june 2012 7 of 15 nxp semiconductors ssl2115x low-cost non-dimmable led driver ic 9. limiting values [1] human body model: equivalent to dischar ging a 100 pf capacitor through a 1.5 k ? series resistor. 10. thermal characteristics table 4. limiting values in accordance with the absolute ma ximum rating system (iec 60134). symbol parameter conditions min max unit general t amb ambient temperature ? 40 +85 ?c t j junction temperature ? 40 +150 ?c t stg storage temperature ? 55 +150 ?c voltages v cc supply voltage continuous [1] ? 0.3 +35 v v drain voltage on pin drain ? 2+700v v sense voltage on pin sense current limited ? 20 +5 v currents i m(drain) peak current on pin drain ssl21151 ? 0.7 +0.7 a ssl21153 ? 1.5 +1.5 a i drain current on pin drain ssl21151 ? 0.1 +0.7 a ssl21153 ? 0.1 +1.5 a i source current on pin source ssl21151 ? 0.7 +0.1 a ssl21153 ? 1.5 +0.1 v esd electrostatic discharge voltage human body model; all pins (except drain) [1] ? 2+2 kv pin drain ? 1+1 kv charged device model ? 500 +500 v table 5. thermal characteristics symbol parameter conditions typ unit r th(j-a) thermal resistance from junction to ambient in free air; so7 package, pcb: 475 mm, 2-layer, 70 ? m cu per layer 136 k/w in free air; so7 package, pcb: 1750 mm, 1-layer, 35 ? m cu per layer 136 k/w
ssl2115x all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 7 june 2012 8 of 15 nxp semiconductors ssl2115x low-cost non-dimmable led driver ic 11. characteristics table 6. characteristics t amb = 25 ? c, vcc = 20 v; v sense = 0 v; r source = 1.5 ? ; all voltages referenced to gnd, positive currents flow into the ic, unless otherwise specified. symbol parameter conditions min typ max unit supply i cc supply current operating 0.53 0.75 0.97 ma v cc(startup) start-up supply voltage 15 17 19 v v cc(uvlo) undervoltage lockout supply voltage 7.5 8.5 9.5 v i startup(drain) start-up current on pin drain 0.2 0.7 1.6 ma v br(drain) breakdown voltage on pin drain 700 - - v output stage r dson drain-source on-state resistance ssl21151; t j =25 ?c 13 15.5 17 ? ssl21153; t j =25 ?c3 . 54 . 86 ? i drain(off) off-state drain current v drain = 325 v - 1 - ? a temperature protection t th(otp) overtemperature protection threshold temperature junction temperature 140 150 160 ?c t otp(hys) overtemperature pr otection trip hysteresis junction temperature - 50 ?c peak current comparator (source pin) t d(ocp) overcurrent protection delay time dv/dt = 0.2 v/ ? s - 100 - ns t leb leading edge blanking time 290 325 360 ns v ref(high)pk high peak reference voltage maximum peak voltage without jitter 0.525 0.555 0.585 v v ref(low)pk low peak reference voltage in led open output mode 0.085 0.1 0.115 v v ref-0v reference voltage at start-up or 0 v feedback voltage in cc mode with v fbs = 0 v 0.18 0.21 0.24 v sense input (sense pin) v th(ovp)sence sense overvoltage protection threshold voltage 3.1 3.2 3.3 v v ref(sense) sense reference voltage led overvoltage mode 2.5 - 2.6 v v th(det)demag(sense) demagnetization detection voltage level on sense pin 25 50 75 mv frequency switching f jit /f sw jitter frequency to switching frequency ratio in all operation modes except in burst mode 579% f sw(high) high switching frequency maximum switching, without jitter 48 50.5 53 khz f sw(low) low switching frequency minim um switching, without jitter. 21 22.5 24 khz ? max maximum duty cycle 72 75 78 %
ssl2115x all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 7 june 2012 9 of 15 nxp semiconductors ssl2115x low-cost non-dimmable led driver ic 12. application information the application is shown in figure 4 . more information can be found in the application note for the ssl2115x fig 4. a typical ssl2115x application

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ssl2115x all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 7 june 2012 10 of 15 nxp semiconductors ssl2115x low-cost non-dimmable led driver ic 13. package outline fig 5. package outline sot1175-1 (so7) references outline version european projection issue date iec jedec jeita sot1175-1 - - - - - - - - - sot1175-1_po 10-03-30 10-04-21 unit mm max nom min 1.75 0.250 0.175 0.100 0.25 0.49 0.40 0.36 5.0 4.9 4.8 a dimensions note 1. plastic or metal protrusions of 0.15 mm maximum per side are not included. 2. plastic interlead protrusions of 0.25 mm maximum per side are not included. a 1 a 2 1.45 1.35 1.25 a 3 b p 1.0 0.7 0.4 0.70 0.67 0.60 0.25 l p qv c 0.25 0.20 0.19 de 4.0 3.9 3.8 e 1.27 1.05 6.2 6.0 5.8 h e l 0.1 0.7 0.5 0.3 8 4 0 yz 0.25 w 2.5 0 5 mm scale so7: plastic small outline package; 7 leads; body width 3.9 mm sot1175-1 y d a 1 a 2 q a a 3 detail x l p l x e a h e va c pin 1 index z e b p w 4 1 75
ssl2115x all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 7 june 2012 11 of 15 nxp semiconductors ssl2115x low-cost non-dimmable led driver ic 14. abbreviations table 7. abbreviations acronym description bcm boundary conduction mode bom bill of materials jfet junction field- effect transistor leb leading-edge blanking led light emitting diode mosfet metal-oxide semiconductor field-effect transistor ocp overcurrent protection osp output short protection otp overtemperature protection pcb printed-circuit board pwm pulse-width modulation smps switched mode power supply uvlo undervoltage lockout zcs zero-current switching
ssl2115x all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 7 june 2012 12 of 15 nxp semiconductors ssl2115x low-cost non-dimmable led driver ic 15. revision history table 8. revision history document id release date data sheet status change notice supersedes ssl2115x v.2 20120607 product data sheet - ssl2115x v.1 modifications ? data sheet title changed ? minor text changes to section 1 ? general description ? on page 1 . ? minor text changes to section 2 ? features and benefits ? on page 1 . ? minor text changes to section 4 ? quick reference data ? on page 2 . ssl2115x v.1 20120529 objective data sheet - -
ssl2115x all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 7 june 2012 13 of 15 nxp semiconductors ssl2115x low-cost non-dimmable led driver ic 16. legal information 16.1 data sheet status [1] please consult the most recently issued document before initiating or completing a design. [2] the term ?short data sheet? is explained in section ?definitions?. [3] the product status of device(s) described in this document may have changed since this document was published and may differ in case of multiple device s. the latest product status information is available on the internet at url http://www.nxp.com . 16.2 definitions draft ? the document is a draft versi on only. the content is still under internal review and subject to formal approval, which may result in modifications or additions. nxp semiconductors does not give any representations or warranties as to the accuracy or completeness of information included herein and shall hav e no liability for the consequences of use of such information. short data sheet ? a short data sheet is an extract from a full data sheet with the same product type number(s) and title. a short data sheet is intended for quick reference only and should not be relied upon to contain detailed and full information. for detailed and full information see the relevant full data sheet, which is available on request vi a the local nxp semiconductors sales office. in case of any inconsistency or conflict with the short data sheet, the full data sheet shall prevail. product specification ? the information and data provided in a product data sheet shall define the specification of the product as agreed between nxp semiconductors and its customer , unless nxp semiconductors and customer have explicitly agreed otherwis e in writing. in no event however, shall an agreement be valid in which the nxp semiconductors product is deemed to offer functions and qualities beyond those described in the product data sheet. 16.3 disclaimers limited warranty and liability ? information in this document is believed to be accurate and reliable. however, nxp semiconductors does not give any representations or warranties, expressed or implied, as to the accuracy or completeness of such information and shall have no liability for the consequences of use of such info rmation. nxp semiconductors takes no responsibility for the content in this document if provided by an information source outside of nxp semiconductors. in no event shall nxp semiconductors be liable for any indirect, incidental, punitive, special or consequential damages (including - without limitation - lost profits, lost savings, business interruption, costs related to the removal or replacement of any products or rework charges) whether or not such damages are based on tort (including negligence), warranty, breach of contract or any other legal theory. notwithstanding any damages that customer might incur for any reason whatsoever, nxp semiconductors? aggregate and cumulative liability towards customer for the products described herein shall be limited in accordance with the terms and conditions of commercial sale of nxp semiconductors. right to make changes ? nxp semiconductors reserves the right to make changes to information published in this document, including without limitation specifications and product descriptions, at any time and without notice. this document supersedes and replaces all information supplied prior to the publication hereof. suitability for use ? nxp semiconductors products are not designed, authorized or warranted to be suitable for use in life support, life-critical or safety-critical systems or equipment, nor in applications where failure or malfunction of an nxp semiconductors product can reasonably be expected to result in personal injury, death or severe property or environmental damage. nxp semiconductors and its suppliers accept no liability for inclusion and/or use of nxp semiconducto rs products in such equipment or applications and therefore such inclusion and/or use is at the customer?s own risk. applications ? applications that are described herein for any of these products are for illustrative purpos es only. nxp semiconductors makes no representation or warranty that such applications will be suitable for the specified use without further testing or modification. customers are responsible for the design and operation of their applications and products using nxp semiconductors products, and nxp semiconductors accepts no liability for any assistance with applications or customer product design. it is customer?s sole responsibility to determine whether the nxp semiconductors product is suitable and fit for the customer?s applications and products planned, as well as fo r the planned application and use of customer?s third party customer(s). customers should provide appropriate design and operating safeguards to minimize the risks associated with their applications and products. nxp semiconductors does not accept any liability related to any default, damage, costs or problem which is based on any weakness or default in the customer?s applications or products, or the application or use by customer?s third party customer(s). customer is responsible for doing all necessary testing for the customer?s applic ations and products using nxp semiconductors products in order to av oid a default of the applications and the products or of the application or use by customer?s third party customer(s). nxp does not accept any liability in this respect. limiting values ? stress above one or more limiting values (as defined in the absolute maximum ratings system of iec 60134) will cause permanent damage to the device. limiting values are stress ratings only and (proper) operation of the device at these or any other conditions above those given in the recommended operating conditions section (if present) or the characteristics sections of this document is not warranted. constant or repeated exposure to limiting values will permanently and irreversibly affect the quality and reliability of the device. terms and conditions of commercial sale ? nxp semiconductors products are sold subject to the gener al terms and conditions of commercial sale, as published at http://www.nxp.com/profile/terms , unless otherwise agreed in a valid written individual agreement. in case an individual agreement is concluded only the terms and conditions of the respective agreement shall apply. nxp semiconductors hereby expressly objects to applying the customer?s general terms and conditions with regard to the purchase of nxp semiconducto rs products by customer. no offer to sell or license ? nothing in this document may be interpreted or construed as an offer to sell products t hat is open for acceptance or the grant, conveyance or implication of any lic ense under any copyrights, patents or other industrial or intellectual property rights. document status [1] [2] product status [3] definition objective [short] data sheet development this document contains data from the objecti ve specification for product development. preliminary [short] data sheet qualification this document contains data from the preliminary specification. product [short] data sheet production this document contains the product specification.
ssl2115x all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 7 june 2012 14 of 15 nxp semiconductors ssl2115x low-cost non-dimmable led driver ic export control ? this document as well as the item(s) described herein may be subject to export control regu lations. export might require a prior authorization from competent authorities. quick reference data ? the quick reference data is an extract of the product data given in the limiting values and characteristics sections of this document, and as such is not comple te, exhaustive or legally binding. non-automotive qualified products ? unless this data sheet expressly states that this specific nxp semicon ductors product is automotive qualified, the product is not suitable for automotive use. it is neither qualified nor tested in accordance with automotive testing or application requirements. nxp semiconductors accepts no liabili ty for inclusion and/or use of non-automotive qualified products in automotive equipment or applications. in the event that customer uses t he product for design-in and use in automotive applications to automotive specifications and standards, customer (a) shall use the product without nxp semiconductors? warranty of the product for such automotive applicat ions, use and specifications, and (b) whenever customer uses the product for automotive applications beyond nxp semiconductors? specifications such use shall be solely at customer?s own risk, and (c) customer fully indemnifies nxp semiconductors for any liability, damages or failed product claims resulting from customer design and use of the product for automotive app lications beyond nxp semiconductors? standard warranty and nxp semiconduct ors? product specifications. 16.4 trademarks notice: all referenced brands, produc t names, service names and trademarks are the property of their respective owners. greenchip ? is a trademark of nxp b.v. 17. contact information for more information, please visit: http://www.nxp.com for sales office addresses, please send an email to: salesaddresses@nxp.com
nxp semiconductors ssl2115x low-cost non-dimmable led driver ic ? nxp b.v. 2012. all rights reserved. for more information, please visit: http://www.nxp.com for sales office addresses, please se nd an email to: salesaddresses@nxp.com date of release: 7 june 2012 document identifier: ssl2115x please be aware that important notices concerning this document and the product(s) described herein, have been included in section ?legal information?. 18. contents 1 general description . . . . . . . . . . . . . . . . . . . . . . 1 2 features and benefits . . . . . . . . . . . . . . . . . . . . 1 3 applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 4 quick reference data . . . . . . . . . . . . . . . . . . . . . 2 5 ordering information . . . . . . . . . . . . . . . . . . . . . 2 6 block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 3 7 pinning information . . . . . . . . . . . . . . . . . . . . . . 3 7.1 pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 7.2 pin description . . . . . . . . . . . . . . . . . . . . . . . . . 3 8 functional description . . . . . . . . . . . . . . . . . . . 4 8.1 introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 8.2 current source operation . . . . . . . . . . . . . . . . . 4 8.3 leading-edge blanking (leb) . . . . . . . . . . . . . 5 8.4 dv/dt detection . . . . . . . . . . . . . . . . . . . . . . . . . 5 8.5 turn-off-time (t off ) . . . . . . . . . . . . . . . . . . . . . . . 5 8.6 supply concepts vcc and undervoltage lockout (uvlo) . . . . . . . . . . . . . . . . . . . . . . . . 5 8.7 peak current detection . . . . . . . . . . . . . . . . . . . 5 8.8 led overtemperature prot ection (otp) . . . . . 5 8.9 led output short-circuit protection (osp). . . . 5 8.10 output led open-circuit protection . . . . . . . . . 5 8.11 operational limits . . . . . . . . . . . . . . . . . . . . . . . 6 9 limiting values. . . . . . . . . . . . . . . . . . . . . . . . . . 7 10 thermal characteristics . . . . . . . . . . . . . . . . . . 7 11 characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . 8 12 application information. . . . . . . . . . . . . . . . . . . 9 13 package outline . . . . . . . . . . . . . . . . . . . . . . . . 10 14 abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . 11 15 revision history . . . . . . . . . . . . . . . . . . . . . . . . 12 16 legal information. . . . . . . . . . . . . . . . . . . . . . . 13 16.1 data sheet status . . . . . . . . . . . . . . . . . . . . . . 13 16.2 definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 16.3 disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 16.4 trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . . 14 17 contact information. . . . . . . . . . . . . . . . . . . . . 14 18 contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

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