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1. general description the SSL2129AT is a high-voltage integrated circuit (ic) for driving led lamps in general lighting applications. the main benefits of this ic include: ? small printed-circuit board (pcb) footprint and compact solution ? high efficiency (up to 95 %) for non-dimmable high power factor solutions ? high power factor (>0.9) ? ease of integration and many protection features ? low electronic bill of material (bom) ? mains phase-cut dimmable using external components ? highly flexible ic for use in buck, buck/boost and flyback modes ? single inductor used for non-isolated configurations because of internal demagnetization detection and dv/dt supply the ic range has been designed to start up directly from the hv supply using an internal h i gh-voltage current source. an internal clamp limits the supply voltage. 2. features and benefits ? led controller ic for driving strings of leds or high-voltage led modules from a rectified mains supply ? con troller provides power-efficient boundary conduction mode of operation with: ? no reverse recovery loss es in fre ewheel diode ? ze ro-current switching (z cs) for switch turn-on ? zero-volt a ge or valley switching for switch turn-off ? min imal required inductance value and size ? fa st transient response through cycle-by-cycle current control: ? no over or undershoots in the led current ? sim ple high input power factor solution (>0.9) ? inter nal protection features: ? und ervoltage lockout (uvlo) ? l eading-edge blanking (leb) ? ove rcurrent protection (ocp) ? in ternal overtemperature protection (otp) SSL2129AT dimmable led controller ic rev. 2 ? 23 october 2012 product data sheet
SSL2129AT all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 23 october 2012 2 of 21 nxp semiconductors SSL2129AT dimmable led controller ic ? brownout protection ? ma ins phase cut dimmable led driver solution: ? support s both leading and trailing-edge dimmers ? ea sy external temperature protection with a single ntc ? open output protection using external components ? comp atible with wall swit ch es with built-in indication light during standby ? ic lifetime easily matc hes or surp asses led lamp lifetime ? inp ut current distributed evenly over the ph ase, reducing required output capacitor size and bleeder dissipation 3. applications the SSL2129AT is intended for mains dimmable compact led lamps for single mains input voltages. mains input voltages include 100 v, 120 v and 230 v (ac). the external compon ents determine the power range. 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 8 - 14 v i cc(int) internal supply current normal operation - 1.3 - ma v hv voltage on pin hv - - 600 v v drain voltage on pin drain ? 0.4 - 60 0 v f conv conversion frequency - 100 - khz v o(driver)max maximum output voltage on pin driver vcc > v cc(startup) 9 10.5 12 v table 2. ordering information type number package name description version SSL2129AT so8 plastic small package outline body; 8 leads; body width 3.9 mm sot96-1
SSL2129AT all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 23 october 2012 3 of 21 nxp semiconductors SSL2129AT dimmable led controller ic 6. block diagram fig 1. SSL2129AT block diagram aaa-004040 ntc function supply: internal regulator and bandgap valley detection logic control and protection ocp thermal shutdown por logic jfet hv vcc ntc gnd source driver drain tonmod 4 5 8 6 1 2 3 7 tonmod blank toffmax 0.5 v < > 0.25 v
SSL2129AT all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 23 october 2012 4 of 21 nxp semiconductors SSL2129AT dimmable led controller ic 7. pinning information 7.1 pinning 7.2 pin description fig 2. SSL2129AT pin configuration table 3. pin description symbol pin description hv 1 high-voltage supply pin vcc 2 supply voltage ntc 3 temperature protection input source 4 low-side external switch driver 5 driver output tonmod 6 on time modulation input gnd 7 ground drain 8 high-side external switch
SSL2129AT all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 23 october 2012 5 of 21 nxp semiconductors SSL2129AT dimmable led controller ic 8. functional description 8.1 introduction the SSL2129AT is a controller ic solution for small form factor mains phase-cut dimmable led lamps in isolated and non-isolated applications. 8.2 converter operation the converter in the SSL2129AT is a bounda ry conduction mode (bcm), peak current controlled system. see figure 3 for the basic application diagram. see figure 4 for the waveforms. this converter type operates at the boundary between continuous and discontinuous mo de . energy is stored in inductor l each pe riod that the switch is on. the inductor current i l is zero when the mosfet is switched on. the amplitude of the current build-up in l is proportional to the voltage drop over the inductor and the time that the mosfet switch is on. when the mosfet is switched off, the energy in the inductor is released towards the output. the current then falls at a rate proportional to the value of v out . the led current i led depends on the peak current through the inductor (SSL2129AT controlled) and on the dimmer angle while it is optimized for a high-power factor. a new cycle is started once the inductor current i l is zero. this quasi-resonant operation results in higher efficiency. 8.3 driver pin the SSL2129AT is equi pped with a driver ou tput for controlling an external switch. the voltage on the driver output pin is increased towards v o(driver)max to open the switch during the first cycle (t 0 to t 1 ). the voltage on the driver output pin is pulled down towards a low level from the start of the secondar y stroke until the ne xt cycle starts (t 0 to t 00 ). during transition from low to high and back, there is a controlled switching slope steepness. this controlled condition limits the hi gh frequency radiation from the circuit to the surrounding area. the switching slope can be controlled further using an external resistor between ic and gate. at the lowest vcc voltage (v cc(stop) ), the voltage of the driver is v o(driver)min . fig 3. SSL2129AT basic application diagram ic hv tonmod l v in v out vcc vcc drain ntc driver gnd ntc leds source aaa-004042 1 2 3 7 5 4 6 8 r sense
SSL2129AT all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 23 october 2012 6 of 21 nxp semiconductors SSL2129AT dimmable led controller ic 8.4 valley detection a new cycle is started when the pr imary switch is switched on (see figure 4 ). in the following sections, ?on? represents the conduc tive state and off the non-conductive state. following time t 1 , when the peak current is detected on the source pin, the switch is turned off and the secondary stroke starts at t 2 . when the secondary stroke is completed with the coil current at t 3 equaling zero, the drain volt age starts to oscillate at approximately the v in ? v out level. the peak to peak amplitude equals 2 ? v out . in tapped buck topology, this amplitude is multiplied by the ratio of the windings. a special feature, called valley detection is an in te grated part of the SSL2129AT circuitry. dedicated built-in circuitry c onnected to the drain pin, se nses when the voltage on the drain of the switch has reached its lowest va lue. the next cycle is then started at t 00 and as a result the capacitive switching losses ar e reduced. a valley is detected and accepted when both the frequency of the oscillations and the voltage swing are within the range specified (f ring and ? v vrec(min) ) for detection. ? v vrec(min) is the voltage differential between the hv (pin) in and the drain pin. if a valid valley is not detected, the secondary stroke is continued until the maximum off-time (t off(high) ) is reached, then the next cycle is started. a series resistance can be included at the drain sensing pin for flyback mode to remove the h igh-frequency ringing caused by the transformer leakage inductance. fig 4. waveforms and valley detection aaa-001744 demagnetization v in valley v gate v drain 0 0 i l v out magnetization 3 2 t 1 t 0 t 00 t 2 t 3 t 4 1
SSL2129AT all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 23 october 2012 7 of 21 nxp semiconductors SSL2129AT dimmable led controller ic 8.5 protective features the ic has the following protective features: ? undervoltage lockout (uvlo) ? leading-edge blanking (leb) ? overcurrent protection (ocp) ? internal overtemperature protection (otp) ? brownout protection ? led overtemperature control and protection ? an optional output overvoltage protection circuit is impl emented using external components and the ntc pin. the internal otp and led over temperature pr o t ections are safe-restart protections. the ic halts, causing v cc to fall lower than v cc(stop) , and instigates start-up. when v cc drops lower than v cc(rst) , the ic resets the latch protection mode. switching starts only when no fault condition exists. 8.5.1 undervoltage lockout (uvlo) when the voltage on the vcc pin < v cc(stop) , the ic stops switching. an attempt is then made to restart by supplying v cc from the hv pin voltage. 8.5.2 leading-edge blanking (leb) to prevent false detection of the short-windi ng or overcurrent, a blanking time following switch-on is implemented. when the mosfet switch turns on there can be a short current spike due to capacitive discharge of voltage over the drain and source. during the leb time (t leb ), the spike is disregarded. 8.5.3 overcurrent protection (ocp) the SSL2129AT contains a highly accurate peak current detector. it triggers when the voltage on the source pin reaches the peak level v th(ocp)source . the current through the switch is sensed using a resistor connect ed to the source pin. the sense circuit is activated following leb time t leb . as the led current is half the peak current (by design), it automatically provides protection for maximu m led current during operation. there is a propagation delay t d(ocp-swoff) between overcurrent detection and the actual closure of the switch. due to the delay, the actual peak curr ent is slightly higher than the ocp level set by the resistor in series to the source pin. 8.5.4 overtemperature protection (otp) when the internal otp function is triggered at a certain ic temperature (t th(act)otp ) , the converter stops operating. the otp safe-resta rt protection and the ic restarts again with switching resuming when the ic temperature drops below t th(rel)otp . 8.5.5 brownout protection brownout protection is designed to limit the lamp power when the input voltage drops close to the output voltage level. since the input power has to remain constant, the input current would otherwise increase to a level that is too large for the input circuitry. in the SSL2129AT, there is a maximum limit on the on-time of switch t on( high) .
SSL2129AT all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 23 october 2012 8 of 21 nxp semiconductors SSL2129AT dimmable led controller ic in buck mode, the rate of current rise in the coil during the on-phase is proportional to the difference between input voltage and output voltage. therefore, the peak current cannot be reached before t on (high) and as a result the average ou tput current to the leds is reduced. 8.6 t on control the t on(high) can be lowered by connecting a capacitor to the tonmod pin. the external capacitor is charged during the primary stroke with i tonmod . if the v tonmod level is reached before the t on(high) time, the switch is turned off and the secondary stroke starts. when a capacitor is not connected to the pin, v tonmod is reached quickly. shorter than the minimum limit of 1 ? s. in this case or when the tonm od pin is grounded, the internal time constant, t on(high) determines the maximum on-time. this function is used to control the converter operation over the mains cycle which enables the design of a mains dimmable driver. 8.7 vcc supply the SSL2129AT can be supplied using three methods: ? under normal operation, the voltage swin g on the drain pin is rectified using external components providing current towards the vcc pin ? at start-up, there is an internal current source connected to the hv pin. the current source provides internal power until an external current on the vcc pin provides the supply. ? using an auxiliary win ding, the voltage can be rectifie d and connected to the vcc pin. the ic starts up when the voltage at the vcc pin is higher than v cc(startup) . the ic locks out (stops switching) when the volt age at the vcc pin is lower than v cc(stop) . the hysteresis between the start and stop levels allows the ic to be supplied by a buffer capacitor until the external supply is settled. the SSL2129AT has an internal v cc clamp, which is an internal active zener (or shunt re gulator). this internal active zener limits the voltage on the supply vcc pin to the maximum value of v cc . if the maximum current of the supply minus the current consumption of th e ic (determined by the load on the gate drivers), is lower than the maximum value of i dd no external zener diode is needed in the supply circuit. 8.7.1 vcc regulator during supply dips, the input voltage can drop too low to supply the required ic current. under these conditions, if the vcc voltage drops lower than v cc(swon)reg level, a second regulator is started. its function is to fill in the required supply curr ent which the external supply does not deliver. it prevents the ic going into uvlo. when the vcc voltage is higher than v cc(swon)reg level, the regulator is turned off.
SSL2129AT all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 23 october 2012 9 of 21 nxp semiconductors SSL2129AT dimmable led controller ic 8.8 ntc functionality the ntc pin can be used as a control method for led thermal protection. when the voltage on the ntc pin is higher than v th(high)ntc , see figure 5 (4), the converter delivers nominal output current. when the voltage is lower than this level, the peak cu rrent is gradually reduced until v th(low)ntc is reached, see figure 5 (3). the peak current is now half the peak current of nominal operation. when v act(tmr)ntc is passed, see figure 5 (2), a timer starts to run to distinguish between the following situations: ? if the low-level v deact(tmr)ntc is not reached within time t to(deact)ntc figure 5 (1), led overtemperature is detected. the ic stops s witching and attempt s to restart from the hv pin voltage. restart takes place when the voltage on ntc pin is higher than v th(high)ntc , see figure 5 (4). it is assumed that the reduction in peak current did not result in a lower ntc temperature and led otp is activated. ? if the low-level v deact(tmr)ntc is reached within the time t to(deact)ntc figure 5 (1), it is assumed that the pin is pulled down externa lly. the restart function is not triggered. instead, the output current is reduced to zero. the output current rises again when the voltage is higher than v deact(tmr)ntc . 8.8.1 soft-start function the ntc pin can be used to make a soft start function. during switch-on, the level on the ntc pin is low. by connecting a capacitor (in parallel with the ntc resistor), a time constant can be defined. the time constant causes the level on the ntc pin to increase slowly. when passing level v th(low)ntc figure 5 (3), the convertor star ts with half of the maximum current. the outpu t cu rrent slowly increa ses to maximum when v th(high)ntc figure 5 (4) is reached. fig 5. ntc control curve 001aan700 2 3 4 5 i pk peak current i pk / 2 v th(ocp)source = 500 mv v th(ocp)source = 250 mv v ntc v th(high)ntc v th(low)ntc v act(tmr)ntc v deact(tmr)ntc 1
SSL2129AT all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 23 october 2012 10 of 21 nxp semiconductors SSL2129AT dimmable led controller ic 8.9 mains dimmer compatibility the SSL2129AT provides mains dimmer compatibility using dynamic t on control. this control is used to shape an input current waveform to provide the most effective current to load the dimmer over most of the mains cycle. in the dimmed position, the output current is controlled both by the conductive phase of the dimmer and the slope current control of the tonmod function. an additional advantage of this method is a high-power factor. the additional dimming range is achieved by mod u lating the charge current of the capacitor connected to the tonmod pin.
SSL2129AT all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 23 october 2012 11 of 21 nxp semiconductors SSL2129AT dimmable led controller ic 9. limiting values [1] an internal clamp sets the supply voltage and current limits. [2] human body model: equivalent to discharging a 100 pf capacitor through a 1.5 k ? s eries resistor. [3] charged device model: equivalent to charging the ic up to 1 kv and the subsequent discharging of each pin down to 0 v over a 1 ? ? r esistor. 10. thermal characteristics table 4. limiting values in accordance with the absolute maximum rating system (iec 60134). symbol parameter conditions min max unit general sr slew rate on pin drain ? 5 +5 v/ns p tot total power dissipation so8 package - 0.6 w t amb ambient temperature ? 40 +125 ?c t j junction temperature ? 40 +150 ?c t stg storage temperature ? 55 +150 ?c voltages v cc supply voltage continuous [1] ? 0.4 +14 v v drain voltage on pin drain ? 0.4 +600 v v hv voltage on pin hv current limited ? 0.4 +600 v v source voltage on pin source current limited ? 0.4 +5.2 v v ntc voltage on pin ntc current limited ? 0.4 +5.2 v currents i dd supply current on pin vcc - 20 ma v esd electrostatic discharge voltage human body mode l; (for all pins except drain and hv) [2] ? 2 +2 kv human body mode l for drain and hv ? 1 +1 kv charged device [3] ? 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; pcb: 2 cm ? ? 3 cm; 2-layer; 35 ? m cu per layer 15 9 k/w in free air; pcb: jedec 2s2p 89 k/w ? j-top thermal resistance from junction to top top package temperature measured at the warmest point on top of the case 0.49 k/w
SSL2129AT all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 23 october 2012 12 of 21 nxp semiconductors SSL2129AT dimmable led controller ic 11. characteristics table 6. characteristics symbol parameter conditions min typ max unit f conv conversion frequency - 100 - khz high-voltage i leak(drain) leakage current on pin drain v drain = 600 v - - 10 ? a i leak(hv) leakage current on pin hv v hv = 600 v - - 30 ? a supply v cc supply voltage operating range [1] 8 - 14 v v cc(startup) start-up supply voltage 11 12 13 v v cc(stop) stop supply voltage 8 9 10 v v cc(hys) hysteresis of supply voltage between v cc(startup) and v cc(stop) 2 - 4.5 v v cc(rst) reset supply voltage 4.5 5 5.5 v v cc(swon)reg regulator switch-on supply voltage 8.75 9.25 9.75 v v cc(swoff)reg regulator switch-off supply voltage 9.5 10 10.5 v v cc(reg)hys regulator supply voltage hysteresis v cc( swoff)reg ? ? v cc(swon)reg 0.3 - - v v cc(regswon-stop) supply voltage difference between regulator switch-on and stop v cc(swon)reg ? ? v cc(stop) 0.3 - - v consumption i stb(hv) standby current on pin hv during start-up or in protection; v hv = 100 v 300 350 400 ? a i cc (int) internal supply current normal operation - 1.3 - ma capability i sup(high)hv high supply current on pin hv standby: v hv = 40 v; vcc < v cc(stop) 1 1.3 1.6 ma regulator on: v hv = 40 v; vcc < v cc(swon)reg after start-up 2 2.3 2.6 ma current v th(ocp)source overcurrent protection threshold voltage on pin source ? v/ ? t = 0.1 v/ ? s 480 500 520 mv ? v/ ? t = 0.1 v/ ? s; v ntc = 0.325 v 230 250 270 mv t d(ocp-swoff) delay time from overcurrent protection to switch-off ? v/ ? t = 0.1 v/ ? s - 75 100 ns t leb leading edge blanking time overcurrent protection 260 300 340 ns valley detection (? v/ ? t) vrec valley recognition voltage change with time on pin drain ? 30 ? 20 ? 10 v/ ? s f ring ringing frequency [2] 200 550 1000 khz ? v vrec(min) minimum valley recognition voltage difference voltage drop on pin drain 15 20 25 v t d(vrec-swon) valley recognition to switch on delay time - 100 - ns
SSL2129AT all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 23 october 2012 13 of 21 nxp semiconductors SSL2129AT dimmable led controller ic [1] the maximum operating voltage at vcc can exceed 14 v. [2] this parameter is not tested during production, by design it is guaranteed brownout detection v th(tonmod) threshold voltage on pin tonmod 3.75 4 4.25 v i offset(tonmod) offset current on pin tonmod ? 37 ? 43 ? 48 ? a t on(high) high on-time 12.5 15 17.5 ? s driver (pin driver) i source(driver) source current on pin driver 1.5 ms maximum; v driver = 2 v - ? 0.195 - a i sink(driver) sink current on pin driver 20 ? s maximum; v driver = 2 v - 0.28 - a 20 ? s max imum; v driver = 10 v - 0.46 - a v o(driver)max maximum output voltage on pin driver vcc > v cc(startup) 9 10.5 12 v v o(driver)min minimum output voltage on pin driver vcc = v cc(stop) 6.5 7.5 8.5 v ntc functionality v th(high)ntc high threshold voltage on pin ntc 0.47 0.5 0.53 v v th(low)ntc low threshold voltage on pin ntc 0.325 0.35 0.375 v v act(tmr)ntc timer activation voltage on pin ntc 0.26 0.3 0.325 v v deact(tmr)ntc timer deactivation voltage on pin ntc 0.17 0.2 0.23 v t to(deact)ntc deactivation time-out time on pin ntc 33 46 59 ? s i offset(ntc) offset current on pin ntc - ? 47 - ? a temperature protection t th(act)otp overtemperature protection activation threshold temperature 160 170 180 ?c t th(rel)otp overtemperature protection release threshold temperature 90 100 110 ?c table 6. characteristics ?continued symbol parameter conditions min typ max unit
SSL2129AT all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 23 october 2012 14 of 21 nxp semiconductors SSL2129AT dimmable led controller ic 12. application information an led driver with the SSL2129AT can be a buck, tapped buck or flyback converter operating in bcm (see figure 7 ). the tapped buck option offers the advantage of larger duty factor and less peak cu rr ent through the mosfet switch, resulting in higher efficiency and higher converter ratio. the recommended voltage swing on the drain pin is limited by the ? v vrec(min) parameter. with a tapped buck configuration, this limitation is overcome enabling lower output voltages. it is recommended for 230 v applications that a tvs is placed after the rectifier bridge to limit maximu m vo ltage over the bus. in mains dimmable solutions, the bus voltage can become substantially higher than the nominal mains voltage without clamping because of line resonance and rectification. this can des troy the electrolytic capacitors, ic or mosfet. open string protection can be added using the auxiliary winding voltage to pull-down the ntc pin voltage. in addition, the tvs prevents voltage spikes due to for example lighting surges. further information can be found in the ssl 212 9at application note . fig 6. a typical mains dimmable buck 120 v (ac) SSL2129AT application bd1 mbs bsp89 f1 sqq 1 c1 0.22 f c2 0.22 f c4 1 f c3 470 f d1 es1f d3 in4148w l1 1 mh l2 470 h srr1210 r5 200 r4 84.5 k r3 q3 1.5 m c7 15 nf c5 220 pf 250 v c6 82 pf r6 9.1 q2 q1 fdd7n25 r1 0.43 u4 u7 u5 120 vac mov1 v150la1p rgnd r10 220 k ntc r7 d5 in4148w d2 esf1 d4 1n4148w d9 d6 2.4 v 2.2 k r8 226 k gnd 40 v 427 ma 8 7 6 5 1 u1 ic 2 3 4 hv vcc ntc source drain gnd tonmod driver aaa-005192
SSL2129AT all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 23 october 2012 15 of 21 nxp semiconductors SSL2129AT dimmable led controller ic fig 7. a typical mains dimmable tapped buck 230 v (ac) SSL2129AT application

SSL2129AT all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 23 october 2012 16 of 21 nxp semiconductors SSL2129AT dimmable led controller ic 13. package outline fig 8. package outline sot96-1 (sot8) unit a max. a 1 a 2 a 3 b p cd (1) e (2) (1) eh e ll p qz ywv references outline version european projection issue date iec jedec jeita mm inches 1.75 0.25 0.10 1.45 1.25 0.25 0.49 0.36 0.25 0.19 5.0 4.8 4.0 3.8 1.27 6.2 5.8 1.05 0.7 0.6 0.7 0.3 8 0 o o 0.25 0.1 0.25 dimensions (inch dimensions are derived from the original mm dimensions) notes 1. plastic or metal protrusions of 0.15 mm (0.006 inch) maximum per side are not included. 2. plastic or metal protrusions of 0.25 mm (0.01 inch) maximum per side are not included. 1.0 0.4 sot96-1 x w m a a 1 a 2 b p d h e l p q detail x e z e c l v m a (a ) 3 a 4 5 pin 1 index 1 8 y 076e03 ms-012 0.069 0.010 0.004 0.057 0.049 0.01 0.019 0.014 0.0100 0.0075 0.20 0.19 0.16 0.15 0.05 0.244 0.228 0.028 0.024 0.028 0.012 0.01 0.01 0.041 0.004 0.039 0.016 0 2.5 5 mm scale so8: plastic small outline package; 8 leads; body width 3.9 mm sot96-1 99-12-27 03-02-18
SSL2129AT all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 23 october 2012 17 of 21 nxp semiconductors SSL2129AT dimmable led controller ic 14. abbreviations table 7. abbreviations acronym description bcm boundary conduction mode leb leading-edge blanking led light emitting diode mosfet metal-oxide semiconductor field-effect transistor ocp overcurrent protection otp overtemperature protection pcb printed-circuit board pwm pulse-width modulation tvs transient voltage suppression uvlo undervoltage lockout zcs zero-current switching
SSL2129AT all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 23 october 2012 18 of 21 nxp semiconductors SSL2129AT dimmable led controller ic 15. revision history table 8. revision history document id release date data sheet status change notice supersedes SSL2129AT v.2 20121023 product data sheet - SSL2129AT v.1 SSL2129AT v.1 20120810 product data sheet - -
SSL2129AT all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 23 october 2012 19 of 21 nxp semiconductors SSL2129AT dimmable led controller 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 mu ltiple 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 wit h 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 ? 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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 t o 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, aut hori zed 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 prod uct s 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 pr oduct s 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 liabil i ty 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 th e absolute maximum ratings system of iec 60134) will cause permanent damag e 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 prod uct s 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 agre ement 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 co nstr ued 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 objec tive specif icati on for product development. preliminary [short] data sheet qualification this document contains data from t he preliminary specification. product [short] data sheet production this document contains the product specification.
SSL2129AT all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2012. all rights reserved. product data sheet rev. 2 ? 23 october 2012 20 of 21 nxp semiconductors SSL2129AT dimmable led controller ic export control ? this document as well as the item(s) described herein may b e 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 pro duct dat a 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 st at es 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 pro duct 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. translations ? a non-english (translated) version of a document is for ref e rence only. the english version shall prevail in case of any discrepancy between the translated and english versions. 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 SSL2129AT dimmable led controller 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: 23 october 2012 document identifier: SSL2129AT 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 . . . . . . . . . . . . . . . . . . . . . . 4 7.1 pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 7.2 pin description . . . . . . . . . . . . . . . . . . . . . . . . . 4 8 functional description . . . . . . . . . . . . . . . . . . . 5 8.1 introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 8.2 converter operation . . . . . . . . . . . . . . . . . . . . . 5 8.3 driver pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 8.4 valley detection. . . . . . . . . . . . . . . . . . . . . . . . . 6 8.5 protective features . . . . . . . . . . . . . . . . . . . . . . 7 8.5.1 undervoltage lockout (uvlo) . . . . . . . . . . . . 7 8.5.2 leading-edge blanking (leb) . . . . . . . . . . . . . 7 8.5.3 overcurrent protection (ocp) . . . . . . . . . . . . . 7 8.5.4 overtemperature protection (ot p) . . . . . . . . . 7 8.5.5 brownout protection . . . . . . . . . . . . . . . . . . . . . 7 8.6 t on control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 8.7 vcc supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 8.7.1 vcc regulator . . . . . . . . . . . . . . . . . . . . . . . . . . 8 8.8 ntc functionality . . . . . . . . . . . . . . . . . . . . . . . 9 8.8.1 soft-start function . . . . . . . . . . . . . . . . . . . . . . . 9 8.9 mains dimmer compatibility . . . . . . . . . . . . . . 10 9 limiting values. . . . . . . . . . . . . . . . . . . . . . . . . 11 10 thermal characteristics . . . . . . . . . . . . . . . . . 11 11 characteristics . . . . . . . . . . . . . . . . . . . . . . . . . 12 12 application information. . . . . . . . . . . . . . . . . . 14 13 package outline . . . . . . . . . . . . . . . . . . . . . . . . 16 14 abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . 17 15 revision history . . . . . . . . . . . . . . . . . . . . . . . . 18 16 legal information. . . . . . . . . . . . . . . . . . . . . . . 19 16.1 data sheet status . . . . . . . . . . . . . . . . . . . . . . 19 16.2 definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 16.3 disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 16.4 trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . . 20 17 contact information. . . . . . . . . . . . . . . . . . . . . 20 18 contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

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