1. general description the SSL2109AT 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 (application dependent) ? ease of integration and many protection features ? low electronic bill of material (bom) ? 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 is supplementary to the ssl21081/ssl21083 series but without an internal switch. th e ic h as been designed to start up directly from the hv supply by an internal high-voltage current source. thereafter, the dv/dt supply is used with capacitive coupling from the drain, or any other auxiliary supply. th is functionality provides full flexibility in the application design. an internal clamp limits the supply voltage. the ic provides accurate output current control to within 5 % led current accuracy. the ic can be operated using pulse-width modu lation (pwm) current regulation and has many protection features includi ng easy led temperature feedback. 2. features and benefits ? led driver ic for driving strings of leds or high-voltage led modules from a rectified mains supply ? par t of a high-efficiency switch mode flyback or buck product family. ? driver -only which can drive an external mosfet ? drive r that has power-efficient bounda ry conduction mode of operation with: ? no reverse recovery loss es in fre ewheel diode ? zero current switching (z cs) for switch turn-on ? zero volt age or valley swit ching for switch turn-off ? min imal required inductance value and size ? su itable for high power factor (>0.9) applications ? ap plicable in buck, buck/boost and flyback topologies SSL2109AT compact non-dimmable led driver ic rev. 5 ? 3 october 2013 product data sheet
SSL2109AT all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2013. all rights reserved. product data sheet rev. 5 ? 3 october 2013 2 of 20 nxp semiconductors SSL2109AT compact non-dimmable led driver ic ? direct pwm current regulation possible ? fa st transient response through cycle-by-cycle current control: ? negligible a c mains ripple in led curr ent and minimal total capacitance in low ripple configurations ? no over or undershoots in the led current ? sim ple high input power factor solution (>0.9) ? in ternal protection features: ? un dervoltage lockout (uvlo) ? l eading-edge blanking (leb) ? ov ercurrent protection (ocp) ? in ternal overtemperature protection (otp) ? br ownout protection ? output shor t protection (osp) ? lo w component count led driver solution (see f igure 3 ): ? ea sy external temperature protection with a single ntc ? option for sof t-start function ? 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 3. applications the SSL2109AT is intended for compact led lamps with accurate fixed current output for single mains input voltages. mains input voltages include 100 v, 120 v and 230 v (ac). the o utput signal can be modulated using a pwm signal. external components determine the power range. 4. quick reference data [1] an internal clamp sets the supply voltage. the current into the vcc pin must not exceed the maximum idd value (see table 4 ) table 1. quick reference data symbol parameter conditions min typ max unit v cc supply voltage operating range [1] 8 - 16 v i cc(int) internal supply current normal operation - 1.3 - ma v hv voltage on pin hv ? 0.4 - + 600 v v drain voltage on pin drain ? 0.4 - + 600 v f conv conversion frequency - 100 - khz v o(driver)max maximum output voltage on pin driver v cc > v cc(startup) 9 10.5 12 v
SSL2109AT all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2013. all rights reserved. product data sheet rev. 5 ? 3 october 2013 3 of 20 nxp semiconductors SSL2109AT compact non-dimmable led driver ic 5. ordering information 6. block diagram table 2. ordering information type number package name description version SSL2109AT so8 plastic small package outline body; 8 leads; body width 3.9 mm sot96-1 fig 1. SSL2109AT block diagram d d d 1 7 & ) 8 1 & |