STEVAL-ILL044V1 9 W Triac dimmable, high power factor, isolated LED driver based on the HVLED815PF (for US market) Databrief Features +/- 5% primary-side current regulation, no optocoupler Fully isolated output Low component count Only 1 tight-tolerance component High efficiency, >86% High power factor >0.98 Low THD, < 20% over 90 V to 132 V range Fits in 28 mm tubing 9 W output, for light equal to range from 40 W to 60 W incandescent use of components. With the addition of a few Startup within 0.2 seconds extra components the HVLED815PF is made to draw near-sinusoidal input current from the AC Dimmable over 90 V to 132 V voltage range line. The circuit regulates LED current over a wide RoHS compliant range of line voltage and LED string voltage, and is dimmable with standard Triac-based dimmers. Description The STEVAL-ILL044V1 demonstration board showcases STs new LED driver chip, HVLED815PF. It solves the problem of low-cost drive circuitry for LED replacements for 40 W incandescent or equivalent compact-fluorescent lamps. The HVLED815PF is a new integrated power controller using primary-side control to achieve LED current regulation within +/-5%. (It also has primary-side voltage regulation, used here for open load protection). The device incorporates an 800 V avalanche- rated FET and fits in a standard SO-16 package. An internal startup circuit eliminates the need for external rapid-start circuitry. The PFC-flyback power converter operates in transition mode for the highest efficiency and best June 2012 Doc ID 023389 Rev 1 1/4 This is information on a product in full production. www.st.com 4CO DI MM HO ES FU TO TE N& + 2 &),- IN 2 U& + 2 2 7 /U , - 2 6 7 6C 3E BL 2 4 6 , 2 2 7 O PT /6 2 , .E M 2 5 2 2 7 /U AV 4 I6 Schematic diagram STEVAL-ILL044V1 1 Schematic diagram Figure 1. Schematic diagram P PX 6 (74 74( ,% ,% ,% ,% RGEEA U 6 & PTO S F DEDE YOONLR IO + 0 N AL ENTG 43 (4 &P O U TR ECT 6 6 3 9 AME RR- P& 6REFL6 + L R6EF XAU NIM ( Y IR,P MO 6 0R -- &U 3 0R RNAI 6( 0 ,% & C 2 . 32 3O U R CE . 3 . 6CC ),% 4: R AIN ),% R AIN - R AIN / - 0 6 CO M P R AIN . & N J AC USCARULEF BY ESTSTTILSUTE4 CTION + 7 6 &U &U 6 ) + + ) % (/+- 6 &U M O.2& 2ONENTS *P SH6I AY N DEGESDURE TAGNONI DL OTONK WNRIS RSI4ELBIIHS S .O ) 3-4 % ON &US EET /HIME - V 2/4 Doc ID 023389 Rev 1 IC