STEVAL-ILL037V1 Demonstration board for the HVLED805 IC for LED power supply Data brief Features Input voltage: 90 Vac - 265 Vac Input frequency: 50 Hz - 60 Hz Output power: 3.2 W Expected efficiency: 85% Output voltage: ~16 Vdc (from 3 to 5 LEDs) Output current: 200 mA For E26/E27/GU10 LED lamps RoHS compliant Description STEVAL-ILL037V1 The STEVAL-ILL037V1 demonstration board implements a 3.2 W (16 V / 0.2 A) wide range LED driver to support from 3 to 5 LEDs for LED lamps (e.g. E27 and GU10). The HVLED805 is an offline all-primary sensing switching regulator, specific to offline LED drivers, based on quasi-resonant ZVS (zero voltage switching at switch turn-on) flyback topology, due to its simplicity and low cost. April 2011 Doc ID 018708 Rev 1 1/4 For further information contact your local STMicroelectronics sales office. www.st.com 4 Circuit schematic STEVAL-ILL037V1 1 Circuit schematic Figure 1. Circuit schematic - - &21 &21 - - &21 &21 & & X)B ,3 X)B ,3 5 5 .B .B 1 6736 / 8)B60%6736 / 8)B60% & & QB ,3 QB ,3 3 7 7 37<7516)05 37<7516)05 5 5 .B .B & & Q)B Q)B 677+ / B60%677+ / B60% 1 3 1 & 1 1 1 5 ,1 5 ,1 5 ,1 5 ,1 & & X)B ,3 X)B ,3 +9/( +9/( B B 55 6285&( 6285&( 9&& *1 ,/( 0* &203 1 88 5 5 5 5 .B1& .B1& X+B ,3 X+B ,3 9&& // 3 & & X)B ,3 X)B ,3 1 1 Q) Q) Q) Q) && 1 B B B B X)B X)B & & & & Q) Q) 55 55 55 && 55 & & Q) Q) 9&& % % %5 B ,3%5 B ,3 B ,3 B ,3 ) ) - - - - &21 &21 &21 &21 - 6 2/4 Doc ID 018708 Rev 1