EVALHVLED805 4.2W离线LED驱动应用电路

EVALHVLED805是HVLED805 PWM电流模式LED驱动器的演示板,是 4.2W离线LED驱动器.输入电压VIN从185到265 VAC,火线频率50-60Hz,最大输出功率4.2W,最大电压12V,输出电流350 mA ± 5%,正常模式的开关闭频率大于70kHz,平均效率大于70%,无负载的最大输入功率小于100W.

图1.EVALHVLED805外形图

EVALHVLED805主要特性:

■ Input voltage range (VIN): 185 - 265 VAC

■ Main frequency (fL): 50 - 60 Hz

■ Maximum (rated) output power: 4.2 W

■ Output: IOUT = 350 mA ± 5%

– Over voltage = 12 V max

– Current ripple 10% IOUT

■ Minimum switching frequency in normal mode: 70 kHz

■ Target average efficiency (from 1 to 3 LEDs) 70 %

■ Maximum input power in no-load 100 mW

图2.EVALHVLED805电路图

EVALHVLED805材料清单(BOM):