基于ICL8001G设计的准谐振模式LED驱动技术

是准器，精密的PWM可用于相位调光，功率因素大于98%，效率高达90%，工作电压高达26V。本文介绍了主要特性和亮点，方框图以及初级控制应用电路图和EVAL---Bulb02演示板主要特性，电路图，材料清单和变压电路图。

ICL8001G 产品亮点：

• Quasi-Resonant Control For Highly Efficient Driving Solutions

• Primary Side Flyback Control With Integrated PFC And Phase-Cut Dimming

• Integrated HV Startup Cell For Short Time To Light

• Best In Class System BOM For Dimmable LED Bulb

ICL8001G主要特性：

• High, stable efficiency over wide operating range

• Optimized for trailing- and leading-edge dimmer

• Precise PWM for primary PFC and dimming control

• Power cell for Vcc pre-charging with constant current

• Built-in digital soft-start

• Foldback correction and cycle-by-cycle peak current limitation

• VCC over/ under-voltage lockout

• Auto restart mode for short circuit protection

• Adjustable latch-off mode for output overvoltage protection

图1。ICL8001G方框图

图2。ICL8001G初级控制应用电路图