基于ICL8001G設計的準諧振模式LED驅(qū)動技術

ICL8001G是準諧振模式LED驅(qū)動器，精密的PWM可用于相位調(diào)光，功率因素大于98%，效率高達90%，工作電壓高達26V。本文介紹了ICL8001G主要特性和亮點，方框圖以及初級控制應用電路圖和EVAL-LED-ICL8001G-Bulb02演示板主要特性，電路圖，材料清單和變壓電路圖。

ICL8001G 產(chǎn)品亮點：

• Quasi-Resonant Control For Highly Efficient LED 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

圖1。ICL8001G方框圖

圖2。ICL8001G初級控制應用電路圖