基于ICL8001G设计的准谐振模式LED驱动技术

ICL8001G是准谐振模式LED驱动器，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ICL8001G主要特性和亮点，方框图以及初级控制应用电路图和EVAL-LED-ICL8001G-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 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

图1。ICL8001G方框图

图2。ICL8001G初级控制应用电路图
EVAL-LED-ICL8001G-Bulb02演示板

EVAL-LED-ICL8001G-Bulb02 Quasi-Resonant Flyback Converter for Phase Cut Dimming with High Power Factor

The EVAL-LED-ICL8001G-Bulb02 demonstrates the single-stage flyback and PFC controller ICL8001G in an LED Bulb application. Its quasiresonant operation mode, primary side control, integrated PFC and phase-cut dimming control makes it the best in class system solution for dimmable LED bulbs.

EVAL-LED-ICL8001G-Bulb02演示板主要特性：

•High, stable efficiency over wide operating range through quasiresonant operation mode

•Primary side side flyback control with integrated PFC and phase-cut dimming

•Energy efficient phase cut dimming

•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- and under-voltage lockout

•Auto restart mode for short circuit protection

•Adjustable latch-off mode for output overvoltage protection

•Best in class system BOM for dimmable bulbs


图3。EVAL-LED-ICL8001G-Bulb02演示板外形图


图4。EVAL-LED-ICL8001G-Bulb02演示板电路
EVAL-LED-ICL8001G-Bulb02演示板材料清单（BOM）：


图5。EVAL-LED-ICL8001G-Bulb02演示板变压器电路图