基于ICL8001G设计的准谐振模式LED驱动技术

2011-10-25 19:16:35来源: 互联网
rtup 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

关键字:ICL8001G  准谐振  LED

编辑:神话 引用地址:http://www.eeworld.com.cn/mndz/2011/1025/article_12551.html
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