基于ICL8001G設(shè)計的準(zhǔn)諧振模式LED驅(qū)動技術(shù)

ICL8001G是準(zhǔn)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(dá)90%，工作電壓高達(dá)26V。本文介紹了ICL8001G主要特性和亮點，方框圖以及初級控制應(yīng)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(yīng)用電路圖[!--empirenews.page--]
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


圖3。EVAL-LED-ICL8001G-Bulb02演示板外形圖


圖4。EVAL-LED-ICL8001G-Bulb02演示板電路
EVAL-LED-ICL8001G-Bulb02演示板材料清單（BOM）：
[!--empirenews.page--]

圖5。EVAL-LED-ICL8001G-Bulb02演示板變壓器電路圖