Infineon ICL8001G 9W離線LED照明解方案

作者：時間：2012-07-04 來源：網(wǎng)絡

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Infineon公司的ICL8001G采用準諧振工作模式的單級反激和PFC控制器,功率因素大于98%,LED驅動器效率高達90%,工作電壓高達26V,內置數(shù)字軟起動,初級PFC和調光控制采用精密的PWM.本文介紹了ICL8001G產品亮點和主要特性,方框圖,應用電路以及評估板EVAL-LED-ICL8001G-Bulb02特性,電路圖,材料清單和變壓器電路圖.

The ICL8001G employs quasi-resonant operation mode optimized for off-line LED lighting, especially dimmable LED bulbs for incandescent lamp replacement. Precise PWM generation enables primary control for phase cut dimming and high power factor PF>98%. Significant improved driver efficiency, up to 90%, compared to other conventional solutions. The product has a wide operation range (up to 26V) of IC voltage supply and lower power consumption. Multiple safety functions ensure a full system protection in failure situations. With its full feature set and simple application, the ICL8001G represents an outstanding choice for quasi-resonant flyback LED bulb designs combining feature set and performance at minimum BOM cost.

ICL8001G產品亮點:

? 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初級邊控制的應用電路圖

評估板EVAL-LED-ICL8001G-Bulb02

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.

圖3. 評估板EVAL-LED-ICL8001G-Bulb02外形圖

評估板EVAL-LED-ICL8001G-Bulb02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

評估板EVAL-LED-ICL8001G-Bulb02主要指標: