原标题：Infineon ICL8001G准谐振模式LED驱动方案

　　infineon公司的 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。

　　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 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