Infineon公司的 ICL8001G是準諧振模式LED驅動器，精密的PWM可用于相位調光，功率因素大于98%，效率高達90%，工作電壓高達26V。本文介紹了ICL8001G主要特性和亮點，方框圖以及初級控制應用電路圖和EVAL-led-ICL8001G-Bulb02演示板主要特性，電路圖，材料清單和變壓電路圖。

　　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初級控制應用電路圖

　　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)：

　　圖5。EVAL-LED-ICL8001G-Bulb02演示板變壓器電路圖