</a>LED" title="LED">LED" title="LED">LED驅動器效率高達90%,工作電壓高達26V,內置數字軟起動,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:


圖4. 評估板EVAL-LED-ICL8001G-Bulb02電路圖

評估板EVAL-LED-ICL8001G-Bulb02材料清單:


圖5. 評估板EVAL-LED-ICL8001G-Bulb02變壓器電路圖
詳情請見:
http://www.infineon.com/dgdl/Datasheet_ICL8001G+vers+1.pdf?folderId=db3a304316f66ee801178c31a9af054a&fileId=db3a3043271faefd01273dce7b0e68f6
和
http://www.infineon.com/dgdl/Application_Note_ICL8001G.pdf?folderId=db3a304316f66ee801178c31a9af054a&fileId=db3a304326dfb1300126f4b3aeac1838