Infineon公司的ICL8001G采用准谐振工作模式的单级反激和PFC控制器,功率因素大于98%,LED驱动器效率高达90%,工作电压高达26V,内置数字软起动,初级PFC和调光控制采用精密的PWM.本文介绍了ICL8001G产品亮点和主要特性,方框图,应用电路以及评估板EVAL-LED-ICL8001G-Bulb02特性,电路图,材料清单和变压器电路图.
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初级边控制的应用电路图
评估板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.
图3. 评估板EVAL-LED-ICL8001G-Bulb02外形图
评估板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
评估板EVAL-LED-ICL8001G-Bulb02主要指标:
图4. 评估板EVAL-LED-ICL8001G-Bulb02电路图
评估板EVAL-LED-ICL8001G-Bulb02材料清单:
图5. 评估板EVAL-LED-ICL8001G-Bulb02变压器电路图
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