Fairchild FL7701智能LED灯驱动解决方案
Fairchild公司的FL7701是带PFC功能的智能LED灯驱动器,内置了高压自偏置电路,输入电压范围80VAC ~ 308VAC,带自动重起模式的AOCP功能,内置超温保护功能,主要用于装饰LED灯和低功率LED灯.本文介绍了FL7701主要特性,方框图,典型和高压应用电路以及带和不带电解电容的应用电路,2.4W LED镇流器电路图,材料清单和PCB布局图.
The FL7701 LED lamp driver is a simple IC with PFC function. The special “adopted digital” technique of the IC can automatically detect input voltage condition and send an internal reference signal for achieving high power factor. When AC input is applied to the IC, PFC function is automatically enabled. Otherwise, when DC input is applied to the IC, PFC function is automatically disabled. The FL7701 does not need a bulk capacitor(electrolytic capacitor) for supply rail stability, which can significantly affect to LED lamp system.
FL7701主要特性:
Digitally Implemented Active PFC Function (No Additional Circuit Necessary for High PF)
Built-in HV Supplying Circuit: Self Biasing
Application Input Range :80VAC ~ 308VAC
AOCP Function with Auto-Restart Mode
Built-in Over-Temperature Protection Function
Cycle-by-Cycle Current Limit
Current-Sense Pin Open Protection
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