Powerint LNK403EG 8W TRIAC调光LED驱动方案

Powerint公司的LinkSwitch-PH系列集成了725V功率MOSFET，连续模式PWM控制器，用于自偏压的高压开关电流源，频率抖动，逐个周期的限流和带滞后的热关断电路，从而简化了功率因素大于0.9，TRIAC调光和高效率LED驱车器的设计。主要用于离线LED驱动器。本文介绍了LinkSwitch-PH系列（LNK403-409EG/413-419EG）主要特性，功能方框图，7W和14W LED驱动电路图以及采用LNK403EG的TRIAC调光 8W LED驱动器参考设计电路图，材料清单以及变压器相关资料。

TRIAC Dimmable 8 W LED Driver Using LinkSwitchTM-PH LNK403EG Compatible with High Power Dimmers

LNK403-409EG/413-419EG LinkSwitch-PH Family

The LinkSwitch-PH dramatically simplifies implementation of LED drivers requiring PF >0.9, TRIAC dimmer capability (LNK403-409) and high efficiency. The single-stage PF and constant current controller eliminates passive circuitry required for power factor correction and electrolytic bulk capacitor. The advanced primary-side control techniques used by the LinkSwitch-PH device provide accurate constant current control while eliminating the need for an optocoupler and secondary-side current control circuitry.
..

查看全文