Powerint LNK419EG 40.5W街灯LED照明解决方案(DER－340)
Powerint公司的LinkSwitchTM-PH系列是LED驱动器系列,单级PFC,初级恒流控制,可选择TRIAC调光/不调光,不需要光耦和电流检测电路.器件集成了725V功率FET,连续模式PWM控制器,用于自偏压的高压开关电流源,频率抖动和保护电路,从大局出发大大简化了离线LED驱动器,主要用于离线LED驱动器.本文介绍了LinkSwitch-PH系列产品亮点,方框图,14W和7W LED驱动电路图,以及采用LNK419EG的40.5W街灯LED照明电路参考设计主要特性和指标,电路图,材料清单和PCB元件布局图.
The LinkSwitch-PH dramatically simplifies implementation of LED drivers requiring long lifetime, high efficiency, PF >0.9, and TRIAC dimming capability (LNK403-410). The single-stage combined power factor and constant-current controller eliminates a switching stage and the electrolytic bulk capacitor. The advanced primary-side control used by the LinkSwitch-PH device provides accurate constant current control while eliminating the need for an optocoupler and current sensing circuits.
LinkSwitch-PH incorporates a 725 V power FET, a continuous-mode PWM controller, a high-voltage switched current source for self biasing, frequency jittering, protection circuitry including cycle-by-cycle current limit and hysteretic thermal shutdown.
LinkSwitch-PH系列产品亮点:
Dramatically Simplifies Off-line LED Drivers
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