Powerint LNK457DG 7W B10 LED灯电源方案(DER324)

Powerint公司的7W B10 LED灯电源采用LinkSwitch-PL系列的LNK457DG，具有单级PFC和精确的恒流（CC）输出以及低成本元件少与小尺寸的特点，AC输入电压90V-132V，115VAC时的效率大于90%，PF大于0.95，集成了无负载检测/短路保护，热关断自动恢复，可替代B10白炽灯。本文介绍了LinkSwitch-PL系列产品亮点，方框图，典型应用电路以及7W PFC LED驱动器指标，电路图，材料清单和PCB布局图。

The LinkSwitch-PL family enables a very small and low cost single-stage power factor corrected constant current driver for solid state lighting. Optimized for direct LED current sensing, the LinkSwitch-PL operates over a wide input voltage range delivering an output power of up to 16 W. The LinkSwitch-PL control algorithm provides flicker-free TRIAC dimming with minimal external components.

Each device incorporates a 725 V rated power MOSFET, a novel discontinuous mode variable frequency variable on-time controller, frequency jitter, cycle by cycle current limit and hysteretic thermal shutdown in a monolithic 4-pin IC, available in SO-8C, eSOP-12, and eDIP-12 packages.

LinkSwitch-PL系列产品亮点：

Dramatically Simplifies Off-line LED Drivers

• Flicker-free phase-controlled TRIAC dimming

• Single stage power factor correction and accurate constant current (CC) output
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