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

关键词:电源管理 LED驱动器 AC/DC转换器 PFC

时间:2012-04-12 10:36:11       作者:Powerint       来源:LNK457DG

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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