[原创] Powerint LNK460KG元件最少的T8 20W/85VLED驱动方案(DER－345)

Powerint公司的T8管20 W/85 V LED驱动器是采用LinkSwitchTM-PL系列的 LNK460KG器件,所用元件数量最少,效率大于87%,功率因素大于0.98,A-THD小于10%,输出功率20W,可替代T8管灯.本文介绍了LNK460KG主要特性,框图,典型应用电路,替代A19白炽灯的5W/15V LED驱动器电路图,以及采用LNK460KG的T8 20W/85V LED驱动器主要特性和技术指标,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
..

查看全文