Powerint LNK454DG RDR268超小型LED驱动方案
Powerint 公司的RD-268是采用LinkSwitchTM-PL系列LNK454DG的1.1W PFC LED驱动器(非绝缘)参考设计,单路恒流输出366mA,LED电压3.0V,通用85 VAC到265 VAC, 47 Hz 到63 Hz输入,功率系数大于0.85,THD小于25%,具有很小的尺寸,可以装入枝状大烛台的有限空间.本文介绍了LinkSwitch-PL系列产品的亮点, 功能方框图, 典型应用电路图, 替代A19白炽灯的5W 15V LED驱动电路以及采用LinkSwitchTM-PL系列 LNK454DG的1.1W PFC LED驱动器(非绝缘)参考设计RD-268电路图和材料清单(BOM).
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
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