Powerint LNK409EG高效25W离线LED驱动参考设计DER285
Powerint公司的高效非隔离的25W离线LED驱动参考设计是采用LinkSwitch-PH系列的LNK409EG器件,能以350mA驱动72V LED串,输入电压范围从180 VAC到265 VAC,功率因素大于0.9,效率大于90%,在230VAC时的THD小于20%,和IEC61000-3-2兼容.本文主要介绍了参考设计DER285主要特性, 驱动器电源指标和参考设计电路图,材料清单和PCB布局图.
25 W Non-Isolated, Buck-Boost Topology, Power Factor Corrected, LED Driver Using LinkSwitchTM-PH LNK409EG
The document describes a non-isolated, power factor corrected, low THD, high-efficiency LED driver designed to drive a 72 V LED string at 350 mA from an input voltage range of 180 VAC to 265 VAC.
The LinkSwitch-PH has been developed to cost effectively design a highly efficient single-stage power factor corrected LED driver with primary-side constant current control.
The LinkSwitch-PH controller was optimized for LED driver applications with minimal external parts count and control of the output current through the LED load without the use of an optocoupler.
The LinkSwitch-PH monolithically integrates the 725 V power MOSFET and controller.
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