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想分别设计20W 30W 40W,3款LED隔离电源

Other Parts Discussed in Thread: PMP4448, TPS92074, TPS92314, UCC28810

如题,要求是 效率要>88  PF>0.9   无频闪,有没有成本低 性价比比较高的芯片和方案推荐?