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求教:有源钳位正激同步整流

Other Parts Discussed in Thread: UCC27201, TPS28225, UCC27528, UCC24610

有源钳位正激自驱动空载功耗太大,TI有没有IC驱动的方案?或者有没办法在轻载是关闭同步整流?

还有,参考设计PMP4844中的同步整流驱动有什么优势?