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UCC28060带不起负载

Other Parts Discussed in Thread: UCC28060

在设计一款UCC28060交错式PFC,1000W,在计算电感是100UH,匝比是8:1,但是装上去试反而工作不正常,电感有响声,带不起负载。电感换成300UH时,匝比也是8:1,工作正常了,但是只能带500W负载,带往上带电感就很想了,调整过流也是没有觖决。请问大侠是什么问题?官方的计算EXCIL也是100UH的感量。