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LM5002纹波问题

Other Parts Discussed in Thread: LM5002

我使用LM5002把12V升压为48V,单路如下图。

负载是MIC(麦克风),电流最大十几mA,现在的问题是纹波比较大,接近10V(波形如下),请帮忙分析一下原因。谢谢!