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TPS56221静态电流,空载的时候有时候电流不一样

Other Parts Discussed in Thread: TPS56221

TPS56221空载的时候上电会出现不一样的电流,放一会上电空载电流是110MA,一直保持是110ma。关了再开,静态电流是60MA,一直保持不变。为什么会静态电流不一样?输入是12V,输出是8V,每次上电输出电压都是对的