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TPS5430发烫

Other Parts Discussed in Thread: TPS5430

您好,最近调试TPS5430发现上电后5430很烫,一段时间后就开始过热保护,不断的跳电流。输入24VDC,输出5VDC,电流0.1A,但是用的续流二极管是B310,3A/40V的,100uH电感220uf电容。不知道是不是这个续流二极管的原因。第9脚已经接地,PH也做了个大面积铜箔。谢谢