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开关电源单点接地



在layout时候总是有疑问:单点接地是电源模块的地都只在散热盘上添加地过孔,还是输入输出电容附近也要地过孔。

芯片的datasheet说的也不明白;

是针对不同的芯片有不同的做法?哪一种做法比较好?

希望能帮忙解答一下,谢谢!!