电路没有接电池,vbus接到5V直流电源,
用万用表表测sys端电压,电压不停波动,大约2v~4.2v
然后我测量了sw端的频率发现频率时有时无这是什么原因呢?拜托了~~
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电路没有接电池,vbus接到5V直流电源,
用万用表表测sys端电压,电压不停波动,大约2v~4.2v
然后我测量了sw端的频率发现频率时有时无这是什么原因呢?拜托了~~