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UCC256301重启

Other Parts Discussed in Thread: UCC256301

输入220V50Hz经整流滤波120UF电容给半桥单谐振电容LLC级供电。上电后,ucc256301重启且频率大于1Hz。输出电压只有设计电压的一半。示波器观察关键点波形发现VCR电压恒定为3V,ISENSE电压为0V。衰减10倍测谐振电容波形如下