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UCC28C43: 300W DC-DC电源，市场客诉无法充电，DCDC损坏，拆机后发现辅源控制不发波，辅源IC-UCC28C43损坏

user5840537
Prodigy 175 points
Part Number: UCC28C43


300W DCDC 24V输出 芯片用于模块内辅助电源控制
故障现象：市场客诉无法充电，DCDC损坏，拆机后发现辅源控制不发波，辅源IC UCC28C43损坏
测试结果：辅源IC供电管脚与GND阻值低，接近短路态
ABA结果：新IC更换后，发波正常，模块输出24V，更换为旧IC后，辅源不发波，模块无输出

辅源UCC28C43DR故障分析.pdf