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TPSM82902: 电源输出异常,输入12V,输出为12V(有的板子一开始输出会在6V)

Part Number: TPSM82902

设计输入12V,输出4.5V原理图如下,

设计参考官方参数

测试后输出电压异常,调节输入输出电阻输出电压如下