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TPS40193输出电压问题咨询

Other Parts Discussed in Thread: TPS40193

 你好,TPS40193原理图如上,正常应该会输出1.0V的电压,但是实际用万用表量的输出电压是1.17V,负载最大电流大概9A,烦请帮忙看下是什么原因?谢谢