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TPS54622输出1.2V异常

Other Parts Discussed in Thread: TPS54622

我用TPS54622搭建一个电路,输入12V,输出1.2V/2A,但是输出0V,我测量了一下SS_TR和RT_CLK管脚电压,均为0,这是不是说明了芯片坏了,或芯片焊接有问题?麻烦帮我分析一下,谢谢!