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TPS7A94: 电压无法调

Part Number: TPS7A94
之前在官网上订购了10PCSTPS7A9401DSCR 这款产品现在贴了5PCS其中1PCS可以通过可调电阻去调节输出电压,另外4PCS在调节电阻大小时电压没有变化,麻烦看看是什么情况