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BQ24650输出电压为0.空载输出电压也为0,求帮忙看一下



输入电压6.3V,设计的输出电压是3.7V,但是现在REF3.3V,MPPSET1.2V,但是输出电压没有,原理图是参照TI给的用户手册设计的