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TPS43061输出电压几乎没变化

Other Parts Discussed in Thread: TPS43061

做了一个TPS43061的板子,按照TI的webench的设计,输入9-15v,输出20v,最大输出电流为2A;把板子焊接好,在12v输入电压下测试,发现输出始终是10.8v左右,TPS43061的HDRV引脚为10.8v,LDRV为0,求大家帮助