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TPL0401A-10: 使用TPL0401A-10芯片没有应答位

Part Number: TPL0401A-10

如图,我使用TPL0401A-10芯片输出的电阻比值,作为LDO芯片的FB端的分压电阻,RHW/RWL=2.76,FB端的电压为0.8V,这样LDO输出为3V;主机给过来的IIC信号,发现没有应答位,是该线路配置不正确还是可能其他什么问题导致没有应答位的?