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AMC1301: 使用异常

Part Number: AMC1301

电路图如下,使用多个AMC1301电路,为同一电源。图1 A与B 为200V直流电源。图2Ver为1.25V。现发现在使用中当图1中接口没接如何东西,有的AMC1301会输出2.42V .请问这是什么问题,电路需要改进吗?图1接口为负载接口。盼回复 谢谢。