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TPS23861 AUTO模式连接不上PD

Other Parts Discussed in Thread: TPS23861

1、买了TPS23861的PSE,I2C控制的,可以给PD(IEEE802.3af标准)设备供电。

2、按照datasheet的原理图,元器件参数也是一样,改成AUTO模式,供电不上,请帮忙分析一下原因。