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TPS2378: 如何实现试用辅助电源时POE优先

Part Number: TPS2378
Other Parts Discussed in Thread: TPS23754, TPS23753,

现有需求使用TPS2378实现在辅助电源和POE供电情况下,POE优先供电,参考TPS23753或TPS23754实现方式测试,发现当使用辅助电源供电情况下,插上POE网线,POE握手供电后,TPS2378的内部NMOS工作不正常,导致后级电路功率无法升上去,电源反复启停,波动很大。