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。
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Hi
确认一下你的辅助电源是多少? 如果比POE正常供电低很多,需要确认变压器的设计。