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问题：基于TPS23754设计的POE电路，当掉电时，12V输出有两个反弹，测试波形发现，GATE和GATE2脚掉电以后过15m还会有波形，不知道什么原因？
如图，正常情况下掉完电后，GATE和GATE2波形会掉到0，但是隔了15m后又有两段波形，导致输出电压有反弹。
