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降级器、
我们使用 TPS2378+tps54561 来设计 PD。
插入 802.3at PSE 时、tps2378可以正常工作、 但 插入 802.3af PSE 时、它将无法工作、无法获得 PSE 的输出48V、Pls 对此提供帮助、谢谢!