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POE受电设备双电源的解决方案

Other Parts Discussed in Thread: TPS23753, TPS23754

想用LM5073做,前端既有POE供电,又有直流24V供电,24V直流为主电源,POE为备电源。后端通过24-5V DC-DC,有没好的解决方案?另外LM5073的FAUX可以用来接24V电源嘛,非常感谢!!