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TPS23861EVM-612: PSE to power pair connections

Michael Balourdas
Expert 5445 points
Other Parts Discussed in Thread: TPS23881EVM-008

Is there a reason VPWR is tied to RJ45 3/6 and PSE_N1 is tied to RJ45 1/2?  I understand that with diode bridge on other side it doesn’t really matter. The 4-pair also doesn’t seem standard.

Thanks,

Michael

  • 0
    TI__Genius 15685 points

    Hi Michael,

    Based on IEEE802.3at standard, you can use either MDI-X or MDI for alternative A wiring. We just chose MDI-X for TPS23861EVM. The 4 pair ports were designed for UPoE high power applications. 

    As you may know, now IEEE802.3bt has been released to support 4 pair 90W. You can look at TPS23881EVM-008 if you ware interested. Thanks.

    Best regards,

    Penny