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TPS23861: Is TPS23861EVM tested with UPoE compliant device.

Jagdish Karamchandani
Expert 1420 points
Part Number: TPS23861
Other Parts Discussed in Thread: TPS2378EVM-602

Hi TI Support,

I got to know from various forums that TPS23861EVM design can support CISCO UPoE standard by using 2 ports of TPS23861. Pertaining to this I have following queries,

1. Has TI carried out testing with CISCO UPoE device with TPS23861EVM evaluation board?

2. If yes, can its testing results be shared with us?

Thanks,

jagdish

  • 0
    TI__Genius 15655 points
    Hi Jagdish,

    Since UPoE is a non standard high power PoE solution, there's no compliance testing available like Sifos test(IEEE802.3at compliance test).There are 2 kinds of UPoE solutions: Forced UPoE and LLDP. LLDP is implemented through data link layer and it is a system level solution. Forced UPoE can simply implemented with TPS23861 in auto mode. We have TPS2378EVM-602 which is a forced UPoE PD solution. Our team is only doing the power side but we have customers using TI PSE in their LLDP systems. In addition, our PSE devices are used in many Cisco switches, so it works well in UPoE systems.

    Best regards,
    Penny
  • 0 in reply to Penny Xu
    Expert 1420 points

    Hi Penny,

    Thanks for your response. Please find below our further queries,

    1. So you mean LLDP could be implemented in networking layer of application & many customers have done so? Do I understand correct?

    2. Can CISCO UPoE device (already in field) with LLDP, able to communicate with TPS23861 based PSE which is forced mode? Please advice. 

    Thanks,

    jagdish

  • 0 in reply to Jagdish Karamchandani
    TI__Genius 15655 points

    Hi Jagdish,

    Yes, many customers are doing LLDP with our PSE. There's no majack stuff in PSE to enable LLDP. The LLDP communication is done by embedded processors and PSE side and PD side. Then the processor controls the PSE through I2C to set the power limit. Any kind of micro controller or processor can communicate with our PSE as long as it have I2C capability. 

    Best regards,

    Penny

  • 0 in reply to Penny Xu
    Expert 1420 points
    Hi Penny,

    Thanks for this clarification.

    Regards,
    jagdish