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TPS23756: CS communication failed

Sara Jia
Expert 2975 points
Part Number: TPS23756

Hi Sir,

My ctm uses tps23756 as their poe source. when start poe func, the cs mesh port communicates failed.

we doubt because of  the unsuitable design of  the voltage transformer,would you pls give some recommendations on this issue?

BR

Sara

  • 0
    TI__Mastermind 21320 points

    Hello Sara,

    I can speak to the operation of the TPS23756. I cannot speak to the data or communication protocols. At a high level, if the power path is interrupting the data path, it sounds like there is an isolation issue. Whether that is grounding, signal path or some sort of coupling would take some debug work to validate.

    One way to control the ramp is to increase the input bulk capacitance, which will slow down the turn on time. I would encourage you to work with the PHY vendor support system as well to get multiple debug angles on it. 

    If this post answers your question, please indicate so by marking this thread as resolved. Thank you.

     

    Regards, 

     

    Michael P.

    Applications Engineer

    Texas Instruments 

  • 0 in reply to Michael Pahl
    TI__Mastermind 21320 points

    Hello,

    This thread has not had a post in a few weeks. I am going to close it, but feel free to reopen it by posting a reply. Or, you can open a new thread. 
    Thank you.

    Regards,

    Michael Pahl