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TPS23880: PORT POWER POLICING issue

chentsu chung
Mastermind 6180 points
Part Number: TPS23880

Hi Team,

Customer test TPS23880 with VPWR 56V and 2 port PD was normal, but when the VPWR goes up to around 56.5V, TPS23880 shut down the power to PD, and getting normal if decrease VPRW to 56V.

After that, we found it failed at PORT POWER POLICING: Tovld and Icut_max.

And this also happen while testing by TPS23880EVM

Could you please help on this issue? Thank you.

Best regards,

C.T.

  • 0
    TI__Genius 15685 points

    Hi C.T,

    What's power consumption of the load? Please send me screen shots of the TPS23880EVM GUI under the 2 test conditions you described above. For the 56.5V condition, please expand the fault column to allow me get all the faults happened on the ports. Thanks.

    Best rgeards,

    Penny

  • 0 in reply to Penny Xu
    Mastermind 6180 points

    Hi Penny,

    I have checked with customer onside for this issus.

    Because they use resistive loading, so the increasing POE voltage makes the load current highir than 30W limitation.

    Issue fixed after using contant current loading.

    Best regards,

    C.T.