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TPS23754: TPS23754 protection mechanism

Lucifer
Expert 2600 points
Part Number: TPS23754

Dear Sir,

I am studying TPS23754 POE-PD solution and will use TPS23754EVM-383 as our prototype board.  But  may I know the TPS23754 protection mechanism? when  over current occur, how is the behavior of TPS23754? will it hiccup or shutdown?

Since we need to send a signal to MCU while TPS23754 failure occur. How do we get this signal? or should we add external circuit? Thanks.

  • 0
    TI__Mastermind 41790 points
    Hi Lucifer,

    Typically, the converter's current limit will be the first line of defense for a fault on the output load. In this case, the converter will hiccup. Next will be the PSE's current limit in which the PSE will foldback or shutdown. Lastly, depending how fast the fault is, the PD as a current limit in which the VDD/RTN voltage will foldback or go into inrush as shown in it's datasheet.

    Since there is multiple points of the protection, it'll be difficult to choose any particular one to feed a signal to flag a fault. Is the MCU on the load side? How will it process a fault if for example there is short on the output and there is no regulated power on the MCU?
  • 0 in reply to Darwin Fernandez
    Expert 2600 points
    Hi Darwin,
    The MCU i s a core chip of the platform. it will collect all system information for user. therefore we need a indicated signal to show the TPS23754 working status. Thanks.