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TPS2378: Non-isolated PoE Buck Converter for 24V/0.5A output.

Sam mishra
Prodigy 120 points
Part Number: TPS2378
Other Parts Discussed in Thread: LM5576, PMP10812,

Hi,

I have referred  PMP10812- Class 2 Non-isolated PoE Buck Converter (5V/1A) Reference Design.

http://www.ti.com/tool/PMP10812

http://www.ti.com/lit/df/tidrtg6/tidrtg6.pdf

But my design requirement is 24V/0.5A output.

I have designed DC-DC buck converter with IC- LM5576 for 30-60V input and 24V/0.5A output using Webench utility.


Can I use PMP10812 reference design with an above DC-DC converter to make my board POE enabled?

If Yes, what designing parameter should I consider while using IC- LM5576 design with the PMP10812 reference design.

If no, why?

Your early replay most appreciated. 

Thanks and regards,

Mishra.

  • 0
    TI__Expert 5615 points

    Greetings Mishra.

    As your question came in over the weekend, it will be looked at by our application engineer on Monday morning US time.

    Your 24V requirement is not associated with the traditional end equipment that has adopted PoE in the past.  We are seeing more and more requests like yours and am interested to know the end equipment.  Might it be professional audio or video equipment?

    Thank you for considering PoE products from TI,

  • 0 in reply to Thomas Lewis
    TI__Mastermind 41195 points

    Hi Mishra,

    If you're asking if you can pair the TPS2378 with your above buck converter, the answer is yes. The PoE PD front end design will be the same and you can replace your buck design with the buck design in the reference design.

    I highly recommend you connect the CDB pin to the SD pin of your buck design.

    Also I recommend if an adapter is not used, you pull down APD pin to RTN.

    Thanks!

    Regards,

    Darwin