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TPS23754: AT two input Reference Design

Kuan Wei Chen (Kevin Chen)
Genius 9710 points
Part Number: TPS23754
Other Parts Discussed in Thread: PMP21103, PMP20859, TPS2372

Dear Team,

For 2 port .at 12V 50W, dual-input redundant PoE PD with smooth transition.

Which reference design will you suggest?

BR

Kevin

  • 0
    TI__Expert 3700 points

    Hi Kevin, 

    Thank you for your question. For clarification, are you looking for power sharing (i.e. each 25W PD contributes to the 50W total power at the load) or power redundancy (i.e. one PD is active at 50W while the other is in standby mode)? 

    If you are looking for power redundancy for 25W output, I recommend using the PMP20859 front end PD controller design and to pair this with the DC-DC design from PMP21103 which will enable your 12V power redundant solution. 

    Best Regards, 

    Brett

  • 0 in reply to Brett Colteaux
    TI__Genius 9710 points

    Dear Brett,

    But the reference design you suggest use TPS2372, which should be .bt design.

    Do we have .at two port reference design?

    BR

    Kevin

  • 0 in reply to Kuan Wei Chen (Kevin Chen)
    TI__Expert 3700 points

    Hi Kevin, 

    The TPS2372 is a .bt device which is backwards compatible with .at. For an .at two port reference design, you can switch out the class resistor of the TPS2372 to Class 4 and then use this solution for .at power levels. 

    Also, could you please confirm if you are interested in power sharing vs. power redundancy? For power sharing, you can take a look at our PMP5236 (http://www.ti.com/tool/PMP5236). Is this of interest?

    Thank you and please let me know if having any other questions. 

    Best Regards,

    Brett Colteaux