• State TI Thinks Resolved
  • Locked Locked
  • Replies 8 replies
  • Answers 1 answer
  • Subscribers 62 subscribers
  • Views 205 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

Isolated POE bt PD design support

Ibram Sahibu
Prodigy 30 points
Other Parts Discussed in Thread: PMP23287, TPS23730, TPS2372, TPS2373, TIDA-050023, PMP20878, PMP20859, PMP

Hi there,

We are working on a new isolated POE bt PD design to support up to 51W.

Do you have a recommended solution with a dedicated PD, isolated DC-DC converter, and ideal diode?

The required output voltage at DC-DC is 24V.

 

Regards,

Ibram

  • 0
    TI__Genius 16191 points

    Hi Ibram,

    Thanks for reaching out to us!

    PMP23287 is an isolated 24-V, 2.5-A (2.125 A with PoE, 2.5 A with adapter) active-clamp forward converter reference design. It uses 51-W rated TPS23730, and its rectifier applies half-FET bridge.

    You can find the portfolios including schematic, test report, etc. via  https://www.ti.com/tool/PMP23287

    Please feel free to contact us if you have any further questions.

    Best regards,

    Diang

  • 0 in reply to Diang Xing
    Prodigy 30 points

    Hi Diang,

    Thanks for your reply.

    TPS23730RMT is not in stock. Do you have any reference design based on TPS2372 to match my requirement stated above?

    Regards,

    Ibram

  • 0 in reply to Ibram Sahibu
    TI__Genius 16191 points

    Hi Ibram,

    We do not have a suitable TPS2372 reference design for your case.

    While, you should be able to design your board based on modified TPS2373's reference design. TPS2373 and TPS2372 have multiple similarity. It is not hard to change the Vout too.

    TIDA-050023 (12 V, 51 W, flyback, TPS2373): www.ti.com/.../TIDA-050023

    PMP20878 (24 V, 71.3 W, ACF, TPS2373): https://www.ti.com/tool/PMP20878

    Best regards,

    Diang

  • 0 in reply to Diang Xing
    Prodigy 30 points

    Hi Diang,

    Would you suggest to grab PMP20878 and change the IC to TPS2372 to qualify against my requirement? Seems like a feasible option by loosing Primary Side Adapter Priority feature which we don't need it anyway.

    Regards,

    Ibram

  • 0 in reply to Ibram Sahibu
    TI__Genius 16191 points

    Hi Ibram,

    I do not think replacing TPS2373 to TPS2372 can make PMP20878 work.

    The main issue is TPS2373 has advanced startup circuit (VC_OUT pin), which does not need the PWM controller (UCC2897ARGPR) to do startup. So the PMP20878 does not use the VIN pin of UCC2897ARGPR. While the TPS2372 does not have the startup circuit, when you use TPS2372 on the PMP20878 board it may cause the PWM controller cannot power up.

    You could refer the PMP20859's design for the PWM controller configuration with TPS2372.  

    PMP20859_RevF(001)_Sch.PDF

    Best regards,

    Diang

  • 0 in reply to Diang Xing
    Prodigy 30 points

    HI Diang,

    Can you recommend a EVK with 24V, 3A output and input range is 37 to 60V? Possibly with ACF controller. It does not have to be with TPS2373 to TPS2372.

    In that case, I can buy two EVK to evaluate the solution.

    Regards,

    Ibram

  • 0 in reply to Diang Xing
    Prodigy 30 points

    HI Diang,

    Can you recommend a EVK with 24V, 3A output and input range is 37 to 60V? Possibly with ACF controller. It does not have to be with TPS2373 to TPS2372.

    In that case, I can buy two EVK to evaluate the solution.

    Regards,

    Ibram

  • 0 in reply to Ibram Sahibu
    TI__Genius 16191 points

    Hi Ibram, 

    24V 3A is 72W output power, TI only have TPS2372-4 and TPS2373-4 in that power rating so far. Other chips are less than 51 W and need dual-PD solution.

    I think the only single PD solution with 24V 3A output is PMP20878 (24 V, 71.3 W, ACF, TPS2373): https://www.ti.com/tool/PMP20878

    TPS2373-4EVM (14V 5A) could be ordered online directly. While I think PMP boards need to be requested by your sales team. I will send you the TI's sales team information to your email.

    Updated on Jan/17/2023: It has been a relatively long period that we have not received your reply and I have sent you the sale team information. I will close this thread for now. Please open a new thread if you have further questions.

    Best regards,

    Diang