• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 63 subscribers
  • Views 73 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.

Original question:

Can TPS2373 work with UPoE PSE?

TPS2372: TPS2372

ASB
Intellectual 355 points
Part Number: TPS2372

I have a question regarding UPOE support on TPS2372-3 PD.  with single PD device configured as class 4 (both class A and B resistors are set at 63.4 ohms) device and no LLDP connected to UPOE switch,  what will happen if UPOE PSE is forced to source power on all 4 pairs.  How would UPOE switch will see PD.  as two class 4 devices ?  or will it see it as a single class 4 device?

  • 0
    TI__Mastermind 19181 points

    Hi ASB,

    Thanks for reaching out.

    UPOE PSE uses two AT 2-pairs to build a 4-pairs output. The power can be 60W from PSE and 51W from PD. 

    In a 51-W PD case, if you use UPOE PSE, you can use a MCU on the single-PD side to do LLDP with the PSE. If you can only do forced handshake, you will need two PDs since there will be two handshake events.

    The video link (https://www.ti.com/video/5201555213001) and the picture below may help:

    Best regards,

    Diang