• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 62 subscribers
  • Views 159 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.

TPS23881: TPS23881 function question

Rock Shao
Expert 2800 points
Part Number: TPS23881
Other Parts Discussed in Thread: TPS23861

Hi team,

There has some TPS23881 function question need to know, thanks.

1. The problem of packet transmission, will the 10G packet test drop packets?
2. PSE surge reference circuit components, DM 10KV, CM 12KV
3. For the EMI test method, can the MOSFET be turned on without PD, Ic plus can short-circuit the MOSFET to pull the full load.
4. Recommendations for ATE testing and B/I testing for production testing
5. If I only for an injector, do I need to use the MCU? If so, can the TPS23881 and the MCU share the same ground? Is there a specification for PD?
6. The PD knows where the signal of each port comes from? Is it directly communicating with the MCU?

  • 0
    TI__Mastermind 40100 points

    Hi Rock,

    1. This is more of a data transformer question. If you select the data transformer or magjack rated for 10G, then it should be okay. Note PSE chip is independent of the ethernet data rate. 

    2. 10kv and 12kv surge as an extremely high requirement. Are you talking about lightning surge? If so, please see below TI design for up to 6kV. Note surge is a system level design so even if the TI design uses the TPS23861, you can still use the TPS23881 and use the same surge-specific system level design/components.

    https://www.ti.com/tool/TIDA-01411

    3. If you have control of the PSE through I2C, yes you don't need a PD to force the port ON. You can manually turn them on through I2C.

    4. Please clarify. Our ICs do go through ATE testing to verify it is within the specs of the datasheet.

    5. Yes the MCU needs to load the SRAM patches to the TPS23881 in order to be .bt compliant.

    6. The PD and PSE system is a 1-1 connection so the PD should have direct negotiation with one PSE port at a time.