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Original question:

TPS92200D2EVM: How to evaluate the loop response

TPS92200D2EVM: How to evaluate the loop response

Taroimo
Intellectual 630 points
Part Number: TPS92200D2EVM

Dear TI team

 

I have a question related to the content of the thread below.

I didn't get an answer in the previous thread, so I asked again.

https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1220624/tps92200d2evm-how-to-evaluate-the-loop-response/4611848?tisearch=e2e-sitesearch&keymatch=%252525252525252520user%25252525252525253A449265#4611848

 

Please tell us how to evaluate the loop response with the EVM of this IC.

I am aware that I should evaluate by removing R7 (0Ω) on the EVM and instead populating R5 (49.9Ω) for signal injection. Is this perception correct?

 

We also recognize that there are multiple measurement methods (such as using FRA).

If you have detailed documentation or notes on evaluation, I would appreciate it if you could share them.

 

Best Regards,

Taroimo

  • +1
    TI__Mastermind 19685 points

    Hi Taroimo,

    Sorry for missing the previous thread.

    Taroimo said:
    I am aware that I should evaluate by removing R7 (0Ω) on the EVM and instead populating R5 (49.9Ω) for signal injection. Is this perception correct?

    Yes. You are correct.

    You can use a frequency response analyzer to do the measurement. You can apply the stimulus signal through an injection transformer to the TP6 and TP5 on the TPS92200D2EVM. The output signal can be measured from TP5 on the EVM. The input signal can be measure from TP6 on the EVM. The loop response can be calculated from the measured output and input signal.

    Best Regards,

    Steven