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TPS62933: Average Model

Part Number: TPS62933
Other Parts Discussed in Thread: TINA-TI

Hi team,

Do we have an average model of the TPS62933 that can be used for performing a stability analysis in p-spice? We need a bode plot showing magnitude and phase. Do we have an examples of this?

Thanks,

Cam

  • Hi Cam,

    It doesn't look like an average model has been created yet aside from the transient. Typically a SIMPLIS model is used for getting gain/phase plots. 

    Although a little more constrained, WEBENCH is probably your best bet for gain/phase plots unless a SIMPLIS model is available for this device.

    Thanks,

    Joseph

  • Hi Joseph,

    What's the difference between a all these models??? 

    How do you create an average model?

    Thanks,

    Cam

  • Cam,

    SIMPLIS is software made for switching power applications and is able to simulate much quicker than PSPICE. I believe that typically the systems/apps are responsible for creating models.

    The transient model is currently available on PSPICE for this part which is good for simulating things like steady state output, line + load transient, and start-up behavior. 

    The average model (using SIMPLIS) uses more behavioral blocks, so probably more of an "ideal" model than PSPICE, but allows it to simulate transient and frequency response/loop response much quicker.

    Let me know if this clarifies the question.

    Thanks,

    Joseph

  • Hi Joseph,

    Oh! I wasn't aware that there was a specific simulation software for that type of application. 

    Any idea how certain devices in our portfolio have this type of model and others don't? 

    Thanks,

    Cam

  • Cam,

    I think it maybe depends on customer need/demand, or what the product line feels is most useful for simulating their parts.

    I've seen some products with TINA-TI simulation models, PSPICE transient/average, or SIMPLIS. Most common seems to be PSPICE transient model.

    So, it seems to vary and depend what product it is.

    Thanks,

    Joseph

  • Hi Joseph

    SIMPLIS model is used within BU since it is more related to the internal logic. But for customers, the webench model is nice to get the phase margin since it was built according to the validation based on the EVM.

    Hope that helps.

    BR

    Ruby

  • Thanks for the clarification Ruby!

    -Joseph