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TPS62065: Loop stability simulation

Part Number: TPS62065
Other Parts Discussed in Thread: TINA-TI, , TPS62825A, TPS62825

Hi,

The web page for the part lists only transient models.

Is there any way to a loop stability/phase margin simulation with this using TINA-TI? I had understood one needed an "average" model that...

Regards,

Anand.

  • Hello Anand,

    Thanks for contacting to us for your queries.

    We don't have an average model for TPS62065, so there no simulate the loop stability of the circuit. Anyway, it is possible to check the phase margin in the time domain by observing the output voltage during transient load. Please refer to the attached file, which demonstrates how to characterize the loop stability of an actual application.


    By the way, we have a newer device (TPS62825 - PSM mode and TPS62825A - FPWM) which you can consider in your project. It includes the SIMPLIS models where you can conduct loop stability simulation.

    Best regards,

    Excel


    6036.Simplifying Stability Checks_slva381b.pdf

  • Thank you, will consider the newer devices as well.

    One more question in this regard: I see that TPS62065 does have a PSpice transient model. If I use PSpice with that model and an appropriate injection circuit, I should be able to do an AC analysis and get gain and phase margin, is that correct?

    Thanks,

    Best regards,

    Anand.

  • Hello Anand,

    The Pspice transient model is not enough to conduct gain and phase margin simulation. Instead, an average model is required to perform an AC analysis. Unfortunately, the average model is not available for this device. And creating such a model will take at least 8 weeks minimum.

    Best regards,

    Excel

  • Hello Anand, 

    Just a soft reminder.

    Do you have further queries?

    Best regards,

    Excel

  • Thanks, Excel, no further questions on this at this time.

    Best regards,

    Anand.