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TINA/Spice/LM3478: Frequency response Analysis

Praveen GD
Guru 57737 points
Part Number: LM3478
Other Parts Discussed in Thread: TINA-TI,

Tool/software: TINA-TI or Spice Models

Hi Team,

I want to do Frequency Response Analysis (Bode Plot) for a Boost Converter with LM3478. As per my understanding, we can do Frequency response only with Average Models and not with Transient Models(Correct me if I am wrong).  I can see that we have Transient model in TINA only and the model pinout is also different from the actual pinout. I don't see  DR and Isen pin in the average model. Can you send me the correct model if available. It is okay if it is in PSpice as well. 

Also, one of my customers have translated the Unencrypted Pspice transient Model to 'SABER'. Now, will the model in SABER is valid? Can we consider the results from SABER as accurate results? My customer has tried Frequency response with this model and has got very bad response. We cannot do FR on this right?

Appreciate your support here.

Regards,

Praveen GD 

  • 0
    TI__Intellectual 835 points

    Hi Praveen,

    Please find our response below.

    1. LM3478 Average TINA-TI model available on the web can be configured in boost configuration for simulations. You may use WEBENCH Design Center available in Product folder () to find the gain and phase margins under various conditions and also the bode plots if needed. This data will be available under "Charts" section.

    2. Regarding the pinout difference, in average models, only the pins required to model the main loop are kept in the symbol.

    3. We support PSpice and TINA-TI simulations of which TINA-TI average model is provided on the web.

    Thanks,

    Abhisek

    All TI Spice Models can be found here | All WEBENCH supported devices can be found here

    New to TINA-TI? Its a free spice simulator! Try out this short Video Training Series