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Original question:

CSD19536KTT: SPICE Model Request

CSD19536KTT: Pspice model to Ltspice model conversion fails.

Anand Kumar
Prodigy 10 points
Part Number: CSD19536KTT

Tool/software:

Hi,

  When I downloaded the simulation model and used in Ltspice, it show error " The spice error log is not available". Could you help me in resolving this, I have followed the procedures of including the third party library into ltspice. But problem exist.

Thanks

CSD19536KTT Unencrypted PSpice Model (Rev. A)

  • 0
    TI__Mastermind 38330 points

    Hello Anand,

    Thanks for the inquiry. Can you be more specific on the problem you are encountering with LTSpice? Does the error occur when you try to load the unencrypted model into LTSpice or does it occur when you try to run the simulation? I'm not an LTSpice user and cannot offer you much insight into resolving your issue. In some cases, users have had convergence issues with some of our models because they use tabulated subcircuits to model the non-linear parasitic capacitances. You can open the unencrypted model in Notepad to see these subcircuits. Please provide additional information.

    Best Regards,

    John Wallace

    TI FET Applications

  • 0 in reply to John Wallace1
    Prodigy 10 points

    Hello John,

    Thanks for your response. I checked the unencrypted model in Notepad, and as you mentioned, it contains tabulated subcircuits for the non-linear parasitic capacitances. Unfortunately, these table-based functions are not compatible with LTspice, which prevents me from running the model directly.

    Would it be possible for you to provide a version of the SPICE model that is LTspice-compatible (without the tabular subcircuit format), or perhaps a simplified behavioral model that can be used in LTspice? This would greatly help me in validating the device in my design simulations.

    Best regards,

    Anand

  • 0 in reply to Anand Kumar
    TI__Mastermind 38330 points

    Hi Anand,

    Thanks for the update. Try the attached PSpice model in which I have deleted the tabulated capacitances and replaced them with fixed values from the datasheet. Cgd = Crss = 47pF and Cds = Coss - Crss = 1773pF. This will be less accurate but hopefully it should resolve the problem loading the model into LTSpice. Please let me know if you run into any issues.

    CSD19536KTT_CAP.LIB

    Thanks,

    John