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LM25037: LM25037 unencrypted SPICE model problem

Fabian Hartery
Prodigy 20 points
Part Number: LM25037

In trying to use this model with in a simulator I am encountering errors related to the following SPICE declarations

V_IRT1 RT1VAL  RT1

V_IRT2 RT2VAL  RT2

The simulator reports that it is expecting five parameters here when only two have been declared? This is in fact true whereas both are voltage source IDs that are lacking specific AC and DC values. Would you please correct this or send me an updated SPICE model that fixes this issue? The particular version of the model I am using is LM25037_TRANS.LIB version 1.20 dated (November 10th, 2016) as located on the part's product page and published as your unencrypted model. Thanks! 

  • 0
    TI__Mastermind 26285 points

    Fabian,

    The models are meant to run in TI PSpice for TI and TINA. which simulator are you using where you are seeing the error?

    Steve

  • 0 in reply to Steven Mappus1
    Prodigy 20 points

    LTSPICE but that error indicated in a fundamental SPICE parameter where a voltage source needs predefined AC and or DC values. Very sadly, lots of companies are now encrypting their models making it impossible to evaluate designs where you are stuck with using sole source parts. Many designs really don't evolve that way? 

  • 0 in reply to Fabian Hartery
    TI__Mastermind 26285 points

    Fabian,

    The error is more likely related to the conversion into LT Spice. Sorry about the frustration but as you can imagine TI is only supporting TI simulation tools and even at that, many of the older legacy ICs (such as LM25037) are not much supported beyond their capability to operate in TI PSpice, TINA, etc. You probably have visited the LM25037 product folder and seen the various models offered. There is an unencrypted PSpice model available. 

    Also, I ran the LM25037 PSpice Transient Model (Rev. B) sim and it worked as expected. Runs a bit slow but no errors.

    Regards,

    Steve