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Original question:

Pspice

LM5026EVAL: PSpice Transient Model Simulation Error

Suheyl Tr
Prodigy 190 points
Part Number: LM5026EVAL
Other Parts Discussed in Thread: LM5026, UCC2897A

Hi TI Team,

I'm trying to simulate LM5026 EVAL BOARD (hence LM5026) in PSpice for TI (17.4) and I followed the instructions according to the document in the zip file. I configured library files (eval board.lib & lm5026.lib) accordingly, but I get so many errors in simulation as follows:

Can you please help me with this issue? Thanks.

  • 0
    TI__Mastermind 27885 points

    Suheyl,

    I will need time to collaborate with colleagues. I will respond back by COB 02/11/2022.

    Steve

  • +1 in reply to Steven Mappus1
    TI__Mastermind 27885 points

    Suheyl,

    Running the sim on PSPICE for TI, I see the same errors you are reporting. The issue seems to be that the original PSPICE model was created using the full version of Cadence/PSPICE. When we run the model on PSPICE for TI the first thing that happens is rebuilding the index files (.IND) and we see warnings/errors such as: “Warning: Library file xyz.ind does not have the correct format”, and “Making new index file xyz.ind”

    It could also be that components used in the sim model are not TI based as PSPICE for TI requires.

    In either case, when these error occur during the start of the sim run, it's an indication that the model in it's present form is not compatible with PSPICE for TI but should run as expected in Cadence/PSPICE full version. My apologies for the frustration of not being able to run the sim on PSPICE for TI.

    Since LM5026 is an active clamp controller, TI also offers UCC2897A as an Active Clamp PWM option. If this might be an acceptable option for you, please check the UCC2897A PSPICE and TINA sim models available here.

    Thanks for connecting through E2E.

    Regards,

    Steve

  • 0 in reply to Steven Mappus1
    Prodigy 190 points

    Hi Steven,

    Thank you again for your time. I prefer using LM5026 because of its thermal shutdown capability. I tried the model on Cadence/PSpice and It worked as you said and I will continue using that. 

    Best,

    Suheyl

  • 0 in reply to Suheyl Tr
    TI__Mastermind 27885 points

    Suheyl,

    Understood and good to hear that you are up and running with the LM5026 PSPICE model. Thanks for connecting through E2E and for your interest in TI products.

    Regards,

    Steve M