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UCC21710: PSPICE Simulation Error - Undefined Model

Andrew Ridge
Prodigy 20 points

Part Number: UCC21710
Other Parts Discussed in Thread: UCC21750, UCC21732

I am designing an SSPC for an industrial power supply. I was looking into utilizing the UCC21710 for current sense and fault detection purposes. I tried to simulate a model of the tentative design in PSPICE using the UCC21710 part model/library included on the product page. When running a transient simulation, I received the following error:

   ERROR(ORPSIM-15113): Model D_D1 used by X_U1.X_U29.D_D10 is undefined

   ERROR(ORPSIM-15113): Model D_D1 used by X_U1.X_U29.D_D11 is undefined

   ERROR(ORPSIM-15113): Model D_D1 used by X_U1.X_U325.D_D10 is undefined

   ERROR(ORPSIM-15113): Model D_D1 used by X_U1.X_U325.D_D11 is undefined

   ERROR(ORPSIM-15113): Model D_D1 used by X_U1.X_U335.D_D10 is undefined

   ERROR(ORPSIM-15113): Model D_D1 used by X_U1.X_U335.D_D11 is undefined

Also, when I opened the .lib file, I received the following message:

   Model with name "D_D1" could not be added. Another model with the name "D_D1" or a multiple-level model with this name may already exist.

I've attempted a little basic troubleshooting in an attempt to resolve this, but I've had little success. Are there any suggestions as to how I would resolve this issue?

  • 0
    Prodigy 20 points

    Follow up: I tried exploring other gate driver solutions for my simulation (specifically the UCC21750 and the UCC21732) and received the same message upon opening the .lib file. Not sure if that helps diagnosing the issue, but I figured I'd mention it.

  • 0
    TI__Prodigy 160 points

    Hi Andrew,

    To check the model, I ran the UCC21710.opj included with the PSpice transient model. It ran without issues. I also imported the unencrypted PSpice model into the. opj, which also ran without issues. Are you able to share any more details about your issue, such as if you are using the encrypted/unencrypted model, or if you can run the .obj included with the model file without issues?

    Regards,
    Nicholas

  • +1 in reply to Andrew Ridge
    TI__Prodigy 160 points

    Would you be able to share a screenshot of the error?

    One idea would be to check that the correct libraries are added. To check, go to Pspice -> Edit Simulation Profile -> Category: Library. If there are no obvious libraries missing, try adding the basic pspsice libraries as global.