LTSpice simulation errors

ManagPwrSys

Hello,

I believe I've followed all the instructions in SPICE Module Model User Guide.pdf, but I'm getting simulation errors when trying to run the DTP_Test_Stand_HB circuit (and other files).

My LTSpice is Version(x64): 24.1.4

I do have all the symbol and simulation search paths setup to reference the \Wolfspeed_SPICE_Models\Modules\LTSpice\Models area that is being used.

The errors thrown (repeated dozens of times) are:

• Expected ")" here.
  .param LmflagQ1 = {if(LcsiQ1+0.5,7,6}
• Expected ")" here.
  .param LmflagQ2 = {if(LcsiQ2+0.5,7,6}

The 'here' is referring to a carat symbol pointing to the final squiggly bracket in the code.

Forum_Moderator

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Bdeboi

Hi there,

Sorry about these issues you are facing. We have recently updated our models to be compatible with LTspice 24.1.*. Please download the newest models from our website and try again.

I also recommend updating your LTspice to 24.1.5; it has significant improvements over 24.1.4.

You will need to switch over to the alternate solver in order for the simulation to reliably converge as well. This can be done by going to tools → Settings → SPICE and changing it from 'normal' in the solver drop-down.

Please let me know if you face any issues with the latest versions of the models.

Thanks,

Brian

ManagPwrSys

Hi Brian,

I've updated both LTspice and the Wolfspeed models and am using the alternate solver. Everything looks to be working now. Thank you!