Community PCB Design & IC Packaging (Allegro X) PSpice Invalid Number, Compare(-nan(ind),0) Error when Running...

Stats

  • State Not Answered
  • Replies 2
  • Subscribers 27
  • Views 1460
  • Members are here 0
More Content

Invalid Number, Compare(-nan(ind),0) Error when Running Infineon IPDD60R050G7 L3 Model

WillChen072

I'm encountering an issue while trying to run the IPDD60R050G7 L3 model from Infineon in Pspice. Specifically, I'm getting the following error message: "Invalid Number, Compare(-nan(ind),0)".

I've checked the model file for any obvious errors or omissions, but I haven't been able to identify the problem. Could this be an issue with the model itself, or am I possibly overlooking something?

Parents
  • 0

    Try setting ABSTOL to 1n and run the simulation - it should work. If it doesnt, try increasing ITL4=40.

    We also have a nifty .option to find and list expressions used in models which might create convergence issue. Try the below option (include it in the netlist)

    .OPTIONS EXPR_DEBUG

    Using this i got the warning as below. Although setting ABSTOL to 1n made the simulation to work.

    WARNING(ORPSIM-16608): Expression {(a*exp(fpar18-3.3))*exp(((((V(3#)+273)/273)-1)*1.11)/(((V(3#)+273)*fpar20*fpar37)))*((V(3#)+273)/273)**(3/fpar20)*(exp(V(2#,dio)/((V(3#)+273)*fpar20*fpar37)-1))} evaluates to an abnormal value leading to numeric overflow/underflow at time 10.05E-06.
    This expression appears in context of device X_M1.X1.G_Dio and evaluates to value 2.3982e+292.
    Value of operands passed to the expression evaluator:
    X_M1.X1.fpar18=-27.67 CONSTANT=273 CONSTANT=1 CONSTANT=1.11 X_M1.X1.fpar20=1.09
    X_M1.X1.fpar37=8.58e-05 CONSTANT=3 CONSTANT=3.3

Reply
  • 0

    Try setting ABSTOL to 1n and run the simulation - it should work. If it doesnt, try increasing ITL4=40.

    We also have a nifty .option to find and list expressions used in models which might create convergence issue. Try the below option (include it in the netlist)

    .OPTIONS EXPR_DEBUG

    Using this i got the warning as below. Although setting ABSTOL to 1n made the simulation to work.

    WARNING(ORPSIM-16608): Expression {(a*exp(fpar18-3.3))*exp(((((V(3#)+273)/273)-1)*1.11)/(((V(3#)+273)*fpar20*fpar37)))*((V(3#)+273)/273)**(3/fpar20)*(exp(V(2#,dio)/((V(3#)+273)*fpar20*fpar37)-1))} evaluates to an abnormal value leading to numeric overflow/underflow at time 10.05E-06.
    This expression appears in context of device X_M1.X1.G_Dio and evaluates to value 2.3982e+292.
    Value of operands passed to the expression evaluator:
    X_M1.X1.fpar18=-27.67 CONSTANT=273 CONSTANT=1 CONSTANT=1.11 X_M1.X1.fpar20=1.09
    X_M1.X1.fpar37=8.58e-05 CONSTANT=3 CONSTANT=3.3

Children
No Data
Cadence Guidelines

Community Guidelines

The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the most from Cadence technology. The community is open to everyone, and to provide the most value, we require participants to follow our Community Guidelines that facilitate a quality exchange of ideas and information. By accessing, contributing, using or downloading any materials from the site, you agree to be bound by the full Community Guidelines.