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PSPICE-FOR-TI: Understanding of warnings

Attila Varhelyi
Intellectual 605 points
Part Number: PSPICE-FOR-TI

In „PSpice for TI 2020”, I get these warnings under simulation, and the result of simulation seems as bogus.

Could you tell me more about this warning?

I seems as Coilcraft uses parameters, which is not used in subckt model, which name is Model1A.

Where Model1A come from? It is not included in Coilcraft_PSpiceLib.lib

Is this simulation environment problem, or model problem?

X_L1         N14851468 VBAT LPS4018-223 PARAMS: CPAR=2.5PF IND=22UH

X_L2         N14851468 0 LPS4018-223 PARAMS: CPAR=2.5PF IND=22UH

 

*======================================================================

* SPICE Model generated by Coilcraft

* Coilcraft Part Number : LPS4018-102

* Inductance = 1uH

*======================================================================

* Model Parameters:

*   Valid Frequency Range = 0.0001GHz-0.1GHz

*   Ambient Temperature = 25 degC

*   DC Bias Current = 0 A

*   Non-Linear Frequency Dependent Approximation

*======================================================================

.subckt LPS4018-102 port1 port2 PARAMS: Cpar=2.06pF Ind=1uH

X1 port1 port2 Model1A PARAMS:

+ R1=435

+ R2=0.028

+ C= {Cpar}

+ K1=0.00011

+ K2=0.115

+ K3= {Ind}

+ K4=0.019

+ K5=0.000009

+ L=0

+ Is=0

+ a=0

+ L_Z0=0

+ L_EL=0

+ L_F0=0E6

.ends LPS4018-102

Attila

  • 0
    TI__Mastermind 29035 points

    Hi Attila,

    Please zip up your project directory and share it with me. I have not run into the same issue as you have.

    Thanks,
    JC

  • 0 in reply to JC Zhu
    TI__Mastermind 29035 points

    To see where a model comes from, edit your sim profile, select "Options", then "Output file" and check the check box "LIBIRAY". Now run the simulation again and the .OUT file will tell you the source of each SUBCKT / MODEL.

    -JC

  • 0 in reply to JC Zhu
    Intellectual 605 points

    Hi JC,

    Please use this project for testing. Will be sent later.

    I can not determine what these warning means, and how can I avoid them.

    PS:  Model1A  is included in Coilcraft_PSpiceLib.lib (at the end of file). I searched at the beginning of the file. They usualy are there. It is very interesting, that with using of external Coilcraft lib, PSpice for TI is not restricted to 3pcs probes. Maybe you know the reason.

    PS: Friendship request sent to you.

    Attila

  • 0 in reply to Attila Varhelyi
    TI__Mastermind 29035 points

    Hi Attila,

    Would you mind sending the file to me via messaging (top-right corner)? I cannot access google drive.

    Thanks,
    JC

  • 0 in reply to JC Zhu
    Intellectual 605 points

    Sent as private message.

    Attila

  • 0 in reply to Attila Varhelyi
    TI__Mastermind 29035 points

    Attila,

    Would you please send me these 2 missing files as well?

    ERROR(ORPSIM-16276): Simulation cannot be completed because library D:/PSpice/Libs/Coilcraft_PSpiceLib.lib 

    ERROR(ORPSIM-16276): Simulation cannot be completed because library D:/PSpice/Libs/ST_POWER_SCHOTTKY_V8.LIB

    Thanks,
    JC

  • 0 in reply to JC Zhu
    TI__Mastermind 29035 points

    Attila,

    Thanks for the files. I was able to run the simulation and reproduce your problem. This is the first warning message:

    WARNING(ORPSIM-15256): <X_L1.X1.L_F0> not a subcircuit param

    Model1A is defined in coilcraft_pspicelib.lib with these parameters (starting line 81211):

    + R1=1
    + R2=1
    + C=1
    + K1=1
    + K2=1
    + K3=1
    + K4=1
    + K5=1

    When called by LPS4018-223 (line 19385), these parameters are passed:

    + L=0
    + Is=0
    + a=0
    + L_Z0=0
    + L_EL=0
    + L_F0=0E6

    So, the message is basically saying these parameters are not used by the underlying component definition.

    P.S.: to know where Model1A come from, you can edit the sim profile, select Options, then Output file, then select the checkbox "LIBRARY". The .OUT file will show you the details.

    Thanks,
    JC

  • 0 in reply to JC Zhu
    Intellectual 605 points

    Hi JC,

    I known this when I opened this ticket.

    Is this model problem then?

    What is the news about other warnings (non-causal)?

    Are the two warnings related?

    Attila

  • 0 in reply to Attila Varhelyi
    TI__Mastermind 29035 points

    Hi Attila,

    My suggestion is to contact coilcraft first. The non-causal warning is a bit more involved and I' think it's best to make sure the model is latest first.

    Thanks,
    JC