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Load Transient failed - netlist error * ERROR * cir.pspice[138:8-138:8] - Syntax error. Unexpected token: character (PARSER-2)

Jerome Ronne1
Prodigy 75 points
Other Parts Discussed in Thread: TINA-TI

I changed a number of parts to custom components, the main one being the output capactor. I need a long hold up time in my circuit so I wanted to see how this would work. The part in question is the TPS54060-Q1. I set the output capacitor to 3.9mF with 12mohms of impedance Rcomp to 1MEG, Ccomp to 1nF Ccomp2 to 1pf. The  chart showed fairly good phase margin once I tweaked the feedback, but now that I want to see what that looks like the simulation fails.

I am wondering if it fails because I have played with the circuit too much? If the simulation fails, can I rely on the phase margin graph for the loop response?

Vin 18-60V

Vout 14.3V

Iout 0.1A


Your simulation failed due to a netlist error. If you recently changed a component in the BOM or changed a simulation related parameter, try changing it back to its previous value. If the problem persists, it may be due to an internal problem in our system. The problem has been logged and the development team has been notified. If you have any questions, please submit a feedback online at http://webench.ti.com/support/.

Error File Contents:
Simulation: FAIL
* ERROR * cir.pspice[138:8-138:8] - Syntax error. Unexpected token: character (PARSER-2)
* ERROR * Parser error... bailing out. (PARSER-1001)
**************** ERROR/WARNING COUNT ****************
**************** ERROR/WARNING COUNT ****************
Type: PARSER #errors: 2 #warnings: 0
--TOTAL-- #errors: 2 #warnings: 0

Status = Fail
FAILED SIMULATION
failed
simStatus=Failed

  • 0
    TI__Mastermind 39210 points

    Hi Jerome,

    I looked into the netlist and it seems that the custom cap that you selected is not netlisting properly. I will look into this further and get back to you.

    As an alternate for now, you can export the simulation setup to TINA-TI (free simulator offered by TI) and run it there with a simple Output cap model. This export can be done from within WEBENCH by clicking on "Export" button on the top, then selecting "TINA-TI" and clicking on the "Export" button after that. This will download a TSC file for you which you can open up in TINA-TI directly. Let me know if you have any issues.

    Thanks,

  • 0
    Prodigy 75 points
    Any update on this, it seems it is still having problems. I am reaching the point of adding this to my schematic so it would really help if I can nail down the values. Thanks.
     
  • 0 in reply to Jerome Ronne1
    TI__Prodigy 330 points

    Hi Jerome

    We have updated the alternate component selection and custom component creation for Capacitors. If you go into the alternate component selection for Cout and click "Create  a custom part" you will presented with an option to pick Polarized, Aluminium, Tantalum & Ceramic caps. The model that is used in the simulation will be closely guarded by the type of the Cap selected.

    Please pick the cap that is right for you. 

    Hope this helps.

    Thanks

    Kishore