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TINA/Spice/TPS54239: TPS54239

Part Number: TPS54239
Other Parts Discussed in Thread: TINA-TI,

Tool/software: TINA-TI or Spice Models

I have imported the TPS54239 model to TINA from Webbench. While attempting for Transient analysis in TINA, the simulation runs successfully if I select "Calculate Operating point" whereas when I select "Zero initial conditions" or "Use Initial conditions" the results are not as expected. I take care of following during the simulation: -

Go to Analysis >> Options and enable the following options

a) dis-able warning for large size analysis

b) percentage bar

c) Enable instant diagram drawing

Go to analysis >> Set analysis parameters . Click on hand symbol and choose default

Go to analysis >> Transient. Ensure that "Draw extraction" is un-checked

As "Calculate operating point" takes more time, I prefer to perform simulation with "Zero initial conditions"

Can you please help to resolve?

Thanks - Babu

  • hi, Babu,

    We are looking into this question, and will give you feedback on Monday.

  • Hi Babu,

    I am asking the Webench Team, once I get the reply, I will give you the feedback, thanks.

  • Hi Babu,

    "Calculate Operating Point" should be the default setting since you are letting the simulator do what it needs to do to get the "right answer". In the rare case where this does not work, you should try the other 2 options. However these are not magic bullets. They force certain initial conditions (either 0 in case of "Zero Initial Condition" or user specified in case of "Use Initial Condition"), so in some cases may lead to incorrect results if there is some contradictory conditions in the circuit.

    I see you already got the right answers using "Calculate Operating Point", so why do you have a need to go to the other options? Can you also share the TSC file if you need more details. You can find the guidelines in this post: