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TINA/Spice/TPS543C20: TINA Model export from Webench

Yuto Sakai
Mastermind 6100 points
Part Number: TPS543C20
Other Parts Discussed in Thread: TINA-TI,

Tool/software: TINA-TI or Spice Models

Hi,

 Let me know about TINA-TI model of TPS543C20.

Is it possible to simulate the TINA-TI model of TPS543C20 exported from Webench in 2-phase by changing the circuit?

If No, is there a model of TINA-TI that can simulate with 2-phase?

Best Regards,

Yuto Sakai

  • 0
    TI__Intellectual 2680 points
    Hi Yuto,

    Yes, You can simulate exported TINA model for 2-phase configuration. The model was validated for couple of cases in Pspice.
    Kindly let me know if you face any issue in configuring model for 2 phase in TINA-TI.

    Thank you for reaching out to us.

    Regards,
    Saket
  • 0 in reply to Saket
    Guru 10200 points

    Saket-san,

    I tried the 2 phase simulation with TINA-TI.

    However the following error message appeared. Do you have any idea for resolving this error?

    I attach my TINA-TI file. Please let me know the point which I should correct.

    TPS543C20_2PH.TSC

    Best Regards,
    Kohei Sasaki

  • 0 in reply to K. Sasaki14
    TI__Intellectual 2680 points

    Hi Kohei San,

    Wires at ISHARE & VSHARE pins in U1 instance were floating and that is why it gave above Warning.

    I have corrected it now and PFA modified TSC file.

    TPS543C20_2PH_MOD.TSC

    Also kindly note that I have changed the names of few jumpers(shown in below diagram in red) for U2 instance as the same name of jumper for U1 and U2 will create a short between two instances and might give erroneous results.

    I also observed that you are keeping Soft start and RT frequency for different from first phase. As per my knowledge Soft Start & RT frequency were kept same (for both phases) while validation of model for 2 phase.


    Please let me know if you have any further questions.

    Regards,
    Saket

  • 0 in reply to Saket
    Mastermind 6100 points

    Hi Saket-san,

    Thank you for your reply,and I'm sorry for rate reply.

    When I checked the rising waveform with the corrected file I received,

    the oscillation like the attached image was simulated.

    How do I change it?

    Beat Regards,

    Yuto Sakai

  • 0 in reply to Yuto Sakai
    TI__Intellectual 2680 points
    Hi Yuto San,

    I was unable to see attached image of your simulation results.
    Could you please re-attach them along with the .TSC file (that you are simulating)?

    Thanks & Regards,
    Saket
  • 0 in reply to Saket
    Mastermind 6100 points

    Hi Saket-san

    I'm sorry for rate reply.
    I attach the oscillation waveform again.
    TSC file is "TPS543C20_2PH_MOD.TSC" which was attached before.

    2570.TPS543C20_2PH_MOD.TSC

    Best Regards
    Yuto Sakai

  • 0 in reply to Yuto Sakai
    TI__Intellectual 2680 points
    Hi Yuto San,

    I am looking into this issue and will get back to you shortly.

    Thanks & Regards,
    Saket
  • 0 in reply to Saket
    Mastermind 6100 points

    Hi Saket-san,

    Thank you for your kind surpport.

    I'm looking forward to hearing from you.

    Best Regards,

    Yuto Sakai

  • 0 in reply to Yuto Sakai
    TI__Intellectual 2680 points

    Hi Yuto-San,

    I was able to fix the issue and I have made couple of changes in test bench.

    1. I have shorted SYNC pins of both phases. In 2-phase configuration device works in MASTER-SLAVE configuration and here U1 instance is MASTER which decides switching frequency for U2 (SLAVE) by using SYNC feature.

    2. RSP pin for 2nd phase(U2) was floating which is now connected to VOUT node and I think this was the main reason we observed weird behavior of inductor current. (Below image is attached)

    Please find attached TSC file simulation results.

    TPS543C20_2PH_MOD_22NOV2017.TSC

    Kindly let me know if you have any questions on this or if you face any issue in running attached TSC file.

    Thank you for your patience.

    Regards,

    Saket