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TPSI31PXQ1EVM: Function of TPSI3052 and Simulation

Roberto
Prodigy 20 points

Part Number: TPSI31PXQ1EVM
Other Parts Discussed in Thread: TPSI3052, TPSI31P1-Q1, TIDA-050063

Tool/software:

Hi team,

Do you have a file that I can use for simulating the design?

And what is the function of the TPSI3052 on the evaluation module?

Kind regards,

Roberto

  • 0
    Prodigy 20 points

    The Excel calculator tool doesn't work correctly. AFter changing the parameter P_SUPPORT The sheet doesn't work anymore.

    Can you have a look at this?

  • 0 in reply to Roberto
    TI__Expert 8971 points

    Hello Roberto,

    Thanks for joining E2E and reaching out to our team! We are currently developing a TPSI31P1-Q1 PSpice model that should be available within the next 2 months, it will be available on the device product page once released.

    The purpose of the TPSI3052 on the EVM is to provide additional power (+79 mW) to help with switching if needed. The calculator tool can help determine whether or not to consider more switching power, there will be a warning if the max switching power exceeds what the TPSI31P1 can provide alone when PSUPPORT? = FALSE. This may cause delays in charging.

    The calculator tool seems to be working for me with the same inputs, unsure why your copy is not working.

    The only issue I can immediately tell is that the calculator tool is reaching max calculation capacity with your given inputs.

    Make sure you have turned off automatic calculations and are manually recalculating after providing new inputs.

    Since this design charges linearly, I suggest halving CLINK (20 mF --> 10 mF) and doubling the tCHARGE (1450 ms --> 2900 ms) output to estimate the full charge time.

    Best regards, 
    Tilden Chen

    Solid State Relays | Applications Engineer

  • 0 in reply to Tilden Chen
    Prodigy 20 points

    After putting Psupport to FALSE the sheet breaks. Because when I put it back to TRUE it still doesn't work.

  • 0 in reply to Roberto
    Prodigy 20 points

    I also have a question about the inductor. Why did you change to a Coilcraft or Wurth inductor instead of the Bourns (1140-561K-RC) inductor used in TIDA-050063 ?

  • 0 in reply to Roberto
    TI__Expert 8971 points

    Hello Roberto,

    Can you please attach your sheet here so I can take a look? Difficult to tell like this.

    Roberto said:
    I also have a question about the inductor. Why did you change to a Coilcraft or Wurth inductor instead of the Bourns (1140-561K-RC) inductor used in TIDA-050063 ?

    Many customers gave feedback after the initial design saying they preferred surface mount and wanted to minimize size, so looked at alternatives. The Bourns inductor performed fine.

    Best regards, 
    Tilden Chen

    Solid State Relays | Applications Engineer

  • 0 in reply to Roberto
    TI__Expert 8971 points

    Hello Roberto,

    I downloaded your file but after toggling PSUPPORT and recalculating, I am receiving an output. I am unable to recreate your issue. Perhaps try re-downloading the tool and trying again?

    PSUPPORT = TRUE

    PSUPPORT = FALSE

    Best regards, 
    Tilden Chen

    Solid State Relays | Applications Engineer

  • 0 in reply to Tilden Chen
    Prodigy 20 points

    I already tried that and had the same result. Is it possible that a setting in my Excel is different in Europe then in the USA? I already switched of the auto calculate 

  • 0 in reply to Roberto
    TI__Expert 8971 points

    Hello Roberto,

    Thanks for your reply. Yes, perhaps the difference between Europe and USA Excel versions is causing this issue. I am uncertain how to set my region. I tried changing the decimal separators to commas but it is still working. I'm wondering if there is a language difference that is causing the calculator to break. But the calculations use boolean logic and cell references, surely that is the same across languages...

    Best regards, 
    Tilden Chen

    Solid State Relays | Applications Engineer