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UCC21530: I'm having trouble simulating the output of the gate driver on Tina TI

Mukund Choudhary
Prodigy 100 points
Part Number: UCC21530

Hi,

I'm trying to simulate the UCC21530 SiC gate driver on Tina TI.

I set the circuit up as per the data sheet but my output is incorrect. 

I couldn't figure out where the error lies.

 

  • 0
    TI__Prodigy 650 points

    Hi Mukund,

    Thank you for your question. I work on the applications team in the high power drivers group.

    I tried recreating your circuit to see if I could replicate your result.  I didn’t get the same small voltage spike you got at the first rise of the inputs.  My outputs remained low the whole simulation.

    I’d recommend taking a look at your DT circuit. The minimum dead time the part is rated at is 10ns with a DT resistor value of 1k. 

    If this answered your question, could you please press the green button? If not, feel free to ask more questions.

    Thanks and best regards,

    Zach

  • 0 in reply to Zachary Wellen
    Prodigy 100 points

    Hi Zach,

    I tried connecting 1k, 10k and 100k resistors between the DT pin and ground but it gave me the same results.

    I connected the DT pin to VCC and the driver worked.

    Could there be an issue with the driver block on tina?

    Thanks,

    Mukund

  • 0 in reply to Mukund Choudhary
    TI__Prodigy 650 points

    Hi Mukund,

    I managed to replicate your output. The tiny voltage spike seems to be a convergence issue with the model.  The spike is small, only peaking at about 90 pico-volts so it shouldn’t have much of an effect on a larger simulation.  Otherwise the driver is behaving as intended.  If both inputs are high while the DT pin is left open or programmed with a DT resistor, both outputs will remain low.

    If this answered your question, could you please press the green button? If not, feel free to ask more questions.

    Thanks and best regards,

    Zach