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UCC27512: PSPICE Model inquiry

user5070617
Prodigy 90 points
Part Number: UCC27512

Hi Sir

I got UCC27512 pspice model on website , and add it into our ADS simulation software. 

I found it can't be executae AC simulation to get the bode plot of dc-dc buck circuit.

Need I to transfer the gate dirver to a transfer function as AC simulation executed ?

Thanks in advance.

  • 0
    TI__Genius 13445 points

    Hello User,

    Thanks for your interest in our driver.

    Few questions to help me understand the issue and sanity check.

    What specific software are you using? I assume PSpice but please confirm. Are you using the unencrypted version of the model?

    Does any other simulation execute? i.e transient simulation? During the AC simulation, what error message (If any) is displayed?

    Regards,

    -Mamadou

  • 0 in reply to Mamadou Diallo
    Prodigy 90 points

    Hi Mamadou

    I use Keysight's ADS(Adavanced design system 2020) tool to simulate , not PSpice tool.

    And yes, I use unencypted version.

    When we apply in DC-DC buck voltage feedback close-loop circuit , the transient is okay.

    but after AC simulation , I got a wrong bode plot . 

    And I asked ADS FAE , he tell us that need to transfer mosfet & gate dirver to an average transfer function.

    So, I make sure with TI again, if we want to get the bode plot , it need to get an average transfer function ?

    Thanks. 

  • 0 in reply to user5070617
    TI__Genius 13445 points

    Hello User,

    Given the transient simulation is running correct, the ADS software is likely not generating the accurate frequency response from the circuit. You might need to determine the frequency response of the driver + MOSFET which might require you to determine the average transfer function of the [driver + MOSFET] of your circuit. 

    Please let us know if you have additional gate driver related issues.

    Regards,

    -Mamadou