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UCC28711: TIDU412A

robin gangopadhya18
Mastermind 6296 points
Part Number: UCC28711

We are dealing with typ 400 to 480 v /60 Hz 3 phase input. So planning to use the design in TIDU412A.

I have extensively used successfully the xl spread sheet TI had SLUC408B see attached

But this is password protected.. 

I can copy paste in another sheet but it will save me a lot  of time  if someone can dig up the pw for that file.

thnx.SLUC408B.xls

  • 0
    Mastermind 6296 points
    Another twist here: what is I used 650 V GaN devices? Since there is almost no flyback huge peaking nor any ringing , would that work? We prefer GaN due to very low parasitics.Of course, we have to get PWM output to 6V . But that CAN be done by 1 driver chip.
  • 0 in reply to robin gangopadhya18
    Mastermind 6296 points
    Ok, yet another twist: can I get hold of an eval kit ASAP & experiment with cascode using Gan devices? ...I would not get funds for this experimentation though. But after that, if successful, I can return it to you for the benefit of other users. Is that possible?... I wish I could get in touch with Pete Goudreau... he would understand my approach... I lost his email address & local TI ( Arrow) guys wont do it I know for sure.
  • 0 in reply to robin gangopadhya18
    TI__Expert 6080 points

    Hello Robin,

    Thank you for your interest in UCC28711.

    Unfortunately, it is not a good idea to use UCC28711 with GaN Fets because of the Maximum Fsw limitation of 100kHz on UCC28711. GaN fets are normally beneficial for higher switching frequencies. Also, the controller relies on the ringing on the VDS waveform to utilize the valley switching and reduce the switching losses in the MOSFET.

    Please share your power design spec, I  might be able to find a reference design which is more suitable for your application.

    Regards,

    Sonal

  • 0 in reply to Sonal Singh
    TI__Expert 6080 points
    Hello Robin,

    I have not heard back from you so I am assuming that you were able to solve your question.
    If not, just post a reply below or create a new thread if the thread has locked due to time-out.

    Regards,
    Sonal