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UCC28084: Support for UCC28084 issue

Sulyn ZHANG
Expert 8700 points
Part Number: UCC28084


Hi Team,

My customer is using our UCC28084 in their charging pile project, but they found that the output of UCC28084 is not symmetric, for example, for the 130KHzs witching frequency, the outA is 4us pulse width and the OUTB is 3.2us pulse width, below is the schematic for your check:

Do you have some idea about this issue? Appreciate you can give quick feedback, thanks a lot!

Best regards,

Sulyn

  • 0
    TI__Mastermind 27145 points
    Hi Sulyn,

    Thank you for your interest in UCC28084. Is the pulse width of OUTA always longer than the pulse width of OUTB? Is the duty cycle varying as well? Is this issue present across the operating load range or only under certain cases?

    One possibility is the slope compensation might need adjustment. Are you able to share waveforms of the CS pin?

    Best Regards,
    Ben Lough