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UCC28951: Excel Design Tool-SLUC222D

Art Mecina
Genius 16655 points
Part Number: UCC28951
Other Parts Discussed in Thread: UCC28050, UCC28051

Hello Guys,

Good day.

Our customer wants to have his excel design tool be reviewed, in particular the values for Rf, Cz and Cp.

Also, they want more details on how to use the Frequency response curve.

Attached is their excel design tool.

31OCT20 2036 -- TI E2E -- SLUC222D -- UCC28950 EXCEL SPREADSHEET CALCULATIONS.zip

Thanks in advance!

Art

  • 0
    TI__Prodigy 590 points

    Hello,

    Your thread has been assigned. You should be receiving a response shortly.

  • 0
    TI__Guru* 86206 points

    Hello,

    The tool inputs look O.K.

    The loop gain in the  tool crosses over at 2 kHz with roughly 50 degrees of phase margin at crossover.

    Gain margin is off scale but at 100 kHz the gain - 30 dB so should be O.K. there.

    The following link will bring to an application note on how to design and compensate the voltage loop of the UCC28050 and UCC28051 devices.  This should give you more clarity on the loop compensation and the adjustments that you can make.

    Regards,