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TMS320F280049: SFRA gain margin

Strong ZHANG
Expert 4740 points

Part Number: TMS320F280049
Other Parts Discussed in Thread: SFRA, BOOSTXL-BUCKCONV

Hi Expert,

in page 48 of below reference design, the SFRA result show that gain margin showed the value is only 9.33dB, which seems too small, is it correct?

https://www.ti.com/lit/ug/tidu986a/tidu986a.pdf?ts=1622537727738

  • 0
    TI__Guru 62975 points

    Strong,

    Yes, that is the measured Gain Margin for that specific balance of Crossover Freq, GM, and PM on the BOOSTXL-BUCKCONV.  The control loop can be tuned by the developer to better satisfy custom requirements.

    -Tommy