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LM5022: Datasheet LM5022 loop compensation

Ye Zhao1
Prodigy 80 points

Part Number: LM5022

On page 24 of the datasheet of LM5022, it shows some steps to do the loop compensation.

My question is that the voltage divider inside LM5022 by 50k and 100k (gain = 1/3) is missing during these steps.

Please advise.

Thank you.

YZ

  • 0
    TI__Mastermind 21720 points

    Hi Ye Zhao1

    Thank you for reaching out with you question and for considering the LM5022 in your design.

    The equation in the datasheet is the generic control loop model of the a boost regulator. To make it accurate to the LM5022 a term of 1/3 should be added.

    Please let me know if you have any questions.

    Thanks,

    Garrett

  • 0 in reply to Garrett Roecker
    Prodigy 80 points

    Garrett

    Good to know. Thank you!

    * When I first used LM5022, the bench FRA results didn't agree with the simulation model. I figured out that 1/3 was missing in the gain.

    However, 1/3 is never mentioned in the datasheet and it was a trap for me.

    Ye