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TPS23755: Rcomp and Ccomp equations

Nicholas Carley
Genius 11510 points

Part Number: TPS23755

Hello,

I don't see any equations for Rcomp and Ccomp (1 and/or 2). Are these calculations located somewhere else?

Thanks,
Nick

  • 0
    TI__Mastermind 21320 points

    Hello Nicholas,

    The selection of Rcomp and Ccomp are more DC to DC design questions rather than a PD selection question. This topic would be beyond the scope of what is in our datasheets. Our EVMs and TI Designs are optimized for their specific power requirements, and therefore the Rcomp and Ccomp are specific for that design. 

    Do you have something different than one of those designs?

    If you need more information, there is some compensation techniques on ti.com. Specifically, look for Power Design Seminars, for example a Flyback design. This will give you more information on that topic.

    Regards,

    Michael Pahl 

  • 0 in reply to Michael Pahl
    TI__Genius 11510 points

    Hi Michael,

    This seems odd to me that this was intentionally left out being that the DC/DC is integrated into the device. Compensation equations are very common and expected (from our customers) when designing a power supply, specifically when a device includes a COMP pin.

    Is there another TI device which which the DC/DC is based on? We can go use it's compensation equations for our calculations.

    Thanks,
    Nick

  • 0 in reply to Nicholas Carley
    TI__Mastermind 21320 points

    Hello Nick,

    Compensation is dependent on topology, and none of our datasheets contain the information to calculate these values. 

    Below I put a link to a training video for compensation for isolated flyback techniques. 

    https://training.ti.com/isolated-flyback-compensation-techniques

    Additionally, here is a white paper from the Power Design Seminars that explains how to design stable control loops:

    https://www.ti.com/seclit/ml/slup173/slup173.pdf

    Regards,

    Michael Pahl