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Original question:

TPS65987D: tps65987

TPS65987D: Configuration Settings for 20V Sinking

Brent Higgins
Prodigy 30 points
Part Number: TPS65987D

Tool/software:


With this config file this circuit is able to source 5,9,15,20V but now I am struggling to figure out the settings to sink 20V.


TPS65987DDH_Test1.pjt

  • 0
    TI__Mastermind 24752 points

    Hi Brent, 

    Thank you for reaching out!

    Do you have PD logs of the behavior observed?

    Best Regards, 

    Aya Khedr

  • 0 in reply to Aya Khedr
    TI__Mastermind 24752 points

    Hi Brent, 

    I will close out this thread. Feel free to open a new thread for further questions/concerns. 

    Best Regards, 

    Aya Khedr

  • 0 in reply to Aya Khedr
    Prodigy 30 points

    Hi Aya, I was able to enable 20V sinking. This PDO could not be negotiated without VIN 3v3 being supplied. We wanted to sink 20V while the system is off. The planned work-around is to add another part, a VBUS to 3v3 LDO to power VIN 3v3. Do you have some recommendation for this external LDO and is it possible for this external LDO to switch from VBUS to system power? 

    Thank you Aya!