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TPS25751: USBCPD Application Customization Tool - How select other voltages?

Bill Norton
Prodigy 230 points
Part Number: TPS25751

Tool/software:

For Sink-only, the choices for requested voltages are 5, 9, 15, and 20.

The power source advertises 12V as one of it's source capabilities.

How can I have TPS25751D request 12V instead?

  • 0
    TI__Mastermind 29932 points

    Hi Bill, 

    Thank you for reaching out!

    See Section 3.34 in the TPS25751EVM User Guide on how to enable Advanced Configuration Mode in the GUI Tool to set the Sink Capabilities Register to desired voltage/current levels. 

    Best Regards, 

    Aya Khedr

  • 0 in reply to Aya Khedr
    Prodigy 230 points

    Thanks for the tip.

    I found the voltage selected in the questionnaire in SINK PDO_3 of the TX SINK CAPABILITIES (0X33) register.

    The other two PDO's there were for 5V and 9V.

    Are those fallbacks to use if the source doesn't provide the voltage you want?

    Also, the configuration tool doesn't want to exit, either from File->Exit, or from either of the red X's in the upper right of the window.

    Right-clicking on the lower red X and select Simulate browser restart will close the inner window, then red X on the outer one works.

    Browser is Chrome on Windows 11 Pro.

  • 0 in reply to Bill Norton
    TI__Mastermind 29932 points

    Hi Bill, 

    Your understanding is correct. The Sink will Request a PDO from the Source's advertised capabilities. Typically, the Sink will Request its maximum capability if the Source can offer it. A 5V Sink PDO is required per PD specification for the Type-C implicit contract. A 9V PDO is optional. 

    Bill Norton said:

    Also, the configuration tool doesn't want to exit, either from File->Exit, or from either of the red X's in the upper right of the window.

    Right-clicking on the lower red X and select Simulate browser restart will close the inner window, then red X on the outer one works.

    Thank you for bringing this to our attention. I will relay this to our GUI team. 

    Best Regards, 

    Aya Khedr