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TPS25751: TPS25751 only advertises 5V/3A, missing other Source PDOs

Tom Tsao
Expert 1870 points
Part Number: TPS25751

Tool/software:

Dear TI Support Team,

I'm using TPS25751 as a PD Source and configured four PDOs in the Web-based GUI:

  • 5V/3A, 9V/3A, 15V/3A, 20V/5A

However, during PD negotiation, only 5V/3A is advertised. I’ve checked the EEPROM settings, reloaded them, and verified with a PD analyzer, but the issue persists.

Is there any setting I might have missed? How can I confirm all PDOs are properly applied?
I've attached my json file, schematic and PD log for reference.

Thanks!

attached file.zip

  • 0
    TI__Mastermind 30362 points

    Hi Tom, 

    Thank you for reaching out!

    In the Json file provided, there are 4 Sink PDOs configured and only 1 5V/3A Source PDO configured (see below)

    Source Capabilities:

    Sink Capabilities:

    Please ensure that Transmit Source Capabilities (0x32) is configured as properly in order for the TPS25751 to advertise its Sourcing Capabilities.

    Best Regards, 

    Aya Khedr