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TPS65988: Daisy Chaining USB-C Power Delivery between multiple PCBs.

Jayaditya Sisodia
Prodigy 10 points
Part Number: TPS65988
Other Parts Discussed in Thread: TPS25751

Tool/software:

Hello, 

I am designing a PCB that would require 5W per board, (5V with up to 1A of current). To power this board, I would like to use a USB C connector such that any off the shelf supply can be used. I would like to design these boards in such a way that they have two USB-C ports, where one acts as the source and the other can sink power to another board, such that multiple of these boards can be daisy chained together. Is this possible with the TPS65988 IC?

Thank you.

Sincerely, Jay

  • 0
    TI__Mastermind 37855 points

    Hi Jay,

    The TPS65988 is not recommended for new designs, so we would not recommend it for this application.

    The IC that we would recommend for this application is the TPS25751, which is a single port PD controller that can be configured for 5-Source, Sink, and DRP and supports up to 100-W.

    You would need to determine how the system architecture works, but the TPS25751 is capable of sourcing and sinking 5-V contracts. If this is only for power, and in a closed system, you may want to consider using Type-C CC line resistor terminations and may not need a PD controller.

    We do recommend that you consider adding an intermediate power stage to regulate the output voltage of the source port. As the TPS25751 only acts as a switch, there is a chance that there will be enough IR drop between ports that it cannot source sufficiently high voltage.

    Thanks and Regards,

    Chris