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TPS25750: Using TPS25750 as a PD Source for a Downstream Port on a USB Hub

Jehee Lee
Prodigy 20 points
Part Number: TPS25750
Other Parts Discussed in Thread: TUSB8020B,

Tool/software:

I am designing a USB 3.0 hub using the TUSB8020B. I want to connect a smartphone to the upstream port (so the phone becomes the host), and use one of the downstream ports not only for USB data but also to supply USB PD power (e.g., 5V–20V charging) to another device.

I plan to use the TPS25750 to enable PD Source functionality on that downstream port. The data lines are managed by the TUSB8020B, while the TPS25750 handles the power path and PD negotiation independently.

Could you help confirm the following:

  1. Is it valid to use TPS25750 in this configuration (PD Source on a downstream port while acting only as a power provider)?
  2. Should I treat the PD port as USB2/3 data-less (power-only) or connect the data lines through the hub?
  3. Any design references or recommendations for coordinating the TUSB8020B and TPS25750 in this kind of system?

Thank you in advance for your support.

  • 0
    TI__Expert 4795 points

    We currently do not have products that are suited for only sourcing high voltage. We have products that can both sink and source (DRP) and sink only. Please check back soon to hear about new products we are developing for source only applications.