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TPS65982: A Bus-Powered USB Hub Solution that can provide +12V and 1-2A Power Downstream (Diagram Attached)

Hany AbuShall
Prodigy 20 points
Part Number: TPS65982
Other Parts Discussed in Thread: TIDA-01243, TPS65988, , TPS65987D, TUSB8041

Hi All, Doc1.pdf

I have attached here a PDF with two pages that shows what I would like to accomplish.

I need a USB 3.0 hub solution that would at least has one port as an upstream (connecting to a computer) and two downstream ports (one connecting to a USB 3.0 camera and one to a motherboard).

If possible, I would like to know the answers to the following two questions:

1- Could I use the "USB Type-C™ and Power Delivery Minidock EVM (TIDA-01243)" (or another TI USB hub available such as "TPS65988 EVM") as my USB 3.0 hub shown in green in the first page attached?

- Basically, it has to be able to have a USB PD 3.0 Type-C upstream connector to communicate with a computer and be able to receive 12V and 1 to 2A of power.

- Also, for it to have two down stream ports, one which is a normal USB 3.0, while the other is a USB PD 3.0 connection to be connected to a motherboard (it should be able to provide the motherboard with a 12V and 1 to 2A of power while be able to communicate with it.

2- Could we use the "TPS65982 EVM" (as shown in red in page 2 attached) to negotiate the power requirements with the USB hub and to make this power and data communicated available to the mother board (e.g. in the form of 4 wires connection to the motherboard, i.e: +12V, GND, +Data and -Data?

Please let me know if any of this is not clear enough. I would be glad to answer further questions about this. Looking forward to your feedback.

  • 0
    TI__Mastermind 28830 points
    Hello Hany,

    1. You can use a device like the TPS65987D to negotiate a PD contract, and sink the 12V/2A contract you are looking for, but you will still need a USB HUB if you would like for one USB port to extend to two separate systems.

    2. Yes, you can use the TPS65982 EVM to negotiate a power and data contract that can feedback into your system.
  • 0 in reply to Adam Mc Gaffin
    Prodigy 20 points
    Hi Adam,

    Thanks for your helpful reply! I understand.

    Any suggestions for a USB HUB 3.0 in the market (including from TI) that is capable of connecting 12V 1-2A of power upstream and downstream (a passive hub, that does not get power from a wall outlet) and communicate USB 3.0 data to at least two downstream ports?

    Thanks for confirming this. For the TPS65982 EVM, I will certainly read more of its user guide and figure out how to exactly implement it in my system. But just to be sure (and before I immerse myself in hours/days of research, as shown in the diagram in page 2 attached, 4 "normal/shielded" wires can be hooked into the TPS65982 EVM jumpers/connectors and be used to feed into the "motherboard" D+, D-, 12V, GND. It would be great if you can confirm that.

    Thanks again for your answers and I am looking forward to your feedback.

    Best,
    Hany
  • 0 in reply to Hany AbuShall
    TI__Mastermind 28830 points
    Hello Hany,

    I do not know of a USB HUB (TI or non-TI) that is capable of handline 12V. So you will probably need some type of Buck or LDO to drop this voltage down. A good USB 3.0 HUB that TI make is the TUSB8041.

    Nothing seemed to have been attached to your post, but to answer your question that yes you can connect wires and test points to the EVM as you see fit. As long as you do not apply a voltage somewhere that shouldn't be applied, then it should be fine and is in fact encouraged.