• State Resolved
  • Locked Locked
  • Replies 2 replies
  • Answers 1 answer
  • Subscribers 33 subscribers
  • Views 457 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TPS25750: Bidirectional Usb C PD Converter

Ash Warren
Prodigy 90 points
Part Number: TPS25750
Other Parts Discussed in Thread: ASH, , TPS65988

Hi all,

I was wondering if it was possible to create a Bi-Directional combined Usb C sink / source device. Hopefully it would have just a single type c connector on one side and a dc connector on the other.

Ideally I would like it to be able to take a voltage eg: 12-20v in and be able to output 5v/9v/15v/20v on the USB C port as well as passing through power from a USB C source to a Dc output ie: select 5v/9v/15v/20v and have it output that to a Dc connector from a USB C power bank / wall adapter.

Is there a chip that can do this and auto negotiate or would it even be possible to use two USB C Pd controller's back to back? 

Thanks all, and apologies for any errors or issues.

  • 0
    TI__Mastermind 32441 points

    Ash,

    What you are describing is called a DRP (Dual Role Provider)  This is a device that is capable of either sinking or sourcing power.

    You will need several chips to execute what you want to do.  

    1.  You will need a usb pd controller.  For your application I recommend the TPS25750 because it can execute all of the necessary type c/pd as well as providing control to the power section

    2.  For the power section, you will need the following:

    1.  a buck boost converter to generate the 4 voltages you desire from the voltage input range you are describing.  They TPS55988 is a good choice for this option.   We have an Applications note for the TPS65988 that shows how this interface would work.

    2.  a wide VIN buck converter to provide the PP5V power path required for the TPS25750.  The selection for this device is more difficult because we have many options that will work.  You need to ensure that it meets the total system power budget plus meets your current output for the 5V output case.  frequenty a 4A current budget is sufficient.

    3.  5V -> 3V LDO to provine VIN_3V3 to the TPS25750 in the case where you are sourcing power from the local DC power supply

    4.  The correct power muxing and protection netween your source and sink power paths that both must connect to the TPS25750.

    With this combination

  • 0 in reply to Chuck Branch
    Prodigy 90 points

    Hi Chuck,

    Thank you so much for your response, this has clarified the design and will greatly help.

    Thanks Again