• State TI Thinks Resolved
  • Locked Locked
  • Replies 7 replies
  • Answers 1 answer
  • Subscribers 33 subscribers
  • Views 835 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.

TPS65987-90EVM: iPad Pro USB C as a sinking device.

Roy Wheaton
Prodigy 50 points
Part Number: TPS65987-90EVM
Other Parts Discussed in Thread: TPS65987, TPS65987D, TIDA-00891

I currently have a setup where a POE device provides power and data to an iPad. We want to upgrade the iPad to an iPad Pro with USB C. If I understand correctly, this would require the iPad becoming a sinking host. I am able to charge the iPad Pro from the POE device using a pull up resistor, but the iPad will not recognize the POE device. Will this evaluation board allow me to configure this correctly?  I have already purchased the EVM.

Is there a better solution? A less expensive device?

Thank you in advance for your assistance.

And Happy New Year!!

  • 0
    TI__Expert 6430 points
    Hi Roy,

    TPS65987 can be a power source for the iPad, but then this device can only be pd it can't help you in any way with POE.

    Please let us know your exact requirement, we can suggest you a suitable device based on that.

    Thanks,
    Rahul
  • 0 in reply to Rahul Sharma16
    Prodigy 50 points
    Hi Rahul,
    We don't need assistance with POE. The POE device is a standalone device, and it currently connects to the iPad via a simple cable which consists of a USB 2 Micro AB connector to a Lightning connector.

    What we need is an intelligent cable which will charge the iPad from the existing POE device via the USB Micro AB connector, and allow data to pass from the POE device to the iPAD. At this time, I cannot get the iPad PRO to recognize the device.
  • 0 in reply to Roy Wheaton
    Prodigy 50 points
    I should add that the POE device not only charges the iPad, but provides an ethernet connection. What we need is assistance in selecting the correct device around which to create our design.
  • 0 in reply to Roy Wheaton
    TI__Expert 6430 points
    Hi Roy,

    Now I understand that you want to use TPS65987D as an Type-C PD interface only to enable charging of iPad and want to route usb signal of ethernet dongle along with the power from it.

    If my above statement is right then TPS65987D might be a overkill for you. You can check out TPS25xxx series of Type-C controllers if charging voltage is limited to 5V.

    Please click "This resolves my issue" if I was able to answer your query.

    Thanks,
    Rahul
  • 0 in reply to Rahul Sharma16
    Prodigy 50 points

    Hi Rahul,

    First of all, thank you for your assistance to date, and your speedy responses. They are much appreciated.

    I reviewed some of the productds in the TPS25xxx product line, and may find some answers there. I had also stumbled (my normal method of navigation<grin>) upon a TI reference design: USB Type-C Plug to USB Type-A Receptacle SuperSpeed MUX With UFP Controller Reference Design TIDA-00891 that shows promise.

    One thing that we would like to try is to be able to show the client that there is a solution by using the evaluation board that we have. Is there a way that we can create a script that would do what we need, including supplying charging power to the iPad from 5 volts?

    Does a script exist that would already accomplish this?

    Once again, thank you.

    Roy

  • 0 in reply to Roy Wheaton
    TI__Expert 6430 points
    Hi Roy,

    Yes, you can use the TPS65987-90EVM to give a demo. You don't need any script for this, just use our configuration utility and configure it to support iPad's sink PDOs (you should be able to find this on their charger).

    Thanks,
    Rahul
  • 0 in reply to Rahul Sharma16
    TI__Expert 6430 points
    Hi Roy,

    I hope I was able to answer your query.

    Please click "This resolves my issue" if my above statement is true.

    Thanks,
    Rahul