TPS65987D: USB-C-PD-DUO-EVM

Prodigy 190 points

Replies: 17

Views: 148

Part Number: TPS65987D

Hi,

Currently, I bought the USB-C-PD-DUO-EVM and the TPS65988 EVM. I want to make the USB-C-PD-DUO-EVM source board to supply power to the TPS65988 EVM, then TPS65988 EVM as source to provide power to the sink side of the USB-C-PD-DUO-EVM. It will look like the picture below. Is it possible? If yes, how to configure the setting of these two board? Do I need to change the firmware of them? And if I want to change the  USB-C-PD-DUO-EVM to maximum power 200W, how to do that? I change the sink and source capacity from the software, but it did not work.    Best,

Rex

17 Replies

  • Hi Rex,

    I believe you can do this but you will have to negotiate a 20V contract from the Source Duo board first before the TPS65988 EVM can source power to the Sink Duo board. How did you program the power duo boards? Could you please reprogram them and try again making sure you follow the Power Duo EVM User's Guide that describes the programming portion as you have to select the Source/Sink project configurations in the GUI? I believe there is also a jumper that you will have to move when you program the boards.

    Thank you,

    Hari

  • In reply to Hari Patel1:

    Hi Hari,

    I did is flow the Power Duo EVM User's Guide that describes the programming portion to program the source and Sink board. However, it is not working. Only the up stream  work, but the down stream  TPS65988 EVM to sink is not working. Do I need to rearrange the  TPS65988 EVM jumper or select specify program for it? Thanks .

    Best,

    Rex

  • In reply to Rex Li:

    Hi Rex,

    Yes if your source and sink boards are configured correctly, you will then need to make sure the TPS65988 EVM is programmed correctly. As a quick check for the Power Duo boards, you can test them by connecting the source board to the sink board via type-c cable to see if you can negotiate all of the voltages. 

    For the TPS65988 EVM, you will have to program it via the GUI with the correct configurations and then power cycle the board. What settings are you using for the TPS65988 EVM?

    Thank you,

    Hari

  • In reply to Hari Patel1:

    Hi Hari,

    I already test the Power Duo boards, and it works well. For the TPS65988 EVM, I program it via the GUI as the TPS65987D and flow the user guide to set up the jumper. The Power Duo board's source connect to port A, and the TPS65988 EVM's port B connect to the sink board. Is it a wrong configurations for the TPS65988 EVM? 

    Thank you,

    Rex

  • In reply to Rex Li:

    Hi Rex,

    Yes I suspect there may be some incorrect configurations in the register settings. Could you please attach your GUI project file here and I will take a look at it?

    Thank you,

    Hari

  • In reply to Hari Patel1:

    Hi Hari,

    The attachment is the TPS 65988 EVM board project file I used. For the Power duo board, I just use the example project source and sink. Thank you!

    Best,

    RexTPS65988.pjt 

  • In reply to Rex Li:

    Hi Rex,

    I think the issue was that the TPS65988 config was set to be in 87 Emulation Mode, please uncheck this bit and reflash the board. You will also have to power cycle it and it should work.

    Thank you,

    Hari

  • In reply to Hari Patel1:

    Hi Hari,

    I try it. It is still not works. For the USB-C-PD-DUO-EVM, do I need to do the special programming? Right now, I use the example project source and sink  to program it. Thank you!

    Best,

    Rex

  • In reply to Hari Patel1:

    Hi Hari,

    I try it. It is still not works. For the USB-C-PD-DUO-EVM, do I need to do the special programming? Right now, I use the example project source and sink  to program it. Thank you!

    Best,

    Rex

  • In reply to Hari Patel1:

    Hi Hari,

    One more thing, the TPS65988 EVM board's jumper configuration is it correct?