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TPS65982 EVM board start

Botao Miao
Prodigy 70 points
Other Parts Discussed in Thread: TPS65982, TPS65982-EVM

Hi,

I got two TPS65982 EVM board. and try to build a provider-consumer setup. I followed the application report "TPS65982 quick start and system bring up".  First two steps are very good. But in the step 3, " Dead battery and power delivery verification", It can't work as said in the application report. I connected two evm board with a usb c cable. Should I add some pull up/ pull down resistor in any side?

Thanks,

-BM

  • 0
    TI__Expert 3625 points

    Hi Botato,

    Thank you for this inquiry, we are working on correcting some of the issues in this quick start guide. As defined in the quick guide additional pull up/pull down resistors should not be needed on any side if it is a TPS65982-EVM purchased from the TI estore and loaded with the stock EVM firmware (located here). I re-ran through the Quick Start Guide and it worked as documented (words only). Figure 11 is incorrect and will be updated. It currently reflects on the left Config 3 (notebook) and on the right Config 4 (a different notebook).

    What should be seen if the proper FW is on the EVMs, correct switch settings are set, USB Type-C cable connected between the EVMs, and the power supply is connected to the PD Charger EVM is as follows:

    • Left EVM (Config #6 PD Charger Adapter)
      • LED B - Solid ON; CC1 or CC2 ON depending on which way you plugged the cable in; HV LED - Blinking ON; PVDR LD - Solid ON
    • Right EVM (Config #2 Notebook)
      • LED B - Solid ON; CC1 or CC2 ON depending on which way you plugged the cable in; HV LED - Blinking ON; CONS LD - Solid ON

    Please let me know if you see the above.

    If you do not can you describe your set-up for me in more detail? Did you flash your own firmware onto the EVMs or are you using the stock firmware? What type of USB-C cable are you using?

    Regards,

    Karl

  • 0 in reply to Karl Fleischmann
    Prodigy 70 points

    Hi Karl,

    Thanks for the reply. I found the cable is not correct. After I used a right USB C cable, it works as in the user's guide.

    Here is another question. If I want to use the EVM board as a sink device, I can set it as configuration ID 7.  In this mode, it has two capabilities: 

    1) Voltage 12-20 @ 3A

    2) Voltage 20 @ 5A

    During the PD connection, how can I trigger a transient, such as voltage change, current change or power change?  I want to use this device to fully test my USB charger system.

    Thanks,

    -BM