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USB-C-PD-DUO-EVM: Need help evaluating USB-C-PD-DUO-EVM

Nir Flysher
Expert 3367 points

Part Number: USB-C-PD-DUO-EVM

Dear Team,

My customer is trying to evaluate the USB-C-PD-DUO-EVM with Samsung S10 mobile.

They've ran into the following issues :

  1. We supply 20v Vin, below 15v the board not working, why?
  2. Charging current looks sinusoidal on DC –  why?
  3. Vbus is stuck on 5v, push buttons not working, why?
  4. Is tps65987d come with default parameters for charging?, if yes what are the parameters?
  5. The GUI is very complicated, how can we work with this GUI?
  6. How can we work with the GUI\board to work with our project requirements:
    1. Vin is 12v max
    2. Vbus is 5v or 9v, depend on Sink requirement
    3. Icharge is 1.5a or 3A depend on Sink requirement
    4. No flash to configure tps65987d during start up

Can anyone on the team please support ?

Best regards,

Nir

  • 0
    TI__Mastermind 36756 points

    Hi Nir,

    An expert will be getting back to you as soon as possible.

    Thank you,
    Eric

  • 0
    TI__Expert 3575 points

    Hi Nir,

    1. The EVM was designed to work with a 20V power supply in order to enable the DC to DC converter. In order to change this behavior, a new DC to DC converter must be design.

    2. Assuming you are measuring input current, this is a normal behavior due to the buck converter.

    3. The Power DUO EVM has a sink and a source. Pushing on the buttons has to agree with the PD contract. For example, If the source offers 15V but the sink is only requesting 5V, you may only see 5V in the sink EVM.

    4. TPS65887d comes with 5 default configurations that can be found in Table 7, page 42 of the datasheet. The datasheet is available in ti.com. In addition, the Boot requirements to enter the default configurations are available in Table 5, page 41 of the datasheet.

    5. For the GUI I would try to ensure that you have the latest version of the GUI available also in the website. In addition, the Power DUO EVM has a very helpful user guide that explains in detail how to install the GUI and how to program the EVM.  

    6. The Power DUO board was designed to work with a 20V power supply. Unfortunately, to meet the specified requirements a new board must be designed.