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TPS65988: Application issues.

Reed
Expert 2350 points

Part Number: TPS65988

Tool/software:

Hi Team,

Currently designing a 100W PD project.
Is there a mature case for voltage detection and control timing with an input voltage of 20V for reference?

  • 0
    TI__Mastermind 36912 points

    Hi Reed, 

    Thank you for reaching out!

    Is this a DisplayPort design or an Intel reference design? What is the end-application?

    Best Regards, 

    Aya Khedr

  • 0 in reply to Aya Khedr
    Prodigy 40 points

    Hi Aya Khedr，

    It's for the design of a docking station, we want to use TPS65988 to control DC/DC and power MOSFET for 100W PD application.

    When the PDO of docking station is selected 5V/9V/15V, TPS65988 will control DC/DC to output,; but when the PDO of docking station is selected 20V, TPS65988 will control power MOSFET to bypass DC IN(20V Adapter) to the output.

    Is there any suggestion?

  • 0 in reply to jinsin jin
    TI__Mastermind 36912 points

    Hi Jinsin, 

    jinsin jin said:

    It's for the design of a docking station, we want to use TPS65988 to control DC/DC and power MOSFET for 100W PD application.

    Your understanding is correct here. The TPS65988Dx can control external DCDC and power MOSFET fit for your application. 

    • What is the data requirement (highest data speed) needed for the dock? 
    • What is the Alternate Mode requirement? (DisplayPort or Thunderbolt)

    Typically, Intel Reference Designs are used in Docking applications but more details will help in the right product selection for your application. 

    Best Regards, 

    Aya Khedr 

  • 0 in reply to Aya Khedr
    Prodigy 40 points

    Hi Aya Khedr，

    1.The highest data requirement is 8.1Gbps, we used 2 lane DP1.4 and 2 lane USB3.2 Gen1 for USB-C;

    2.We used DP Alternate Mode;

    Can you supply a reference deisgn(besides the FW of TPS65988) for this special requirment?

  • 0 in reply to jinsin jin
    TI__Mastermind 36912 points

    Hi Jinsin,

    How many ports are needed? What are the power roles and data roles of the ports? 

    We do not have a reference design specific to docking applications but the TPS65988EVM can be referenced as an example.

    Best Regards, 

    Aya Khedr 

  • 0 in reply to Aya Khedr
    Prodigy 40 points

    Thanks Aya Khedr，

    We will follow the TPS65988EVM design in our project, Pls help providing it to us with the Firmware. the Firmware maybe more improtant, because it will check 20V PDO situation to doing bypass.

    Aya Khedr said:
    How many ports are needed? What are the power roles and data roles of the ports? 

    One upstream USB-C is connectting with laptop, TPS65988 will communicate with it by CC channel, it can be the power role SRC when DC IN is inserted, and the data role it can be sink.

  • 0 in reply to jinsin jin
    TI__Mastermind 36912 points

    Hi Jinsin, 

    The TPS6598x Configuration Tool provides a GUI interface to configure firmware for a specific end use. The output of this tool is a binary image that is used to flash the device. You can also refer to the GUI user guide for more information.

    For DisplayPort applications, please refer to this application note. 

    Best Regards, 

    Aya Khedr 

  • 0 in reply to Aya Khedr
    Prodigy 40 points

    Hi Aya Khedr，

    Got it, your information is very useful, we will research more carefully, thanks very much.