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TPS65987DDK: TPS65987DDKRSHR for PD sink along with Alt Mode via Apple MAC

Muhammad Awais
Intellectual 720 points
Part Number: TPS65987DDK
Other Parts Discussed in Thread: TPS65987, , TPS65987D

Hi,

We are designing the board that will be consuming the power via USB-C of the laptop and on our side we have the USB-3 Hub along with HDMI for Alt Mode. We are going to implement the TPS65987DDKRSHR as a PD and ALT Mode controller along with TUSB564RNQT as a cross-switch between USB 3.0 and Display Port (separately have the DP to HDMI via SN75DP139RSBT to support 4k @ 30fps).

We are new to USB-C PD and we are assuming that for our application we just need to connect the VBUS form USB-C input to the VUBS pin of the TPS65987 and after complete handshake we should be able to have the voltage at PP_HV pins. I am not getting the function of PP_CABLE pin as in our case we are acting as UFP (upstream facing port), please confirm if we still have to provide any voltage to PP_CABLE?

Secondly, can we use TPS65987DDK as standalone device without any application processor to control TPS65987DDK via GPIO or I2C or we do need someone to boot or control the chip?

Kind regards,

Mat

  • 0
    TI__Genius 12700 points

    Hi Mat,

    The TPS65987DK is only recommend for TBT4/USB4 devices. If you are only supporting DP Alt Mode then I would recommend using the TPS65987DDH. 

    For PP_CABLE, this pin is used for VCONN if you choose to provide support for it.

    For a processor requirement, we typically recommend including an EC in your system. To boot up the system, you just need to provide power to the PD controller and then push a patch of the configurations via I2C.

    I would recommending spending some time looking over the application notes that are available on the TPS65987D product page and watching the training videos all the way at the bottom of the page or you can find them here: https://training.ti.com/how-evaluate-and-configure-our-usb-type-c-pd-controllers

    Thank you,

    Hari