Need help to understand the new laptop shematics around PD controller

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  • corrize
    Badcaps Veteran
    • Apr 2021
    • 307
    • France

    #1

    Need help to understand the new laptop shematics around PD controller

    Hello, I start to repair this sort of board, but I’m lost. Bye the old 2 mosfets + charging chip + 3v-5v…
    I can’t « read » this board (Asus UX425 but I saw this in others boards).

    I see :
    In GREEN : 2 diodes for 2 power USB-C ways (I removed one diode)
    BLUE : 2 thunderbolt controllers
    RED : PD controller CYPD (for negociate the voltage with devices plugged in USB-C)
    Comment : in order to appearence, I see thunderbolt controller « and after » PD controller guess. I guess (I hope) those 2 controllers are in parallele, for separate power and signal lines ?

    YELLOW : ? I can’t understand the parallel way ? compare ?
    ORANGE : outputs for voltages created ? 5v 3v ? or 20 v ?

    (I saw a BQ chip on the board)

    Thanks
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