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TPS25830-Q1: Internal switch behavior

Yuta Kurimoto
Genius 10865 points
Part Number: TPS25830-Q1


Hello Team,

I have some question about internal switch behavior.

Q. Regarding with DP/DM switch, are these switch off during the period of CDP negotiation?

Q. If there is no communication in CC1/CC2 and DP/DM pin, are these VBUS switch stays off?

Thanks,

Yuta Kurimoto

  • +1
    TI__Expert 5920 points

    Hi Kurimoto-san,

    Below picture is the behavior for power on. 

    Q1: After 150ms when Rd assert, DP/DM data switch will turn on. So during CDP negotiation, these switch are on. 

    Q2: If CCx don't detect the Rd assert, DCDC will not work. So these switches stay off. 

    Thanks!

    Best Regards

    Ethan Wen