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TPS25810-Q1: CC pin functionality details

Tejas P R
Prodigy 30 points
Part Number: TPS25810-Q1

We are using Type-C DFP Controller for Charging, and I need to know the functionality behavior of CC pins. In our scenario without connecting the Charger cable both CC1 and CC2 are getting high (whether this has internal pull up to IN2?), and after connecting a device for charging both the pins are getting dropped to 0.92V and 1.2V(Why this is happening?), So I need a clarity on how it behaves because there is no proper information about CC pins in datasheet.

  • +1
    TI__Mastermind 18556 points

    Hi Tejas P R,

    Yes, we have the internal current source pull up, and the current source will be determined by the 1.5A or 3A current broadcast.

    For example, when you insert the Rd(5.1kohm) in the CC1, and you use the  CHG=1, CHG_HI=0, choose the 1.5A broadcast, then our internal current source will be the 180uA typ, so you will see the 180uA*5,1Kohm=0.918V in the CC1 pin.

    Thank you.

    Best Regards,

    Kuno