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TPD8S300A: Can I use SBU1/SBU2 OVP pins to protect another set of CC pins?

Steven Lin
Prodigy 10 points
Part Number: TPD8S300A

Hi.

We have an USB C PD dock application which have two USB C ports (one connected to the charger).

CC1/CC2 have been used for one port, can we use  SBU1/SBU2 to protect another port's CC pin if Vconn is not used?

If SBU1/SBU2 can be used to protect CC pins, can we connect RPD_G1/RPD_G2 to SBU1/SBU2 to provide dead battery functionality? 

Regards

Steven.

  • 0
    TI__Mastermind 23627 points

    Hi Steven, 

    Thank you for reaching out!

    You may use SBUx to protect CCx, but you cannot achieve dead battery functionality if you connect  RPD_G1/RPD_G2 to SBU1/SBU2. This is because there are FETs in series with Rd (see image below).

     

    Please let me know if you have additional questions.

    Best Regards, 

    Aya