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USB EZ-PD™ Type-C

Anderson_Lin
Level 2
10 replies posted 10 sign-ins 5 replies posted
Level 2

PFET Gate Drivers on VBUS Path

CCG3PA has two integrated PFET gate drivers to drive external
PFETs on the VBUS provider and consumer path. The
VBUS_P_CTRL gate driver has an active pull-up, and thus can
drive high, low or High-Z.

Q: How to implement High-Z in FW ?

 

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PranavaYN
Moderator
Moderator 50 likes received First comment on KBA First question asked
Moderator

Hi,

VBUS_P_CTRL is internally pulled up to VBUS_IN_DISCHARGE. Therefore it can't be driven High-Z when VBUS_IN_DISCHARGE is connected to the input supply. This is necessary to turn VBUS provider FET on and off.

May I know the reason why you want to drive that pin to High-Z?

Best regards,
Pranava

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