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USB EZ-PD Type-C

New Contributor II

Hi. Are the FETs correctly shown in the following ref diagram?

Think that

CONSUMER FET should be driven by pin 4 (VBUS_C_CTRL)

PROVIDER   FET should be driven by pin 3 (VBUS_P_CTRL)

although pins 3 & 4 are only GPIO pins so the swap could be done in s/w. Regardless, just wanting to know if our understanding is correct or not on these labels.

https://community.cypress.com/community/usb/ez-pd-type-c-usb/blog/2019/03

cypress_wrong_fets.png

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Moderator
Moderator

Hi ,

Your understand is correct. I will correct the Blog.

Best Regards,

Lisa

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Moderator
Moderator

Hi ,

Your understand is correct. I will correct the Blog.

Best Regards,

Lisa

View solution in original post

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New Contributor II

Hi Lisa. Would you please check the revised Blog?

https://community.cypress.com/community/usb/ez-pd-type-c-usb/blog/2019/03

I think that the

TOP FET = Consumer FET (since the PB will be consuming current to charge the battery) but must be driven by pin # 4.

BOTTOM FET = Provider FET (PB will be supplying current to the outside world) and must be driven by pin # 3.

With the above changes, then the design as shown appears to be logical to follow.

Please confirm.

Kumar

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