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USB EZ-PD Type-C

mafic_3989141
New Contributor

I'm noticing that on the developer board CY4532 in Powerbank configuration the P_CTRL_FET line is disconnected from the drawing you sent me recoverable some time ago at this link

https://community.cypress.com/community/usb/ez-pd-type-c-usb/blog/2019/03/15/cy4532-power-bank-firmw... drp-design

Why is he disconnected? What should I take into consideration?

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1 Solution
ShifangZ_26
Moderator
Moderator

Hi ,

CY4532 do not use two separately path for provider and consumer path. It is only use VBUS_C_CTRL for power bank of Type-C port's provider and consumer path. You could see the VBUS_C is short to VBUS_P on power board.

pastedImage_0.png

Best Regards,

Lisa

View solution in original post

6 Replies
ShifangZ_26
Moderator
Moderator

Hi,

The Blog is sharing the firmware example for single C port. I am not understand your question about P_CTRL_FET line is disconnected from the drawing you sent me? It seems your question is based on Hardware schematic? Could you please kindly specify it?

Best Regards,

Lisa

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mafic_3989141
New Contributor

Below the image shows what I meant ... in the blog example P_CTRL is interconnected while in the schematic of the developer board CY4532 it is disconnected by default. Can you give me a clarification on this?

schematic-without-USB-A-problema-ctrlP.jpgp_ctrl_evk.jpg

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mafic_3989141
New Contributor

any news? Please

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ShifangZ_26
Moderator
Moderator

Hi ,

CY4532 do not use two separately path for provider and consumer path. It is only use VBUS_C_CTRL for power bank of Type-C port's provider and consumer path. You could see the VBUS_C is short to VBUS_P on power board.

pastedImage_0.png

Best Regards,

Lisa

View solution in original post

mafic_3989141
New Contributor

Thank you very much!

So is it advisable to use both consumer and provider fet or use only one?

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ShifangZ_26
Moderator
Moderator

Hi ,

it is advisable to use both consumer and provider fet.

It is okay and verified to use only one path if the DC/DC have capabilities to configure the direction - Charging or Discharge. If you select this way, VBUS_C_CTRL is the recommended control pin.

Best Regards,

Lisa

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