CCG3PA 39W Dual Port Car Charger USB A port

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AhKh_4675286
Level 1
Level 1
Welcome! First question asked First reply posted

I am looking at the schematics for the car charger: https://www.cypress.com/documentation/reference-designs/ez-pd-ccg3pa-usb-c-pps-39w-dual-port-car-cha...

Page 2 of the schematics shows the USB data pins connected together thorough a 0R link. Why is this?

DM-A and DP-A are connected together through a 0 ohm link R20.

How can QC 2.0 work? The device should request more voltage e.g. 9V by sending voltage on the data pins. Is the data pins are connected together, QC 2.0 cannot work.

Can you explain this or have I misunderstood?

pastedImage_1.png

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The testing below shows a voltage present on the data pins. How can this be when there is a 0R link connecting them together?

pastedImage_2.png

Are the schematics out of date?

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1 Solution

Hi ,

Please kindly Assemble R19 and R21 and reserve R20 for QC2.0 or QC3.0 charging protocol supporting.

Best Regards,

Lisa

View solution in original post

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3 Replies
ShifangZ_26
Moderator
Moderator
Moderator
10 likes given 250 sign-ins 1000 replies posted

Hi ,

As you may know that Dedicated Charging Port is short DP and DM together. This is not conflict with QC2.0 or QC3.0 charging protocol. 

Best Regards,

Lisa

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How can there be 2.5V on D+ and 0.5V on D- in the screenshot above?

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Hi ,

Please kindly Assemble R19 and R21 and reserve R20 for QC2.0 or QC3.0 charging protocol supporting.

Best Regards,

Lisa

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