Part Number: TPS65986
Hello,
This question relates to our TPS6598x devices, particular in a system similar to our mini-dock reference design: TIDA-01243
The section of the design I am curious about is the power path from USB-C UFP (port where the board is receiving power from) to the USB-C DRP (port where the board is providing power from). I think it is easiest if I showcase two scenarios:
1. Connected to the DRP is a device requiring 5V 1A. Connected to the UFP is a Type-C compliant AC/DC power brick, capable of providing up to 60W (20V 3A).
2. Connected to the DRP is a device requiring 15V 3A. Connected to the UFP is a Type-C compliant AC/DC power brick, capable of providing up to 60W (20V 3A).
Questions:
- In scenario #1, what power profile will the UFP negotiate with the AC/DC Type-C brick? Will it always provide 20V since both devices are capable of a 20V connection, even though the load is only 5W?
- When switching from scenario #1 to #2 (when the DRP goes from sourcing 5W to 45W), does the UFP also have to renegotiate with the AC/DC Type-C brick to accommodate this much higher load?
I hope that all made sense, please ask if you need more info. Thank you!
Regards,
Ryan B.