Hi,
I have a device that I'd like to run in two modes with the PTN5150:
1. When battery is present, use USB-C DRP mode.
2. When battery is not present, use USB-C UFP mode.
I know the PTN5150 would work well for the first mode, but I am unsure about the second. In the second mode, the PTN5150 will have no supply voltage and from my understanding, VBUS is not connected to a UFP until CC detection is complete. Will UFP CC detection work if the PTN5150 has no power or do I have to find another solution?
Thanks,
Luca
Solved! Go to Solution.
CC pins connected to VDD internally of IC, if VDD no power,CC pin can't work normally.
CC pins connected to VDD internally of IC, if VDD no power,CC pin can't work normally.
I want to do something similar in my system.
Could you check that the CC pin doesn't work properly when VDD is unpowered because:
1) This UFP use case is covered in the demo board.
2) When I connect 5V through a 10K resistor to CCx on an unpowered PTN5150A, I read 1.27V on the CCx pin.
It looks like the PTN5150A is implementing the +/- 20% voltage clamp from table 4-25 of the USB Type-C spec before it is powered.
Thanks,
Gavin