I'm designing a battery powered device, which gets charged with 5V. I wanted Type-C as the charging interface, so I designed an appropiate Type-C Port for the device:

enter image description here As you can see, I added the needed 5.1k Pull Downs on CC1 and CC2, to get 5V.

Well, It works as it should when I charge via an USB-A to USB-C cable with my phone wall charger. But when I use a modern Type-C charger with a Type-C to Type-C cable, it only gives voltage in one plug-orientation and I can't understand why. In the other orientation there is no voltage on VBUS (or anywhere).

I think I did everything needed to get standard 5V from Type-C. As I don't need special voltages or current, I don't want to add an overpriced PD-Controller.

I tested the same setup with a Type-C female breakout-board and it was the same.

Type-C Connector in schematic: https://datasheet.lcsc.com/szlcsc/1811101526_Korean-Hroparts-Elec-TYPE-C-31-M-16_C283541.pdf

  • 1
    \$\begingroup\$ If you say "in one plug-orientation" you mean the orientation on the charger side, I guess? In total there are 4 combinations of orientation on both ends combined. \$\endgroup\$
    – asdfex
    Feb 26 '21 at 11:42
  • \$\begingroup\$ I mean the plug that goes into my device. The charger side one can be flipped as I like, It doesn't change anything. \$\endgroup\$
    – Helyon
    Feb 26 '21 at 11:59
  • \$\begingroup\$ You could try connecting the other GND and VBUS pins as well. \$\endgroup\$
    – Finbarr
    Feb 26 '21 at 13:33
  • 1
    \$\begingroup\$ The full spec USB-C connectors have four GND pins (A1,A12,B1,B12) and four VBUS pins (A4,A9,B4,B9) \$\endgroup\$
    – Finbarr
    Feb 26 '21 at 13:48
  • 1
    \$\begingroup\$ Just for sanity, did you try different cables? \$\endgroup\$
    – Passerby
    Feb 26 '21 at 15:12

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Browse other questions tagged or ask your own question.