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USB-C/PWR Splitter

by 8086

This adaptor allows the Raspberry Pi 4 to be used with a Pi USB-C power supply (or DC barrel jack) whilst allowing access to USB OTG data over a separate USB-C connection.

USB Type-C (DATA POWER) <> USB Type-C (USB2 DATA) and USB Type-C (POWER) OR Barrel jack (POWER).

USB Type-C (DATA/POWER) USB Type-C (DATA) USB Type-C (POWER) Barrel Jack
5V 5V 5V (tip)
D- D-
D+ D+
CC1 10k to 5V
CC2 10k to 5V
CC1 5.1k to GND
CC2 5.1k to GND
CC1 5.1k to GND
CC1 5.1k to GND

The barrel jack accepts 5.5 mm plugs (2.1/2.5 pin) supplying 5V.

To use the adaptor with the Raspberry Pi 4 you need.

  • USB-C to USB-C cable1 between Pi4 and the adaptor board (DATA/POWER)
  • USB-C to USB Type-C or Type-A between adaptor board and PC (USB2 DATA)
  • Power2 via either Official Raspberry Pi USB Type-C Power Supply or Barrel jack (5v 2.4 Amp or higher PSU).

1 Whilst USB-C cables are generally designed for higher current I still advise using short power cable to the Pi where possible to reduce voltage drop.

2 PLEASE NOTE With the Pu/Pd resistors on this board it can only be used with 5V supply to power a 5V device.

Using a Cluster HAT node image (p1/p2/p3/p4) you can plug the USB DATA into a computer (Raspberry Pi, Win10, etc.) and access the system via either USB Gadget Ethernet or Serial Console. Can also be used with Pi-KVM

An adaptor of this kind does not fall within the USB specification. It's designed for use with the official Raspberry Pi USB-C power supply and Raspberry Pi, use with other power supplies/chargers and devices may cause issues/damage.