Power over Ethernet to USB-C Power Delivery Adapter

Copyright (c) 2024-2025 Antmicro

Overview

This project contains open hardware PCB design files for an adapter that splits a Power-over-Ethernet (PoE) capable RJ45 interface port into a USB-C Power Delivery (PD) port and an Ethernet RJ45 port. It negotiates power from PoE Power Sourcing Equipment (PSE) such as a PoE switch or a PoE injector. For the USB-C connection, the board serves as an Upstream Facing Port (UFP) power source. The USB-C port can be used for reading current and voltage negotiated for the PD.

Key features

• RJ45 input port for data and PoE++ (IEEE 802.3bt)
• RJ45 output port passing raw Ethernet data from the input port
• USB-C regular connector with Power Delivery feature and USB data downstream
• Automatic input power negotiation (up to 71W) from PSE
• Externally programmable flash memory
• Programmable USB Power Delivery power profiles up to 60W
• On-board VBUS voltage, current and power measurement circuitry
• On-board external fan driver with a 4-pin standard receptacle
• 112 x 56 mm (4.4 x 2.2 inch) mechanical outline

Project structure

The main directory contains KiCad PCB design files, a LICENSE and a README. The remaining files are stored in the following directories:

• img - contains graphics for this README

License

This project is published under the Apache-2.0 license.