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PD Dongle: Difference between revisions
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If the power supply is provided to the Raspberry Pi 5 via a power pin or PoE, a PD handshake with the Raspberry Pi 5's USB-C power port cannot be achieved. Therefore, a pop-up window will appear after system startup, as shown in the red box in the image below. | If the power supply is provided to the Raspberry Pi 5 via a power pin or PoE, a PD handshake with the Raspberry Pi 5's USB-C power port cannot be achieved. Therefore, a pop-up window will appear after system startup, as shown in the red box in the image below. | ||
[[File:PD Dongle adapter-02.jpg| | [[File:PD Dongle adapter-02.jpg|5000px]] | ||
Furthermore, the Raspberry Pi 5's USB port will be current-limited to 600mA. At this time, we can plug our PD dongle adapter into the Raspberry Pi 5's power USB-C port '''to achieve 5V5A PD handshake''', and '''the Raspberry Pi 5 will support full-speed operation'''. At the same time, the Raspberry Pi 5's USB current limit will be relaxed '''from 600mA to 1.6A.''' | Furthermore, the Raspberry Pi 5's USB port will be current-limited to 600mA. At this time, we can plug our PD dongle adapter into the Raspberry Pi 5's power USB-C port '''to achieve 5V5A PD handshake''', and '''the Raspberry Pi 5 will support full-speed operation'''. At the same time, the Raspberry Pi 5's USB current limit will be relaxed '''from 600mA to 1.6A.''' | ||
Revision as of 17:17, 21 August 2026
Product Overview
The PD dongle is an adapter for 5V5A PD handshake with a Raspberry Pi 5. It prevents the Raspberry Pi 5 system from displaying a pop-up window, allows the USB port to accept up to 600mA current, supports reversible insertion of the USB-C port, and is compact (only 1*1cm), saving space. It features immersion gold plating and lead-free manufacturing.
Functional Principles and Problems Solved
If the power supply is provided to the Raspberry Pi 5 via a power pin or PoE, a PD handshake with the Raspberry Pi 5's USB-C power port cannot be achieved. Therefore, a pop-up window will appear after system startup, as shown in the red box in the image below.
Furthermore, the Raspberry Pi 5's USB port will be current-limited to 600mA. At this time, we can plug our PD dongle adapter into the Raspberry Pi 5's power USB-C port to achieve 5V5A PD handshake, and the Raspberry Pi 5 will support full-speed operation. At the same time, the Raspberry Pi 5's USB current limit will be relaxed from 600mA to 1.6A.
Applicable Scenarios
Designed for Raspberry Pi 5 powered without using the USB-C port, including:
- PoE Ethernet power supply
- 40Pin GPIO header / pogo pin power supply
- Other 5V power solutions that bypass the USB-C port
Precautions
- The PD dongle is only used for PD negotiation and handshake with the Raspberry Pi 5 and does not participate in power supply itself. The actual power supply capacity is determined by the pins or PoE module itself.
- This product only removes system-level current limits; it does not increase the output power of your power supply. Insufficient current or unstable voltage may still cause system crashes, reboots, or peripheral malfunctions.
- Occupies the USB-C power port; not compatible with setups that supply power through the USB-C port.
- Designed exclusively for Raspberry Pi 5. Compatibility with other devices is not guaranteed.
Technical Specification
| Compatible Devices | Raspberry Pi 5 |
| Core Function | Analog 5V5A PD power negotiation |
| Interface |
USB-C male connector, supports reversible insertion |
| Size | 10×10mm |
Packing List
- 1x Raspberry Pi 5 Dedicated PD Dongle
FAQ
Q1: Can I use this with a regular USB-C power adapter?
A: No. This dongle occupies the USB-C power port. It is only for use with PoE or GPIO-powered setups where power does not come through the USB-C connector.