Adafruit
Adafruit USB Type C Power Delivery Dummy - I2C or Switchable
· MPN: ADA5991
The Adafruit USB Type C Power Delivery Dummy (I2C or Switchable) lets you tap into USB-C Power Delivery to get 5V, 9V, 12V, 15V, 18V, or 20V from any compati...
The Adafruit USB Type C Power Delivery Dummy (I2C or Switchable) lets you tap into USB-C Power Delivery to get 5V, 9V, 12V, 15V, 18V, or 20V from any compatible USB-C charger or wall adapter — no soldering required. Built around the HUSB238 PDL003A E-Marker variant, it can request up to 5A for a maximum of 100W over USB-C.
Select your desired voltage using the on-board DIP switches for instant, no-code operation, or use the STEMMA QT / Qwiic I2C port to dynamically query available voltages and switch between them programmatically. A screw terminal block provides easy power output to your project.
Key Features
- DIP Switch Voltage Selection – Choose 5V, 9V, 12V, 15V, 18V, or 20V with no microcontroller required
- I2C Control via STEMMA QT – Dynamically query and select PD voltages using I2C (DIP switch settings used at startup until I2C commands override)
- Up to 100W – Supports up to 20V at 5A with the E-Marker variant chip
- Screw Terminal Output – No-solder power connection to your project
- Power Good LED – Green LED indicates terminal block output is active (can be disabled)
- On/Off Switch Pads – Solder a switch between two pads to disconnect the internal pass FET
- USB Data Pads – D+/D- available on solderable pads for data applications
- No Soldering Required – DIP switches and terminal block for fully solderless setup
Ideal For
- Powering robots, LED strips, displays, and motors from USB-C chargers
- Converting battery or DC-powered devices to USB-C power
- Projects needing more than 5V @ 2A — get up to 20V @ 5A
- Dynamic voltage selection in I2C-controlled power systems
Package Contents
- 1× Adafruit USB Type C Power Delivery Dummy - I2C or Switchable
Resources
- Adafruit HUSB238 Arduino Library (GitHub) – I2C query and voltage selection example code
- What is STEMMA QT?
Jargon buster
Plain-language definitions for the technical terms used above.
- DIP switch
- A DIP switch is a small set of physical on/off switches used to configure hardware settings without software. It matters because changing features such as auto power-on or charging limits may require moving these tiny switches correctly.
- I2C
- I2C is a two-wire communication bus used by many sensors and small modules. It matters because several I2C devices can share the same two wires, but each device needs a compatible address and your controller must support I2C.
- LED
- A light-emitting diode is a small electronic component that lights up when current flows through it in the correct direction. In this kit, LEDs create the flashing effect, so polarity and correct soldering matter for the project to work.
- microcontroller
- A microcontroller is a small computer on a chip that runs your program and controls connected inputs and outputs. For this product, it is the part that reads buttons and sensors, drives the display and speaker, and communicates over Bluetooth.
- Qwiic
- Qwiic is a plug-in connector system for I2C devices that uses small 4-pin cables, so you can connect compatible sensors without soldering. It matters because your controller or adapter also needs Qwiic, or you will need a cable or breakout to wire it up.
- STEMMA
- A plug-and-cable connection system used on some maker electronics boards to make wiring simpler. If a product uses STEMMA, you need the matching cable or connector type to plug it in without soldering.
- STEMMA QT
- A small plug-in connector system for I2C boards that lets you connect compatible sensors and controllers without soldering. It matters because it can make wiring faster and less error-prone, especially when adding several small modules to a project.
- Terminal block
- A connector used to join wires together in a neat, removable, or serviceable way. For this product, it helps split one power input into several outputs without soldering.
- USB-C
- A modern reversible USB connector used for power and data connections. On this product it matters because it can connect directly to a computer as well as to a microcontroller project.
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Brands
Power & Batteries
Prototyping & Wiring
Related Tutorials
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