# Adafruit USB Type C Power Delivery Dummy - I2C or Switchable - HUSB238 - STEMMA QT / Qwiic

**Type:** Product page · **SKU:** ADA5991 · **Brand:** [Adafruit](https://core-electronics.com.au/brands/adafruit-australia)
**Page:** https://core-electronics.com.au/adafruit-usb-type-c-power-delivery-dummy-i2c-switchable-husb238-stemma-qt.html ([markdown](https://core-electronics.com.au/adafruit-usb-type-c-power-delivery-dummy-i2c-switchable-husb238-stemma-qt.html.md))

The HUSB238 USB PD sink chip is neat in that you can either use switches (really, resistor selection) to set the desired PD voltage or use I2C for dynamic...

## Pricing

- **Price:** $18.45 (inc GST) — $16.77 AUD, exc GST
- **Quantity discounts:** 10+ $16.31 (exc GST) · 50+ $15.98 (exc GST)

## Availability & dispatch

- In stock, ships same business day if ordered before 2PM (Australia/Sydney).
- We can dispatch 1 today, and up to 500 more in 8–12 days.

## Description

The HUSB238 USB PD sink chip is neat in that you can either use switches (really, resistor selection) to set the desired PD voltage *or* use I2C for dynamic querying and setting. Adafruit already stock a simple **[Adafruit USB Type C Power Delivery Dummy Breakout](https://core-electronics.com.au/adafruit-usb-type-c-power-delivery-dummy-breakout-i2c-or-fixed-husb238.html)** board around the HUSB238, but that one requires soldering closed jumpers to select the voltage. For folks who want a no-soldering-required board, this **Adafruit USB Type C Power Delivery Dummy - I2C or Switchable** is ready for instant gratification. No soldering required!

Compared to the basic **[Adafruit USB Type C Power Delivery Dummy Breakout](https://core-electronics.com.au/adafruit-usb-type-c-power-delivery-dummy-breakout-i2c-or-fixed-husb238.html)** Adafruit have done a renovation to keep the same great schematic and also add some oft-requested features:

- **No soldering required!** Switches allow on-the-fly voltage changes. Terminal block can be used to provide power to your robot, display, LEDs, etc.
- **Green LED** output lets you know that the terminal block power is on - can be disabled if you prefer
- **Stemma QT for I2C control** plug-and-play with Qwiic/QT
- **USB Data lines** available on solderable pads
- **On/Off switch** - you can disconnect the internal pass FET by connecting a switch between two onboard pads. When the switch is *closed* the output will disconnect / turn off.
- Adafruit use the **HUSB328 PDL003A E-Marker variant** of the chip, a little more expensive, but it can request 5A power.

It's perfect for USB Type C wall adapters providing multiple voltages. The standard offerings are 5V, 9V, 12V, 15V, 18V, and 20V. This HUSB238 breakout plugs into the USB C cable and negotiates the PD request and commands over the CC lines. For example, Adafruit can ask what voltages are available and pick the highest. Or if you need a specific voltage, it will select that one.

This breakout will be handy for projects where you need a lot more than 5V @ 2A power: this adapter can give up to 20V at 5A - yes you can get 100W over USB C! - and you could buck that down to get a ton of current at 5V or 12V if that's needed. Or use it to convert a DC or battery-powered device into a USB C powered one!

**DIP switch-configured usage is simple**: simply unplug the USB PD so you don't accidentally select too high a voltage for your device. Then switch ON the voltage you want: 5V, 9V, 12V, 15V, 18V, or 20V. You'll get that voltage and as much current as the adapter will provide. No microcontroller or microcomputer is required!

**I2C-configured usage** is also available via a Stemma QT port. Use the [Arduino library and example code](https://github.com/adafruit/Adafruit_HUSB238) to query the USB Type C PD source for available voltages and currents and select the desired voltage dynamically. When configuring over I2C, the jumper settings are used on startup until the I2C commands come over.

The [STEMMA QT connector](https://learn.adafruit.com/introducing-adafruit-stemma-qt/what-is-stemma-qt) lets you make solderless connections between your development board and the breakout or chain it with a wide range of other sensors and accessories using a [**compatible cable**](https://core-electronics.com.au/search?q=stemma%20qt%20cable). [**QT Cable is not included**, but Adafruit have a variety in the shop](https://core-electronics.com.au/search?q=stemma+qt+cable).

## Technical Details 

Product Dimensions: 29.1mm x 20.3mm x 10.1mm / 1.1" x 0.8" x 0.4"

Product Weight: 3.5g / 0.1oz

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/A/D/ADA5991-1.jpg)