The default I2C address is 0x08.
Power Output Terminal Block
- + - This is the voltage output pin. This pin will output the voltage selected from the HUSB238.
- - - Common ground for power and logic.
USB Type C Port and Data Pins
At the top of the board is the USB type C port. You'll use this port to plug into a USB C PD wall adapter with a USB C cable. The USB data pins are broken out on the board: Data Plus (labeled D+ on the board silk) and Data Minus (labeled D- on the board silk). These pins are located to the right of the USB type C port.
DIP Switches
On the right side of the board is the 1x6 DIP switch. These switches let you select the voltage that is requested via USB PD. The available voltages are labeled on the board silk. To select a voltage, flip the switch to ON next to the board silk label for the voltage you need. The following voltages are available: 5V, 9V, 12V, 15V, 18V, 20V.
If none of the switches are turned ON, then the highest voltage available from the USB PD supply will be selected, which could be up to 20V.
If none of the switches are turned ON, then the highest voltage available from the USB PD supply will be selected, which could be up to 20V.
I2C
Connect the STEMMA QT connector to a microcontroller or microcomputer board that has a separate power supply. When configuring over I2C, the selected switch settings are used on startup until the I2C commands come over.
- STEMMA QT - This port is located on the left side of the board. These connectors allow you to connect to dev boards with STEMMA QT (Qwiic) connectors or to other things with various associated accessories with connections for GND (black wire), power (red wire), SDA (blue wire) and SCL (yellow wire).
When configuring over I2C, the switch settings are used on startup until the I2C commands come over.
ISet Jumper
- ISet - Towards the top right corner of the board, above the DIP switches, is the ISet jumper. This jumper is connected to the ISET pin on the HUSB238. The ISET pin controls the current available on the board. When the jumper is closed, 1.25A is selected. If the jumper is cut (open), then 3.25A is selected.
- OFF - directly below the DIP switches are two pins that can be used as an on/off switch. These pins are labeled OFF on the board silk. You can disconnect the internal pass FET by connecting a switch between these two onboard pads. When the switch is closed the output will disconnect / turn off.
Power LED and Jumper
- Power LED - In the lower left corner, to the left of the terminal block, on the front of the board, is the power LED. It is a green LED.
- LED jumper - This jumper is located on the front of the board, above the green LED, and is labeled LED on the board silk. Cut the trace on this jumper to cut power to the power LED.
Page last edited July 23, 2024
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