SparkFun

Qwiic Power Switch

Name: Qwiic Power Switch
Brand: SparkFun
SKU: SF-PRT-26784
Price: 17.35 AUD
Availability: OutOfStock

· MPN: PRT-26784

Power Management Arduino Power Supplies and Voltage Regulators SparkFun Qwiic Ecosystem

$17.35 |

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This compact Qwiic board lets you switch power to downstream Qwiic devices so high-current modules can be turned off when they are not needed. That can help ...

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This compact Qwiic board lets you switch power to downstream Qwiic devices so high-current modules can be turned off when they are not needed. That can help conserve energy in battery-powered builds using GNSS and other power-hungry Qwiic boards.

It also provides I2C bus isolation, so slower 100kHz devices can sit in the same project as faster 400kHz devices without forcing the whole bus to run slowly. The board has IN and OUT Qwiic ports, plus pull-up resistor and power LED jumpers for configuring low-power use.

Two extra GPIO pins are available as inputs or outputs for controlling other parts of your project. It works with the SparkFun Qwiic Mux for controlling and powering multiple devices, including devices that share the same I2C address.

SparkFun provides an Arduino library with examples for power switching, bus isolation and GPIO control, along with supporting design files and datasheets.

Features:

PCA9536
4-Bit I2C to Parallel Port Expander
Input/Output Configuration Register
Polarity Inversion Register
Internal Power-On Reset
No Glitch on Power Up
PCA9306
Dual Bidirectional I2C Bus Voltage-Level Translator
Lockup-free Operation for Isolation
DMG2305UX: P-Channel MOSFET
IN and OUT Qwiic Connection Ports
IN and OUT I2C Pull-Up Resistors
2x Extra GPIO Pins
IN and OUT Power LEDs
Can be disabled for low power applications
Jumpers
IN power LED
OUT power LED
IN I2C Pull-Up Resistors
OUT I2C Pull-Up Resistors

Specifications:

Operating Voltage (VCC): 2.3V to 5.5V
Note: Qwiic operation must be limited to 3.3V
Operating Temperature: -40°C to +85°C
I2C Bus: 400kHz Fast I2C Bus
Standby Current Consumption (Typical): 0.2μA
I2C Address: 0x41
On-resistance: 52mΩ (0.052 Ohms) typical on-resistance
Board Dimensions: 1.0in. x 1.0in. (25.4mm x 25.4mm)
Weight: 2.40g

Jargon buster

Plain-language definitions for the technical terms used above.

GNSS: GNSS stands for Global Navigation Satellite System, covering positioning systems such as GPS and similar satellite networks. It matters here because high-precision GNSS modules can output lots of serial position data that this product can send wirelessly to a computer or phone.
GPIO: General-purpose input/output pins are microcontroller pins you can set in software to read signals, switch devices on and off, or connect to peripherals. The number of GPIO pins matters because it limits how many buttons, LEDs, sensors, and other parts you can wire directly to the board.
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.
I2C address: An I2C address is the number a device uses so a microcontroller can tell it apart from other devices on the same I2C bus. It matters because two devices with the same fixed address may conflict if used together.
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.
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.