Description
The MCU-3221 is a three-channel I²C power monitor board based on the INA3221 chip. It measures voltage and current across three independent power rails simultaneously, making it ideal for battery management systems, embedded devices, and energy monitoring projects. With precision shunt voltage and bus voltage measurement, it supports programmable conversion times for flexible power profiling.
Key Features
- 3 Independent Channels: Monitor multiple power rails simultaneously
- Dual Measurement: Tracks both bus voltage and shunt voltage
- I²C Interface: Simple digital communication
- High Accuracy: Ideal for precise power monitoring
- Programmable Timing: Custom conversion times per channel
- Low Power Operation: Suitable for embedded systems
Specification
- Model: MCU-3221 (INA3221 based)
- Sensor Type: Closed-loop current and voltage monitor
- Input Voltage Range: 0V – 26V per channel
- Bus Voltage Measurement: Up to 26V
- Shunt Voltage Range: ±163.84 mV
- Current Measurement: Depends on external shunt resistor
- Communication Interface: I²C (Default address: 0x40)
- Accuracy: ±1% (typical)
- Response Time: Programmable
- Power Supply: 3.3V or 5V logic compatible
- Board Size: ~30 mm × 20 mm
- Weight: ~3 g
Application
- Multi-channel battery monitoring
- DC power supply diagnostics
- Embedded energy monitoring
- Smart chargers and power banks
- Robotics and IoT power analysis