Ultra-Precise I2C Power Monitor, I2C-INA-BM

• I2C-INA-BM is an ultra-precise digital power monitor based on TI INA228.
• The resistance of this conductive path is 200 μΩ typical, providing low power loss in the application.
• Support 3x I2C-INA-BM on one I2C bus in parallel.
• No calibration required,  Flight controller with ArduPilot fw can easily get accurate current & bus voltage readouts via I2C bus.

Specifications

• INA228 85-V, 20-Bit, Ultra-Precise Power monitor IC With I2C Interface
• Battery Voltage sense input: 0~85V
• Current Sense Range:  0~204.8A
• Load current on current sensing resistor:  150A(Continuous),  204.8A(Burst)
• Voltage accuracy: ± 0.1%
• Current accuracy: ± 2%
• Interface: I2C  (Decimalism Address 69 by default, 68 and 65 options)

• Power supply for I2C-INA-BM board : 4~9V  @5V pad/pin
• Power consumption: 1mA
• LED Red, 3.3V indicator
• Operating Temperatures: -40~125 °C

• Physical
  • Board Size: 27mm*20mm*6mm.  4g
  • 3D file : I2C-INA-BM_STEP.zip

• Parameters
  • BATT*_MONITOR  ->21 (INA2XX)
  • BATT*_I2C_ADDR -> 0 (or 69, 68, 65)
  • BATT*_I2C_BUS   -> 0/1/2 , depends on the FC I2C bus connected
  • BATT*_SHUNT   -> 0.0002
  • BATT*_MAX_AMPS  -> 204.8

Packing

• 1x I2C-INA-BM board
• 1x JST-GH-4P to JST-GH-4P 20cm silicon wire

Tips

• The big pad on the bottom side is a dead pad. No any circuit network on it.
• Solder the positive wires as close as possible to both sides of the current sensing resistor.
• Compatible with ArduPilot firmware only now.