[Matek] 마텍 Ultra-Precise I2C Power Monitor (I2C-INA-BM)

- 2025년 8월 20일 현재 시점에서 아두파일럿 펌웨어와만 호환됩니다 (PX4 지원 안함)

- 구입 시점의 펌웨어 지원 여부는 제조사 홈페이지에서 확인해 주세요 : https://www.mateksys.com/?portfolio=i2c-ina-bm#tab-id-2

구성

I2C-INA-BM 보드 1개

JST-GH-4P ~ JST-GH-4P 20cm 실리콘 와이어 1개

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.