MATEK CAN-L4-BM AP_Periph High Precision DroneCAN Digital Power Monitor |Mechfpv of Shenzhen

CAN-L4-BM is a ultra-precise digital power monitor based on TI INA239 & ArudPilot AP_Periph firmware.

The resistance of this conductive path is 200 μΩ typical, providing low power loss in the application.

With this device, No calibration required, flight controller that support DroneCAN protocol can easily get accurate current & bus voltage readouts via CAN bus.

Specifications

MCU: STM32L431xC, 256KB Flash

INA239 85-V, 16-Bit, High-Precision Power monitor IC With SPI 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

CAN, DroneCAN Protocol

UART2, spare, DFU

ST debug, SWCLK & SWDIO

LED

Blue, Fast blinking, Booting

Blue, Slow blinking, working

Red, 3.3V indicator

Power supply for CAN-L4-BM board : 4.5~5.5V @5V pad/pin

Power consumption: 10mA

Operating Temperatures: -40~85 °C

Physical

Board Size: 30mm*22mm*3mm. 4g

3D file : CAN-L4-BM_STEP.zip

Firmware

ArduPilot AP_Periph MatekL431-BattMon

Update via DroneCAN GUI Tool

Parameters

CAN_P1_DRIVER = 1 if attached to CAN bus1 port or CAN_P2_DRIVER = 1 if attached to CAN bus2 port

BATTx_MONITOR = 8 (DroneCAN-BatteryInfo)

Packing

1x CAN-L4-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.

2 ears for mounting can be cut off if you don't need it.

If the CAN wires are too long, bridge the "120R" jumper.