CAN-L4-BM ultra-precise digital power monitor!
CAN-L4-BM is an ultra-precise digital power monitor based on TI INA239 and ArudPilot AP_Periph software.
The resistance of this conductive path is typically 200 μΩ, ensuring low power loss in the application.
With this device, no calibration is required, and a flight controller that supports the DroneCAN protocol can easily obtain accurate bus current and voltage readings via the 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)
PACKAGE DETAIL
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.
