HOMEMatek AP_Periph CAN-L4-BM Digital Power Monitor
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NewMatek AP_Periph CAN-L4-BM Digital Power Monitor
About Matek AP_Periph CAN-L4-BM CAN Digital Power Monitor
The Matek AP_Periph CAN-L4-BM CAN Digital Power Monitor offers ultra-precise monitoring for your drone needs. It features a low-power resistant path of 200μΩ, providing high efficiency in power consumption. No calibration is required and DroneCAN protocol offers convenient current & bus voltage readouts. Enjoy precision monitoring and convenience with the AP_Periph CAN CAN-L4-BM.
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Top highlights
Built with TI INA239 and STM32L431 running ArduPilot AP_Periph firmware, it delivers accurate real-time voltage and current data over CAN without analog calibration.
Supports up to 0–85V input voltage and 0–204.8A current sensing (approx. 150A continuous), suitable for FPV, multirotor, and medium-to-large UAV power systems.
Uses DroneCAN protocol for direct communication with flight controllers, ensuring stable data transmission with strong anti-interference performance.
Features ultra-low resistance (approx. 200μΩ) current path design, with voltage accuracy of ±0.1% and current accuracy of ±2% for professional-grade telemetry.
Ultra-compact size (approx. 30×22×3mm) and only ~4g weight. Powered by 5V (4.5–5.5V range) with DFU firmware upgrade support for ArduPilot ecosystems.
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Description
FAQ
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.
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)
● 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)
