Product Detail
Product description
The CAN PMU is a drone-specific power management unit integrated with an STM32F4 processor and preloaded with the CUAV ITT algorithm. It enables real-time and accurate measurement of a drone’s voltage and current, with support for a maximum input voltage range of 6-62V and a maximum current of 110A. For power output, it provides 5.4V at 5A (with a maximum instantaneous output of 8A for up to 120 seconds and a constant output of 5A), which is used to supply power to the flight controller. In terms of communication, the module adopts CAN bus technology and is compatible with standard UAV CAN protocols. Additionally, each PMU unit undergoes factory calibration to guarantee excellent consistency and high measurement accuracy in practical applications.
Self-developed lTT algorithm to facilitate high-precision measur
The CAN PMU leverages a self-developed ITT (Impedance Temperature Tracking) algorithm, specifically designed to compensate for measurement errors caused by impedance changes under different operating temperatures. This algorithm effectively offsets the impact of temperature-induced impedance fluctuations, enabling the CAN PMU to maintain consistently high-precision measurements of voltage and current across the full range of its operating temperature conditions.
Digital communication, safe and reliable
The CAN PMU adopts the standard UAVCAN digital communication protocol, which enables all information to be transmitted in a digital format. This digital transmission method effectively avoids error issues that often arise with traditional ADCs—devices that are highly susceptible to signal attenuation and external interference during data transfer.
Accurate power consumption estimates
Internally, the CAN PMU performs real-time sampling at a rate of over 100Hz, while simultaneously conducting real-time statistics on both power consumption and instantaneous power consumption. It then transmits accurate power consumption information to the flight controller, ultimately enabling safer and more controllable UAV flight operations.
Low EMI, 5A high current regulated output
The CAN PMU is equipped with a built-in voltage regulator that utilizes the LT8645S chip. This regulator supports an input voltage of up to 62V and functions as a 5.4V/5A synchronous step-down voltage regulator. It features ultra-low electromagnetic interference (EMI) and electromagnetic compatibility (EMC) performance, along with a conversion efficiency of up to 95%. These attributes enable it to meet the requirements of industrial-grade UAV flight control peripherals, as well as application needs for high-power consumption scenarios.
Good thermal performance
Thermal imaging tests conducted at room temperature reveal that under the operating condition of 90A (24V), the case temperature of the CAN PMU reaches only 78 degrees Celsius even after 3 consecutive hours of operation.
lnterface definition
CAN PMU connection schematic diagram
Specifications
| Processor | STM32F412 10OMhz 512K Flash 256K RAM |
| Voltage input | 6-62V(2-15S) |
| Max current | 11OA |
| Voltage accuracy | ±O.O5V |
| current accuracy | ±0.1A |
| Resolution | 0.01A/V |
| Max output power | 6000w/90s |
| Max stable power | 5000w |
| Power port output | 5.4V/5A |
| Protocol | UAVCAN |
| Operating temp | -20°℃~+100℃ |
| Firmware upgrade | support |
| calibration | No need |
| lnterface Type | |
| IN/OUT | XT9O(Cable end)/Amass 8.O(Module end) |
| Power | 5O25850670 |
| CAN | GHR-O4V-S |
| Appearance | |
| Size | 46.5mm×38.5mm×22.5mm |
| weight | 76g |
