Core Drive, Smarter Control for the Future
As motor control technologies and solutions continue to advance, the MCU—the core of the overall control system—is reaching new heights. To address diverse market demands for high efficiency, high precision, and high reliability in motor control solutions, Nuvoton introduces the new-generation single-motor control MCU, KM1M4BF6x series.
Target applications include single-motor scenarios such as heat pumps, water pumps, air conditioners, and fans.
Key Features of the Single-Motor Control MCU
Backed by over two decades of accumulated know-how and manufacturing experience in inverter applications, Nuvoton is committed to enabling “faster product development,” “stronger safety assurance,” and “lower-cost” inverter control solutions—now delivered through this newly launched single-motor MCU.
Outstanding Performance
Powered by an Arm Cortex‑M4 core with a maximum clock speed of up to 120 MHz across the full temperature range and an integrated floating-point unit, the MCU boosts computation for motor-control algorithms, shortens control-loop latency, and meets algorithm-speed requirements under challenging operating conditions—delivering smooth, efficient motor control.
Precise Control
A motor-control-dedicated complementary PWM module enables high-precision PWM control. Automatic dead-time insertion is also supported.
Two sets of 12-bit high-precision ADCs support accurate sampling of BLDC motor phase current (three-phase or single-phase).
Safe and Reliable
A sensorless FOC control algorithm is adopted, taking diverse application scenarios fully into account. When an abnormal condition occurs, PWM outputs can be shut down rapidly to protect both the PCB and the motor, ensuring safe system operation.
High Integration
In addition to the ADCs, floating-point unit, and motor-control PWM, the MCU integrates differential operational amplifiers and comparators, reducing external components and PCB space, simplifying control design, and improving cost efficiency.
Product Specifications
Reference Solutions
- Single-motor + PFC single-chip solution: supports single-motor drive while enabling high-frequency PFC control.
- Supports switching between 1-shunt current sensing and 3-shunt current sensing.
Available Materials and Support
We can provide evaluation boards and hardware design materials, along with core algorithm software, to accelerate evaluation and product development.
Local FAE technical support is available, supported by comprehensive development and debugging tools for faster, easier product development.
