GXSC MCU Replaces STM32F103 in Two-Wheeled Electric Vehicle Controllers, Available in LQFP48/64/100 Packages

Two-wheeled electric vehicle controllers are centered around brushless DC motor drive technology. The overall workflow includes signal acquisition, logical operations, closed-loop control, power drive, and safety protection. The main controller continuously acquires analog voltage signals from the throttle, Hall-effect position signals, battery voltage, bus current, brake signals, and gear position signals. Using built-in control algorithms, it interprets riding commands and outputs six complementary PWM drive signals to control the MOSFET power bridge, thereby achieving motor commutation and speed regulation. At the same time, it continuously monitors for fault conditions such as low battery voltage and power MOSFET overheating.

The GXSC MCU is based on the Cortex-M3 core with a clock speed of 72 MHz. It offers strong real-time performance, abundant timer resources, high ADC sampling accuracy, stable CAN communication, excellent interference resistance, and exceptional cost-effectiveness. Through a unique current control algorithm, the chip is suitable for various types of brushless motors, ensuring consistency between stall current and dynamic operating current, thereby protecting the battery and enhancing motor starting torque. The solution automatically identifies the motor’s commutation angle, Hall phase, and output phase, simplifying the motor wiring process.

The GXSC MCU features a rich set of enhanced I/O ports and peripherals connected to two APB buses. These include two 12-bit ADCs, three general-purpose 16-bit timers, and one PWM timer. Additionally, it includes both standard and advanced communication interfaces: up to two I²C and SPI interfaces, three USART interfaces, one USB interface, and one CAN interface. This series of MCUs operates at supply voltages ranging from 2.0 V to 3.6 V and within an operating temperature range of -40°C to +85°C. The series’ power-saving modes ensure compliance with the low-power requirements of two-wheeled electric vehicle controllers.

Furthermore, the GXSC MCUs are available in four different package types, ranging from 36 to 100 pins; the peripheral configurations vary depending on the package type.