New integrated Arm® Cortex®-M0+ Brushless DC motor control MCU, the HT32F65532G. By combining a 32-bit microcontroller, an LDO and a three-phase 48V gate-driver into a single chip, this device forms an extremely suitable solution for single-shunt FOC and sensor-less square wave motor control product applications which have to fit the requirements of small area PCBs. Applicable products include handheld vacuum cleaners, low voltage ceiling fans, electric scooters, electric bicycles, pumps and fans, etc.
The device has an operating frequency of up to 60MHz and contains a 32KB Flash memory and a 4KB SRAM memory. For single-shunt FOC control, the device provides two internal comparators, an operational amplifier, a 2Msps SAR A/D converter as well as a powerful MCTM, GPTM, hardware divider and other peripheral functions. The device also includes a filter which can be used for sensor-less square wave control to execute a more stable startup. Additionally, there are a range of communication interfaces including UART, USART, I²C and SPI, which can be combined with the 6-channel PDMA and CRC-16/32 to improve communication response and security.
The device is available in 32-pin QFN (4×4) and 48-pin LQFP-EP package types with up to 28 GPIOs.