New STSPIN32 BLDC Drivers from STMicroelectronics Target High-Voltage Applications

STMicroelectronics has introduced four new devices in the STSPIN32F0 motor-control system-in-package family, which simplify the design of mains-powered home appliances and industrial equipment including corded power tools, drives, pumps, fans, and compressors.

The 250V STSPIN32F0251 and STSPIN32F0252, and 600V STSPIN32F0601 and STSPIN32F0602 combine three-phase gate drivers and an STM32F0 Arm® Cortex®-M0 microcontroller to simplify high-voltage Brushless DC (BLDC) motor drives. Popular control algorithms and application examples are provided, including single-shunt and three-shunt field-oriented control (FOC), as well as traditional sensored single-shunt and 6-step sensorless control.

The four devices are pin compatible, allowing hardware and firmware to be reused in products for 110 V AC and 250 V AC operation. The ICs feature a standby mode to help minimize power consumption in idle conditions.

All gate drivers integrate bootstrap diodes and protection circuitry including cross-conduction prevention and deadtime insertion. In addition, UVLO on both the lower and upper driving sections prevents the power switches from operating in low-efficiency or dangerous conditions. There is also a patented fast-acting smart ShutDown (smartSD) function for overload and overcurrent protection.

The integrated 48MHz STM32F0 MCU lets users rely on the rich STM32 development ecosystem to build their applications. 4 KByte SRAM and 32 KByte Flash provide data and code storage, while analog and digital peripherals include a 12-bit ADC with up to 10 channels, six general-purpose timers, 21 general-purpose I/O (GPIO) pins, and I2C, UART, and SPI ports. An integrated bootloader permits flexible device-lifecycle management by allowing firmware updates to be applied in the field.

Four inverter evaluation boards are available and fully compatible with X-CUBE-MCSDK (motor control software development kit), starting from 5.4.1 version. These tools simplify development of drives leveraging single-shunt and three-shunt control. The 600V EVSPIN32F0601S1, EVSPIN32F0601S3, EVSPIN32F0602S1, and 250V EVSPIN32F0251S1 also contain a power-supply stage and a populated MOSFET output stage with dual-footprint flexibility that allows replacing the devices provided with alternative MOSFETs or IGBTs in DPAK or PowerFlat packages. A detachable STLINK‑debugger allows configuration and firmware debugging using standard STM32 tools. Single-wire debug (SWD) and UART connectors are also available.

The STSPIN32F0251, STSPIN32F0252, STSPIN32F0601, and STSPIN32F0602 are packaged as 10 mm x 10 mm TQFP devices, and available now from $1.84 to $2.09 for orders of 1000 pieces.

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