STMicroelectronics STSPIN32F0A programmable motor controller

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STMicroelectronics’ STSPIN32F0A programmable motor controller contains fully integrated gate drivers for three external MOSFET half-bridges, an STM32F0 microcontroller (MCU), a 3.3 V DC/DC switching converter plus a 12 V LDO, giving designers flexible motor-control options in a lightweight and compact 7 x 7 mm outline. The 48 MHz microcontroller, with 32 KB on-chip Flash, can run motor control algorithms such as 6-step sensorless, field-oriented control or position-sensed control, as well as the user application.

The product has an extended operating-voltage range from 6.7 to 45 V and can run from batteries as small as a pair of LiPo cells in mobile robots, gimbals or drones. It is also suitable for power tools, portable appliances like air purifiers and small refrigerators, as well as server cooling fans and 3D printers.

Developers can take advantage of 16 programmable I/O pins and microcontroller peripherals that save CPU involvement to handle motor back electromotive force or position/Hall-sensor feedback and allow precise control down to near-zero rotor speed. These include a 12-bit, 9-channel ADC and three operational amplifiers that can also be used for tasks such as current sensing through a shunt resistor.

Further MCU resources include five general-purpose timers and I²C, UART and SPI interfaces. Users can also access the boot loader, gaining flexibility to upgrade or update firmware over the air.

The gate-driver IC can deliver up to 600 mA per channel, enabling designers to choose from a wide variety of MOSFETs to control motors of various power ratings. Integrated bootstrap diodes ensure start-up, and built-in protection includes real-time programmable overcurrent protection, cross-conduction/shoot-through prevention, undervoltage lockout (UVLO) and overtemperature protection.

For more information: www.st.com/stspin.