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Aerospace

Motor-Control Device Serves Smart Industry, High-End Consumer Electronics

08 November 2016

STSPIN32F0 motor-control system-in-package. Source: STMicroelectronics.  STSPIN32F0 motor-control system-in-package. Source: STMicroelectronics.
 STMicroelectronics has introduced a single-package device for intelligent motor control. The STSPIN32F0 motor-control system-in-package combines the power and flexibility of a microcontroller-based drive with ease of use and space efficiency. Target applications include smart manufacturing equipment, power tools and cooling fans, as well as emerging high-tech product categories such as drones, small robots and home appliances containing high-efficiency motors, such as high-performance portable vacuum cleaners or air purifiers. 

The STSPIN32F0 combines a microcontroller and an analog IC in a tiny 7 mm × 7 mm QFN package, delivering the flexibility and power of a microcontroller-based motor drive with the convenience, simplicity and space efficiency of a single IC. The solution is equally attractive for developers with existing investment in proprietary motor-control IP, or those seeking an off-the-shelf motor-control algorithm.

The STM32F0 microcontroller inside the STSPIN32F0 features the ARM® Cortex®-M0 core, which is capable of hosting versatile motor-control algorithms such as sensored or sensorless FOC, six-step control and others. Its performance enables fast algorithm-execution times, needed for precision control of torque and speed up to high RPM, with bandwidth and headroom to support additional functionality.

The highly integrated analog IC embedded in the STSPIN32F0 implements a three-phase, half-bridge gate driver with integrated bootstrap diodes. Gate-drive current of up to 600 mA allows designers to select from a wide variety of power MOSFETs of an adequate rating for the chosen motor. The built-in protection mechanisms include real-time programmable over-current protection, cross-conduction prevention to eliminate potentially damaging shoot-through currents, and under-voltage and over-temperature protection.

An internal 3.3 V DC-DC buck converter and 12 V LDO linear regulator provide the voltage rails to supply the MCU, the external circuitry and the gate drivers, further enhancing efficiency. The IC can be put into standby mode to disable all the internal circuitry apart from the DC-DC converter that supplies the MCU, thus reducing power consumption to a minimum.

Compared to other microcontroller-based motor-drive solutions, the STSPIN32F0 significantly simplifies design challenges by leveraging the extensive STM32 development ecosystem with software tools, firmware libraries and middleware available on top of the popular motion-control algorithms, such as field-oriented control and six-step control to streamline firmware development.

The STSPIN32F0 motor-control system-in-package is supplied in a 7 mm × 7 mm QFN package. List price starts at $1.95 each for orders of 1,000 pieces.



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