Heterogeneous SiP delivers intelligent motor control

November 04, 2016 // By Julien Happich
ST’s STSPIN32F0 combines a microcontroller and an analog IC in a 7x7mm QFN package, delivering the flexibility and power of a microcontroller-based motor drive with the convenience, simplicity, and space-efficiency of a single IC.

Target applications for the new SiP 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.
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 (FOC) and 6-step control to streamline firmware development.

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 high 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 600mA 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.
Saving additional external components and helping to simplify system design, an internal 3.3V DC-DC buck converter and 12V 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.

Visit STmicroelectronics at www.st.com/stspin