This application note describes a low-cost PMAC motor drive system using the ST7FLITE35 microcontroller and STS8C5H30L complementary MOSFETs. It is suitable for PMAC motors up to 12V-50W. The document provides reference schematics, firmware library, and convenient functions for sinusoidal waveform generation, synchronization mechanism, and closed-loop control of PMAC motors.