FPGA-based Random PWM Control of a Buck DC/DC Converter

This paper proposes a real-time, modular and compact architecture for the FPGA-based voltage control based on random PWM (Pulse Width Modulation) of a buck DC/DC converter by means of the Random Center Displacement (RCD) technique. Here a RCD controller algorithm is proposed, integrated into a PID-driven digital feedback control system and tested using a commercial FPGA. Several details of the implementation are discussed thoroughly and the experimental set-up is described. Finally, waveforms and power spectra are commented in order to assess the validity of the implementation