Design and implementation of a PWM-based digital controller for a high-frequency dc-dc buck converter working in CCM using classical control techniques

In this paper we describe the complete design and implementation of a digital controller for a dc-dc buck converter working in Continuous Conduction Mode (CCM) using classical control techniques. The converter operates at a switching frequency of 500 KHz. The controller is designed on the basis of digital redesign approach and standard bode plot techniques. The design is then evaluated by taking into account the computation delay. Matlab/Simulink simulated results for the fixed and variable loads are shown to validate the design.