Modeling and implementation of dsPIC based interleaved buck converter

In this paper, 4-phase interleaved buck converter is simulated and implemented by using 16 bit dsPIC30F2020 microcontroller. Proposed interleaved buck converter can operate as a single converter or interleaved converter mode. It shares the load current, and changes its switching frequency according to operation mode to achieve same ripple effect in interleaved converter mode. Before implementation stage firstly, the saturation effect of inductors and performance of converter have been tested and the system is simulated with co-simulation carried out with MATLAB/Simulink and FEM-based software. The data obtained from FEM-based software and Simulink is compatible with each other. Finally whole system is implemented and the advantages of the proposed converter structure have been presented based on comparison of simulated and experimental results with a traditional buck converter. It is seen that output current ripple, EMI level and voltage stress on components are reduced with proposed interleaved converter.