Reduced-Order Method for Mathematical Modeling of Multi-Phase DC-DC Converter

Abstract

A multi-phase DC-DC converter is effective for miniaturization and achieving high power density in a switching power supply. However, its mathematical modeling becomes complex as the phase number of the circuit increases. This study proposes a new modeling method to derive a reduced order method in a simple manner. The frequency characteristics of the reduced order model are fit to those of the original mathematical model of the multi-phase DC-DC converter. Therefore, the efficacy of the proposed method is validated.