A buck quadratic PWM soft-switching converter using a single active switch

Abstract

High switching frequency associated to soft commutation techniques is a trend in switching converters. Following this trend a buck PWM converter is presented. The DC voltage conversion ratio of this converter has a quadratic dependence on duty-cycle, providing a large step-down. This new buck quadratic PWM soft-single-switched converter, having only a single active switch, provides high efficient operating condition for wide load range at high switching frequency. In order to illustrate the operating principle of this new converter a detailed study, including theoretical analysis, relevant equations and simulation and experimental results is carried out.