A Novel Soft-Switching Synchronous Buck Converter for Portable Applications

Abstract

This paper proposes a zero-voltage-transition (ZVT) pulse-width-modulated (PWM) synchronous buck converter, which is designed to operate at low voltage and high efficiency typically required for portable systems. A new passive auxiliary circuit that allows the main switch to operate with zero-voltage switching has been incorporated in the conventional PWM synchronous buck converter. The operation principles and a detailed steady-state analysis of the ZVT-PWM synchronous converter implemented with the auxiliary circuit are presented. Besides, the main switch and all of the semiconductor devices operate under soft-switching conditions. Thus, the auxiliary circuit provides a larger overall efficiency. The feasibility of the auxiliary circuit is confirmed by simulation and experimental results.

An integrated bayes soft switching interleaved and sliding window PWM for DC-DC boost converter

“…In [15], PWM technique was combined with passive filter to reduce the switching noise. In [16], a novel soft switching mechanism was designed to utilize zero voltage switching that aims to operate at voltage and efficiency. However, switching loss remained unaddressed.…”

Research on a Novel Soft-Switching Buck Converter

“…Moreover, the operation characteristics have few influences. Previously proposed ZVT-PWM converters have at least one of the following drawbacks (Panda et al, 2008):…”