Practical Evaluation of Dual-Switch Buck-Boost DC-DC Converter (TOKUSADA Converter)

Abstract

A new buck-boost (i. e., step-up/down) dc-dc converter (TOKUSADA converter) is introduced and practically evaluated. This converter consists of two self-turn-off switches, two FRDs and a small dc-inductor, and performs boost, buck and even buck-boost operations. Applying the boost and buck operations, this new converter obtains a seamless and wide-range output voltage control from buck region to boost region with a high efficiency especially in larger current conduction. The advantage against the traditional single-switch buck-boost converter and the conventional dual-switch CASCADE converter is analyzed and practically confirmed.