Comprehensive comparison and analysis of non-inverting buck boost and conventional buck boost converters

Abstract

The non-inverting buck boost (NIBB) converter has attracted significant attention in recent years, as it shares ground between input and output, and the voltage stress of switches is lower. In order to investigate the differences between NIBB and conventional buck boost converters, a comprehensive comparison and analysis of these two converters were conducted in terms of their operation principles, which includes multi-mode control strategy and dual-edge modulation here, and also the characteristics of switches and passive components in the two converters were analysed. The results show that NIBB is better than conventional buck boost circuit in these aspects of electrical stress, power loss, cost, passive component volume, and so on. Two prototypes for the two converters with 10 kW/20 kHz were designed and simulated, respectively, for verifying the results. Analytical and simulated results confirmed the conclusions.

Keywords

• switching convertors
• DC-DC power convertors
• conventional buck boost converters
• conventional buck boost circuit
• noninverting buck boost converter
• NIBB converters
• voltage stress
• multimode control
• dual-edge modulation
• passive components
• electrical stress
• passive component volume
• power 10.0 kW
• frequency 20.0 kHz