Abstract: This paper presents a voltage regulated two stage buck-boost converter with a soft switching operation. Many dc-dc converters are available in which the converters are divided into several types depending on the increase or decrease of the output voltage level with respect to the input voltage. This paper  deals with a soft switched buck boost converter with voltage regulation in ZVS mode. The efficiency of the converter is the main issue which is reduced through zero voltage soft switching. Other issue regarding the dc to dc converters are the lack of voltage regulation, which is reduced through closed loop feedback circuit. Also, utilizing only one inductor as an extra element to achieve this goal makes the converter more economical and reliable with a simpler structure. The main feature of the project is its high frequency resonance operation. Frequency controlled operation enables more efficient converter characteristics.

Keywords: Resonant Converter, ZVS Operation, Buck Boost Converter