SEPIC and Flyback Converters for Isolated Photovoltaic Battery Charging Application

Abstract

The paper shows the idealized performance and a design methodology for the isolated version of the SEPIC DC/DC converter, including a non-dissipative snubber. This paper compares the use of a Single-Ended Primary-Inductor Converter (SEPIC) and a flyback converter as Photovoltaic (PV) charge controllers for battery charging applications. A simulation based study is also presented, comparing key performance metrics, like efficiency, input voltage and output current ripple, between the proposed architecture and an industry-standard flyback converter.