부산대학교 도서관

DC-DC converters are commonly used for output voltage regulation; converters regulate the overall voltage of the system by increasing or decreasing their output voltage. These inductors and capacitors help in this kind of voltage fine-tuning, which temporarily stores the input energy coming to the DC-DC converters and then discharges it out. This conversion method can increase or decrease the voltage level. In this paper power loss analysis of SEPIC based buck-boost converter and derived non-isolated SEPIC based buck-boost converter is studied, both converters are designed for LVDC (Low Voltage DC) systems. MATLAB model of converters is also included in this paper. The converter implemented in this paper has only one switch so this converter can be easily controlled in continuous conduction mode(CCM). However, the number of storage components increases, power losses as well as the complexity of implementation also increases. The working principle and mathematical analysis of the derived converter is explained here. In conclusion, experimental results are also verified.