The Simulation and Implementation of SEPIC Converter for Computer Systems

In this study, the analysis and simulation studies on Single Ended Primary Inductor Converter (SEPIC) technology used as a energy source in computer systems are proposed. In computer systems, these converters are inevitable and used widely. To step up or step down voltage, different type circuit topologies are available (Buck, Boost, Cuk etc.). While buck converter can only decrease the voltage, boost converter steps up the voltage. Cuk and SEPIC can be used both process. Some issues like large amounts of electrical stress on the buck, boost and Cuk converter components, the main board power supplies can be overheating. Also negative regulated output voltage is obtained in these converters. These problems are not seen in SEPIC converters. Also they provide to wide operation with high efficiency. By controlling of the gate signal of switching devices, desired output voltage is obtained as positive regulated in SEPIC converter. This study proposed a development of PI control method that provides the proper dynamic and static performance compared to other methods. The simulation and implementation of SEPIC converter is simulated in Matlab/Simulink software