Abstract

DC-DC converter in buck mode reduces level of voltage efficiently as per the requirement. Economic power conversion increases the durability of battery, less heat loss, and helps in building smaller gadgets. This has the application in domestic and industrial areas. Operation of many converters depends on the switching properties of the power elements. So many buck converters use second MOSFET in place of diode. This is because when the diode starts conduction in buck converter, the losses that occur in diode, called conduction losses increases when the ON time of diode increase. Due to these conduction losses in diode, the efficiency of the converter might decrease. To increase the efficiency reducing the conduction losses, synchronous Buck converter is proposed. The main objective of this paper is designing synchronous buck converter for LED applications. Another objective is to design a controller for obtaining precise output. In this paper open loop and closed loop synchronous buck converter has been done in Matlab /Simulink for LED applications are presented.

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