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This paper presents design and implementation of DC-DC Buck Boost converter by using 8051 microcontroller. The switched mode dc-dc converters are most widely used electronic circuits for its high conversion efficiency and flexible output voltage. These converters are designed to regulate the output voltage against the changes in the input voltage. Many existing and developing electrical and electronic technologies require the voltage of different levels that are supplied from an available source voltage such as a battery. DC-DC Buck Boost converters are devices designed especially for maintaining constant DC output voltage, if the supply voltage is variable. The demand for compact power supplies has grown significantly. Power supplies with low cost, high efficiency and smaller size are required. To control the output voltage of the converter, the controller is designed to change the duty cycle of the converter. In this converter, IGBT switch is digitally controlled by 8051 microcontroller. The circuit is simulated in MATLAB SIMULINK and then the results are verified with hardware implementation. This paper focuses on the hardware design and implementation of DC-DC Buck Boost converter. This converter is used as a voltage regulating device and mainly used where the load is very sensitive.

Design and Implementation of Dc-Dc Buck Boost Converter by using 8051 Microcontroller