Published Paper Details:

The high gain DC-DC converters have played a vital role in industrial electronics applications. The dual output quadratic gain buck-boost converter is a combination of quadratic boost followed by buck converter. The non-isolated DC-DC converter topology exhibit quadratic buck-boost voltage transformation ratio together with common ground feature and a positive output load voltage polarity. The dual output DC-DC converter with single input reduce size and cost of the high gain converters in modern power electronics with advantage of multilevel boost outputs and eliminates the requirement of individual converters for each voltage level. The boost applications are more prevalent in harvesting renewable energy so the converter topology is designed to provide multiple boost outputs with high gain and high efficiency. The DC-DC converter performs buck operation below a duty ratio of 40% to obtain quadratic buck-boost gain. The input and output side inductors ensures continuous input current with minimal ripple at input and output sides. The converter topology producing 67W and 150W output powers, at a switching frequency of 75kHz is analysed and the performance study of the DC-DC buck-boost converter is carried out with MATLAB/SIMULINK R2017b. It is observed that the converter attained 100V and 150V for boost operation and 8V for buck operation for an input of 15V with an efficiency of 94% for R and RL loads. The switching pulses for the control circuit is generated using PIC16F877A microcontroller. The experimental results obtained from a 7W and 16W converter prototype designed with a 5V DC input and 75KHz switching frequency confirm the theoretical considerations and the simulation results.