One-Cycle Control of Interleaved Buck Converter with Reduced Voltage Stress

In the conventional buck converter the voltage stress experienced by the semiconductor switches is equal to the supply voltage. Thus, the ratings of the semiconductor devices used will also be high. As the ratings increase, the cost of the components also increases. This paper proposes an interleaved buck topology with reduced voltage stress. The converter also has the advantage of improved step-down conversion ratio; thus it can be used for high step-down applications. The main features of the converter also include continuous input current and lower output current ripple. The proposed interleaved topology consists of two capacitors at the input section which helps in reducing the voltage stress across the semiconductor devices. One-Cycle Control (OCC) is used to provide the triggering pulses for the MOSFET switches. The simulation has been carried out using MATLAB software in order to evaluate the overall performance of the converter. The simulation has been carried out at a power level of 19 W.