Design and implementation of zero-voltageswitching quasi-resonant positive-output Luo converter using analog resonant controller UC3861

This study presents the analysis, design and voltage regulation of a zero-voltage-switching quasi-resonant positive-output Luo converter with low switching losses for applications requiring constant power supply such as telemetry, computer and communication systems. To increase the power packing density, a simple control method using an analog resonant controller UC3861 is used to regulate the output voltage against load variation and supply disturbance. The performance of the controller is verified by developing a prototype model of the converter and experimental results are presented. The results reveal the superiority of using a single dedicated IC for voltage regulation. The efficiency of the converter is found to be 91%.