High frequency quasi resonant SEPIC converter for wide range of operation

Abstract

This paper presents the comparison between the performance range of conventional and Quasi Resonant Single Ended Primary Inductor Converter (SEPIC) topology. Here the modified topology is the combination of the quasi resonant characteristics and the SEPIC converter topology. A Wide input (3.6-7.2V) and wide output (3-9) voltage ranges are obtained satisfactorily for the high frequency operation. Since converter designed for high frequency applications, Zero voltage Switching (ZVS) is ensured. By using this SEPIC topology the wide step up and step down conversion with high frequency is possible for low power applications. It will reduce the size, weight and losses of the converter and improves the transient response and it is effectively suitable for light load operations.

Design and Analysis of High-Efficient Driver Model for LED Luminaires

“…Due to the high energy storage requirements in circuits with low switching frequencies, it is difficult for circuits to downsize and respond quickly. Therefore, it is necessary to design circuits that re-duce energy storage requirements, are small in size and expand the efficient operating range [21].…”

A Soft-Switching SEPIC with Multi-Output Sources

“…Simulated and experimental results obtained from the proposed soft-switching SEPIC with multi-output sources are presented in Section 4.Finally, a conclusion is given in Section 5. In general, the soft-switching techniques can be classified into zero-voltage-switching (ZVS) and zero-current-switching (ZCS) techniques [12][13][14][15][16][17]. The ZVS or ZCS techniques drive the voltage or current of the power switch to zero before any switching action, and avoids the concurrent high voltage and high current in the switching transition.…”