Analysis, Design and Control of Zero Current Switching DC To DC Buck Converter

Abstract- A soft-switching buck converter is proposed for battery charging application. This converter can also be used with other low voltage miniature applications. Resonant inductor and capacitor helps to turn on-off the switch at zero current. This reduces switching losses in our conventional converter. In order to determine two (current) zero-cross points for switch-on and switch-off, the quasi-resonant state is employed. The quasi-resonant state is performed in full-waveform mode. This makes output voltage independent of output load variation. This leads to efficiency higher than conventional converter due to ZCS. Complete design-oriented mathematical calculations were done for zero current resonant switching converters. The performance of the proposed converter is evaluated on a 3.24-W (6 V/0.54 A) experimental prototype. Index Terms- Soft switching, Zero current switching (ZCS) I