• Shubha Rao K
• Dr. Veena S chakravarthi

This paper presents a detailed analysis of the power conversion efficiency of a low voltage high-frequency buck converter operating in Continuous current mode. The Matlab-Simulink models of a buck converter with mathematical efficiency model are built to analyze the effect of the variation of power conversion efficiency with respect to load, input voltage, switching frequency and the equivalent resistance of LC filter. Maximum efficiency of 91.01% is obtained at 0.3A of load current. The variation of the efficiency of a buck converter with respect to switching frequency is studied under light load and heavy load conditions. It is observed that power loss mainly comprises of conduction losses under heavy load conditions and switching losses under light load conditions. The Power efficiency of the buck converter is reduced from 92.21% to 69.05% at 1MHz switching frequency as the load is reduced from 800mA to 2mA.

Switching mode power supply, Efficiency, Continuous current mode, Buck converter, Conduction losses

"ANALYSIS OF POWER CONVERSION EFFICIENCY OF BUCK CONVERTER OPERATING IN CONTINUOUS CURRENT MODE", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 2, page no.588-593, February-2019, Available :http://www.jetir.org/papers/JETIR1902676.pdf

"ANALYSIS OF POWER CONVERSION EFFICIENCY OF BUCK CONVERTER OPERATING IN CONTINUOUS CURRENT MODE", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 2, page no. pp588-593, February-2019, Available at : http://www.jetir.org/papers/JETIR1902676.pdf