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This paper proposes a synchronous rectification (SR) control scheme for LLC resonant converter by digital controller. In the proposed SR control scheme, conduction detector circuit senses the drain-source voltage of secondary SR switches to detect the state of paralleled body diode. Digital controller tunes the turn-on and turn-off time of SR switches depending on conduction detector circuit output...
Recently, efficiency improvement has been noted with the rapidly increasing consumption of energy. The diode losses is the main cause of efficiency decrease in bridge rectifier of conventional PFC circuit, it can not be neglected. Therefore bridgeless PFC circuit has been focused. In this research, the various bridgeless PFC circuits are analyzed. The results of switching noise are compared and efficiency...
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