New AC/DC converter considering both inrush current limitation and start-up time

The main theme of this paper is to present a new AC/DC converter considering both inrush current limitation and start-up time. The presented converter consists of conventional power factor corrector, an auxiliary circuit and additional power device, e.g. MOSFET, which is connected in series with bulky capacitor of PFC. The power device operates in linear region during start-up process in order to limit inrush current and is fully turned on (i.e. in triode region) to reduce conduction power loss after start-up. The effectiveness of the proposed new AC/DC converter, including inrush current limitation and start up time improvement, will be confirmed by simulation and experimental results. It will be shown that the inrush current is 2A and startup time is less than 1 sec for 450 W AC/DC converter with input voltage = 230 V and output voltage = 12V.