Patent ID: 9077246
Filing Date: 2015-07-07
Classification: H02M

Abstract:
1. A flyback converter, comprising: a power supply unit supplying input power; a transformer unit including a first transformer converting a first primary current from the power supply unit into a first secondary current and a second transformer converting a second primary current from the power supply unit into a second secondary current; a main switch unit including a first main switch intermitting the first primary current flowing in a primary winding of the first transformer and a second main switch intermitting the second primary current flowing in a primary winding of the second transformer; an auxiliary switch unit including a first auxiliary switch forming a transfer path for dump power present in the primary winding of the first transformer before the first main switch is switched on and a second auxiliary switch forming a transfer path for dump power present in the primary winding of the second transformer before the second main switch is switched on; and an auxiliary inductor unit including a first auxiliary inductor adjusting an amount of current flowing in the first auxiliary switch during a switching operation of the first auxiliary switch and a second auxiliary inductor adjusting an amount of current flowing in the second auxiliary switch during a switching operation of the second auxiliary switch, wherein the first main switch and the second main switch perform a switching operation while having a predetermined phase difference therebetween, and wherein the first main switch, the first auxiliary inductor, and the first auxiliary switch are disposed in series, and each of both nodes of the first auxiliary inductor is directly connected to the first main switch and the first auxiliary switch, respectively, and the second main switch, the second auxiliary inductor, and the second auxiliary switch are disposed in series, and each of both nodes of the second auxiliary inductor is directly connected to the second main switch and the second auxiliary switch, respectively.