Patent ID: 8030906
Filing Date: 2011-10-04
Classification: H03K

Abstract:
1. A switching power source apparatus, comprising: a storage unit to store energy obtained from input power supplied to the storage unit, and to output at least some of the stored energy as output power; a first switch; a second switch connected in series with the first switch, the series connection of the first switch and the second switch being connected to the storage unit; and a voltage clamp unit to clamp a level of a voltage applied across the series connection of the first switch and the second switch to a predetermined voltage or less, wherein to supply the input power to the storage unit, the first switch is turned on while the second switch is still turned off, and then the second switch is turned on after the first switch has been turned on to supply the input power to the storage unit from the series connection of the first switch and the second switch, and wherein the second switch has a withstanding voltage equal to or greater than a predetermined value that is high enough to withstand a maximum voltage applied across the series connection of the first switch and the second switch during operation of the switching power source apparatus.