Patent ID: 7336507
Filing Date: 2008-02-26
Classification: H02M

Abstract:
1. A power supply comprising: a transformer having a primary side and a secondary side; a first output line derived from a first point on the secondary side, the first output line outputting a first voltage; a second output line derived from a second point on the secondary side, the second output line outputting a second voltage lower than the first voltage; a controller that controls an amount of current flowing in the primary side based on the second voltage so that the second voltage is maintained at a prescribed voltage; a current bypass circuit that controls current flowing in the first output line to flow in the second output line when a potential difference between the first voltage and the second voltage exceeds a prescribed value; and a storage unit connected between the current bypass circuit and the second output line, wherein the storage unit stores electric charges when current is flowing from the first output line to the second output line whereas the storage unit supplies the electric charges stored therein for the second output line when current is prevented from flowing from the first line to the second output line.