Patent ID: 7675762

Claim:
A multi-voltage power supply including a transformer, a first output circuit to generate a first output voltage using a voltage transferred to a secondary winding of the transformer, and a first output voltage controller to control a voltage supplied to a primary winding of the transformer according to the first output voltage, the multi-voltage power supply comprising: second through N th output circuits to generate second through N th output voltages, respectively, using the voltage transferred to the secondary winding of the transformer; and second through N th output voltage controllers to control linearly outputting the second through N th output voltages, respectively, by feeding back the second through N th output voltages, wherein a K th (K is a positive integer greater than or equal to 2 and less than or equal to N) output circuit, which is one of the second through N th output circuits, comprises: a K th rectifier to generate a K th output voltage by rectifying the voltage transferred from the transformer; and a K th switch to linearly switch an output voltage of the K th rectifier according to a linear control signal of a K th output voltage controller, which is one of the second through N th output voltage controllers.