Power supply device having multiple outputs

A power supply having a plurality of outputs are provided. The present invention is a first control signal for controlling the power supply supplied to the primary side of the transformer in accordance with the first output circuit, the first output power to generate a first output power with respect to the power delivered to the secondary side of the transformer, the transformer the method of claim power supply having a plurality of outputs including a first output control unit for generating, controlling the second output circuit and the output of the second output power source to generate a second output power relative to the power delivered to the secondary side of the transformer a second output control a second output circuit, and including the first and a second switch for switching the current flow of the second output circuit and the second output control section is blocked and the second switch based on the first control signal, claim characterized in that by feeding back the second output power source to control the switching operation of the second switch. According to the present invention, but having a plurality of output circuits in the transformer secondary side and to adjust the output voltage of each output circuit independently, it is possible to reduce the power loss and increases the efficiency, a simple configuration with multiple outputs and be output can be a stable control of the power of the.