POWER SUPPLY DEVICE HAVING MULTIPLE OUTPUTS

摘要

A power supply device having multi-outputs independently controls an output voltage of a plurality of output circuits at a secondary side of a transformer and increases efficiency by reducing power loss. A first output circuit generates a first output power source about the power source delivered to a secondary side of a transformer. A first output controller(230) generates a first control signal controlling the electric power supply provided to a primary side of the transformer according to the first output power source. A second output circuit(240) generates a second output power source about the power source delivered to a secondary side of the transformer. A second output controller(260) controls the output of a second output power source. The second output circuit includes a second switch switching the current flow of the second output circuit. The second output controller blocks the second switch based on the first control signal, or controls the switching operation of the second switch by feeding back the second output power source.