Patent ID: 7864499
Filing Date: 2011-01-04
Classification: G06F,Y02D

Abstract:
1. A switching power supply saving system, the system comprising: a power interface configured to receive an external alternating current (AC) power; a power converting circuit configured to receive the AC power from the power interface, the power converting circuit capable of transforming the AC power to direct current (DC) power to supply power to a motherboard; a relay comprising a relay switch, the relay switch connected between the power interface and the power converting circuit; a relay driving circuit configured to drive the relay; a trigger configured to trigger the relay driving circuit; an AC-DC converter configured to receive the AC power from the power interface, the AC-DC converter capable of transforming the AC power to DC power to supply power to the relay, the relay driving circuit, and the trigger; and a timing sequence circuit; wherein upon a condition that the timing sequence circuit receives a power on signal, the timing sequence circuit is capable of controlling the relay driving circuit via the trigger to cause the relay to connect the power converting circuit to the power interface; and upon a condition that the timing sequence circuit receives a power off signal, the timing sequence circuit is capable of controlling the relay driving circuit via the trigger to cause the relay to cut off connection between the power converting circuit and the power interface.