Patent ID: 7906871

Claim:
An apparatus to increase efficiency of electronic devices with redundant power supplies, the power supply comprising: a load module that determines that a load of an electronic device is operating at a power level below a predetermined power threshold by receiving a signal from the electronic device indicating that the electronic device is operating in a standby mode, wherein the electronic device is configured to receive power from two or more redundant power supplies, wherein each redundant power supply receives input power from one or more power sources and provides regulated output power to the load of the electronic device, the redundant power supplies redundantly providing power to the load electronic device such that if any one of the redundant power supplies fails, the remaining power supplies are capable of supplying power to the load electronic device while maintaining regulation of a voltage on a common bus connected to the load electronic device, and wherein changes in the power level are caused by changes in operation of the electronic device; a disconnection module comprising one or more relays that disconnects all but one of the two or more redundant power supplies from the one or more power sources, such that each redundant power supply that is disconnected does not receive the input power, in response to the load module determining that the load of the electronic device is operating at a power level below the predetermined power threshold; and a reconnection module that reconnects at least one redundant power supply that is disconnected to the one or more power sources in response to the load module determining that the load of the electronic device is operating at a power level above the predetermined power threshold.