Patent ID: 8645739

Claim:
A power supply system for an information handling system, the power supply system comprising: a plurality of power supply units electrically coupled via an output line, each power supply unit comprising: a first input line for receiving power from a power source, a second input line for receiving a feedback signal from the output line, an internal voltage rail, a load share bus for communication with the plurality of power supply units, and wherein each power supply unit is configured to supply an output voltage to the output line; wherein each power supply unit receives, over the second input line, a feedback signal indicative of a voltage of the output line and receives, over the load share bus, a programmed voltage signal indicative of a supply voltage required for the output line; wherein at least one of the plurality of power supply units is configured to enter a standby mode where: the first input line of the at least one power supply unit continues to receive power from a power source, the internal voltage rail of the at least one power supply unit is enabled, and an output voltage is not supplied to the output line of the at least one power supply unit; wherein at least one of the plurality of power supply units is configured to transition from the standby mode to an active mode by engaging the internal voltage rail within the at least one of the plurality of power supply units with the output line, wherein the transition from the standby mode to the active mode is based, at least in part, on the feedback signal and the programmed voltage signal; wherein at least two of the plurality of power supply units are configured to transition to a load sharing mode where the power supply units cooperatively supply an output voltage to the output line, wherein the transitioning is based, at least in part, on the feedback signal and the programmed voltage signal.