Power supply fast turn-on and increased hold-up time within an electrical device

A networking device, comprising:

• a power supply system comprising:
• a first power supply unit and a second power supply unit configured to supply power in parallel to at least one electronic component via a power distribution bus;
• and
• a control unit coupled to the power supply unit configured to:
• receive a disable signal that indicates the first power supply unit should be disconnected from the at least one electronic component such that the first power supply unit does not supply power to the at least one electric component;
• disconnect, in response to the disable signal, the first power supply unit from a source power supply such that the first power supply unit does not supply power to the at least one electronic component;
• and
• charge, in response to the disable signal, a bulk capacitance of the first power supply unit to a predetermined level while the first power supply unit is disconnected from the source power supply by delivering power from the second power supply unit to the bulk capacitance of the first power supply unit via the power distribution bus while the second power supply unit supplies power to the at least one electronic component.

A networking device comprising:

• means for receiving a source power supply;
• a first means for outputting a regulated supply power derived from the source power supply to at least one electronic component over a power distribution bus;
• a second means for outputting a regulated supply power to the at least one electronic component over the power distribution bus in parallel with the first means;
• means for receiving a disable signal that indicates the regulated supply power corresponding to the first means should be not be output such that the at least one electronic component does not receive the regulated supply power;
• means for not outputting, in response to the disable signal, the regulated supply power corresponding to the first means;
• and
• means for charging, in response to the disable signal and by delivering the regulated supply power from the second means to a bulk capacitance of the first means to a predetermined level while not outputting the regulated supply power from the first means to the at least one electronic component, wherein the bulk capacitance is associated with the first means for outputting the regulated supply power.