Patent ID: 8543848

Claim:
A method for reducing latency using a charging module when activating a power supply unit (PSU) among a plurality of PSUs in a power supply system, the method comprising: receiving, by the PSU from a power input feed, input power; receiving, from a supply bus shared by the plurality of PSUs, a first controlled signal designating a status of the PSU as standby; disabling, in response to the first controlled signal, a switching regulator of the PSU, wherein the switching regulator is configured to: receive continuous power from a power factor correction module, separate the continuous power into a plurality of discrete segments of power, and send the plurality of discrete segments of power to the supply bus; receiving, from a voltage rail of the supply bus, charge flowing through a resistor of the charging module to maintain a charge of an output capacitor of the switching regulator; receiving, from the supply bus, a second controlled signal designating the status of the PSU as active; enabling, in response to the second controlled signal, the switching regulator; in response to enabling the switching regulator: outputting a voltage from the PSU through the charging module to the voltage rail; and charging the output capacitor using the PSU.