Patent ID: 6909621

Claim:
An apparatus for controlling standby power of a system, the apparatus comprising: a control unit which controls an overall operation of the system; a power supply unit which converts an Alternating Current (AC) voltage into a Direct Current (DC) voltage and outputs the DC voltage to a load; a constant voltage unit which drops the DC output voltage of the power supply unit and provides the control unit with the dropped output voltage; a standby power generation unit which drops the DC output voltage of the power supply unit from a first value to a second value lower than the first value if the system is switched to a standby mode; and a feedback control unit which stops an operation of the power supply unit if the output DC voltage of the power supply unit exceeds a preset reference, wherein the standby power generation unit comprises: a voltage dropping element which drops the output DC voltage of the power supply unit to the second value where the system is in the standby mode, and a switching element which feeds back the output DC voltage of the power supply to the feedback control unit by being turned on by the control unit where the system is in the standby mode.