Patent ID: 9444348
Filing Date: 2016-09-13
CPC Classification: H02M,Y02B

Claim Text:
1. An electronic apparatus comprising: a system unit supplied with power to conduct an operation; and a power supply unit comprising a power control unit controlling output of standby power, and supplying the standby power to the system unit in a standby mode, wherein the power control unit comprises a pulse width modulation (PWM) generation unit generating a PWM signal and a first switching unit turned on to selectively supply power to the PWM generation unit in the standby mode and turned off so power is not supplied to the PWM generation unit in the standby mode, wherein the first switching unit is turned on in response to a detection of an external input signal, the external input signal being applied to the first switching unit when a level of the standby power output from the power supply unit is lower than a reference level, and the external input signal being applied to the first switching unit when an instruction is received to release of the system unit from the standby mode, wherein the external input signal is detected by using a state of charge of an electrolytic capacitor corresponding to the level of the standby power supplied to the system unit.