대기모드 기능을 내장한 전원 장치 제어용 PWM IC 설계

Abstract

In this paper, we designed the off-line PWM(Pulse width modulation) control IC for flyback type power converter to reduce the standby power consumption. In normal state, this off-line PWM IC generates the output pulse with 4060 ㎑ frequency and duty ratio of 2088 %. When SMPS operates in standby mode, this IC generates the output pulse with 33㎑ frequency and duty ratio of 1 %. SPICE simulation was performed to verify the standby power consumption of the power converter with designed of-line PWM IC. Power converter with designed off-line PWM IC consumes less than 0.3W when it operates in standby mode condition.