The invention aims to provide an ultra-low
power consumption standby power supply with the function of
power factor compensation. In order to realize the aim, the ultra-low
power consumption standby power supply adopts the technical proposal that alternating-current commercial power is subjected to capacitive division to obtain adequate low-
voltage alternating current, and the low-
voltage alternating current is subjected to rectifying and wave-filtering, linear
voltage-stabilizing or
switching power supply voltage-stabilizing to obtain stable direct-
current voltage which is then supplied to a standby circuit of an electric appliance and taken as the
standby power supply. Due to adoption of capacitive division, the ultra-low
power consumption standby power supply has capacitive character in an
electric network and has the function of
power factor compensation. The ultra-low power consumption standby power supply solves the problem of overlarge standby power consumption of the prior standby power supply of various electric appliances, and is suitable to be taken as the standby power supply in the electric appliances of which standby circuits do not need to be isolated from the alternating-current power supply, such as air conditioners, electric refrigerators, electric fans with function of
remote control, electromagnetic ovens, duplicating machines,
facsimile apparatuses, televisions provided with thermal
chassis, computer displays and so on. The ultra-low power consumption standby power supply can completely replace the standby power supply of the prior household electrical appliances in various fields, so as to improve the
utilization rate of the power supply, can improve the
power factor and the
harmonic current of an alternating-current network, and has
positive function of reducing
energy consumption and relieving increasingly strained energy pressure and
environmental protection pressure.