POWER SUPPLY SYSTEM FOR POWER SAVING USING AUXILIARY POWER SUPPLY SWITCH

摘要

PURPOSE: A power supply system is provided to reduce power consumption while an electronic device is operated by forming an auxiliary power switch between an AC input part and an auxiliary power part. CONSTITUTION: An AC input part(10) receives the AC power from an external power supply. A main power switch part(20) opens and closes the AC power source inputted to the AC input part. A main power supply(30) supplies the DC power supply by rectifying the inputted AC voltage. A DC output part(40) outputs the DC power provided in the main power supply to a load. A first drive circuit part(70a) operates the main power switch part. A controller(60) controls the first drive circuit part. An auxiliary power part(50) supplies the DC power to the first drive circuit part and the controller. A sensor part(80) senses the DC power. An auxiliary power switch(90) opens and closes the AC power inputted to the auxiliary power part. A second driver circuit part(70b) operates the auxiliary power switch.