START-UP CIRCUIT FOR POWER SUPPLY

摘要

PURPOSE: A starting circuit of a power supply unit is provided to supply stand-by power to an electronic device by using electrical energy charged in a charge unit. CONSTITUTION: A starting current feed port(110) comprises a first resistance unit(111), a thyristor(112), and a time constant circuit unit(T). A constant voltage unit restricts a gate voltage of the thyristor. A switching power unit changes a power source put in an electric device into a charging voltage. A charge unit(150) is connected with a cathode of the thyristor and the switching power unit and is charged by an output current of thereof. A recharge control unit(140) controls the charge of the charge unit by being connected between the switching power unit and the charge unit.