POWER SUPPLY APPARATUS HAVING FLYBACK CONVERTER TYPE FOR STANDBY POWER REDUCTION AND COMPRISING AC CONDENSER VOLTAGE DIVIDING CIRCUIT

摘要

PURPOSE: A flyback converter type power supply apparatus for standby power reduction with an alternating current (AC) condenser voltage dividing circuit is provided to have high efficiency using an AC-DC converter as a voltage dividing circuit. CONSTITUTION: AC condensers divide AC voltage at an input. A standby power relay switch is connected between a power and the AC condensers. A rectifier rectifies an AC. A high frequency transformer transforms the input AC voltage according to a turn ratio. An MOSFET switch implements the zero voltage switching of a converter according to PWM signals. A snubber circuit reduces voltage spikes generated by the leakage inductance of the transformer when the MOSFET switch is turned off. [Reference numerals] (AA) Standby power relay; (BB) Rectifier; (CC) Snubber; (DD) Transformer; (EE) Diode