POWER SUPPLY DEVICE FOR TURNING ON AN SWITCHING UNIT USING AFTER RECEIVING AN ELECTRIC SOURCE SIGNAL AND SUPPLYING DRIVING VOLTAGE

摘要

PURPOSE: A power supply device for turning on an switching unit using after receiving an electric source signal and supplying driving voltage is provided to stably supply driving voltage by compulsorily loading the driving voltage.;CONSTITUTION: A power input part receives an electric source signal from a main board and outputs driving voltage. A drive circuit part(110) receives the driving voltage from the power input part and operates the driver circuit. A current input auxiliary section(130) receives the electric source signal and compulsively loads the driving voltage. The power input part comprises a first switching part(Q1) and a photo-coupler An auxiliary current input part comprises a second switching part(Q2) and a third switching part(Q3).;COPYRIGHT KIPO 2011