PROTECTING APPARATUS AND METHOD FOR HALF/FULL BRIDGE CIRCUIT WHICH HAVE THE FIRST SWITCHING UNIT AND THE SECOND SWITCHING UNIT CONNECTED TO THE FIRST SWITCHING UNIT IN SERIES IN IMAGE FORMING APPARATUS

摘要

PURPOSE: A protecting apparatus and a method for a half/full bridge circuit which have a first switching unit and a second switching unit connected to the first switching unit in series in an image forming apparatus are provided to stop a switch controller by installing an arm short detection unit. CONSTITUTION: In a protecting apparatus and a method for a half/full bridge circuit which have a first switching unit and a second switching unit connected to the first switching unit in series in an image forming apparatus, a operation processing unit(110) generates a first PWM signal and outputs it. A dead time insertion part(120) delays a time when the first PWM signal and second PWM signal are reached from a low signal to a high signal. A switching controller(130) compares a first signal with a second signal to generate first and second driving signals. An arm short detection unit(140) stops the switch controller by outputting a disable signal to the switch controller according to the first and second driving signal.