HALF-BRIDGE DC-DC CONVERTER USING ASYMMETRICAL PULSE-WIDTH MODULATION METHOD

摘要

PURPOSE: A half bridge DC-DC converter is provided to reduce voltage stress and switching loss by applying a driving pulse voltage with an asynchronous pulse width modulation method in a switching part. CONSTITUTION: A switching part(10) outputs the direct current voltage of a second level of a transformer secondary side. The switching part comprises a first switch(Q1) and a second switch(Q2). A voltage controlling part generates and controls a uniform level pulse signal after receiving a DC voltage of the secondary side. A switching driving circuit part receives a pulse signal generated in the voltage controlling part and generates the driving signal of the switching part. The switching driving circuit part comprises a first switching driving circuit part(31) driving the first switch and a second switching driving circuit part(32) driving the second switch.