Patent ID: 8760893

Claim:
A full bridge switching circuit comprising: a converter circuit including a first converter and a second converter, the first converter including a first transformer and a first switching element part to control the first transformer in response to a first switching signal, the second converter including a second transformer and a second switching element part to control the second transformer in response to a second switching signal, the first and second transformers being controlled by the first and second switching element parts to output first and second feedback signals under, respectively; a third switching element part including a third switching signal, the third switching element part being connected to the first and second transformers; and an IC circuit configured to generate an OR signal which results from an OR operation of a first control signal generated based on the first feedback signal and a second control signal generated based on the second feedback signal, the OR signal being fed back to the third switching signal, wherein the first and second transformers include respective secondary coils, and wherein the first converter includes: a first load which is connected to a first terminal of the secondary coil of the first transformer; a first diode which has an anode connected to a second terminal of the secondary coil of the first transformer and a cathode for outputting a first DC voltage signal; a first capacitor which is connected to the cathode of the first diode; and a first resistor which has a first resistor terminal connected to the cathode of the first diode and a second resistor terminal to output the first feedback signal based on the first DC voltage signal.