Patent ID: 6778410
Filing Date: 2004-08-17
Classification: H02M,Y02B

Abstract:
A converter, comprising:a transformer comprising a primary winding and a secondary winding, each comprising a first end, a second end and a tapper; a first inductor comprising a first end connected to the tapper of the primary winding; a second inductor comprising a first end connected to the first end of the primary winding, and a second end; a first capacitor comprising a first end connected to the second end of the primary winding, and a second end; a second capacitor comprising a first end connected to the second end of the primary winding, and a second end; a first switch comprising a first terminal connected to the second end of the second inductor, a second terminal connected to the second end of the first capacitor, a control terminal coupled to a control signal, and a parasitical diode connected between the first and second terminals thereof; a second switch comprising a first terminal connected to the second end of the second capacitor, a second terminal connected to the first terminal of the first switch and the second terminal of the second inductor, a control terminal coupled to the control signal and a parasitical diode connected between the first and second terminals thereof, wherein the first and second switches operate according to the control signal; and a first rectifying device and a second rectifying device, connected to the first end and the second end of the secondary winding respectively; wherein the first rectifying device turns on according to conduction of the first switch and the second rectifying device turns on according to conduction of the second switch.