Patent ID: 7075799

Claim:
A power supply, comprising: a transformer having a primary winding receiving an input voltage and having first and second windings on a secondary side of the transformer; a driver winding responsive to the input voltage; a first power transistor having a first conduction terminal coupled to a first end of the first winding, a second conduction terminal coupled to a ground terminal, and a control terminal coupled to a first end of the second winding; a second power transistor having a first conduction terminal coupled to a second end of the first winding, a second conduction terminal coupled to the ground terminal, and a control terminal coupled to a second end of the second winding; a first driver transistor having a first conduction terminal coupled to the control terminal of the first power transistor, a second conduction terminal coupled to the ground terminal, and a control terminal coupled to a first end of the driver winding; a second driver transistor having a first conduction terminal coupled to the control terminal of the second power transistor, a second conduction terminal coupled to the ground terminal, and a control terminal coupled to a second end of the driver winding; a first inductor coupled between the first end of the first winding and an output of the power supply; and a second inductor coupled between the second end of the first winding and the output of the power supply.