Patent ID: 7796409

Claim:
A power converter for converting an input voltage (Vin) into an output voltage (Vout), comprising: a primary winding having first and second terminals, a center tap arranged between the first and second terminals and connected to a first supply potential; a secondary winding magnetically coupled to the primary winding for providing at least one output voltage; a first controllable switch connected between a second supply potential and the first terminal; a second controllable switch connected between the second supply potential and the second terminal; a third controllable switch connected between the second supply potential and the first terminal; a fourth controllable switch connected between the second supply potential and the second terminal; and a control unit for controlling the switches such that (i) the first, the third, the second and the fourth switches or (ii) the fourth, the second, the third and the first switches are turned on successively where at any time a maximum of one of the first, the second, the third or the fourth switches is turned on, where a dead time occurs between turn on periods for the first and the third switches, and where another dead time occurs between turn on periods for the second and the fourth switches.