In a power converter, a primary coil of a transformer receives an input voltage, and a first terminal of a switch is coupled to the primary coil. An output unit includes a secondary coil of the transformer, and outputs an output voltage to which the input voltage is converted by the transformer. A switching...http://www.google.de/patents/US8139381?utm_source=gb-gplus-sharePatent US8139381 - Power converter, and switching controller and driving method thereof
