Patent ID: 8310846

Claim:
Flyback switching converter comprising: an input circuit; a primary switching circuit comprising at least one semiconductor controlled switch; a driver circuit providing the necessary gate driving signal for said semiconductor controlled switch; a feedback circuit associated to said driver circuit and adapted to produce a feedback signal for the regulation of an output of said converter; a transformer comprising a primary winding and a plurality of secondary windings; a plurality of controlled rectifiers associated to said secondary windings; a plurality of output filters each one of which is associated to one of said controlled rectifiers; an integrated control circuit adapted to sense the voltage drop across one of said controlled rectifiers and to produce a driving signal for each one of said controlled rectifiers characterized in that said plurality of secondary windings comprises at least two secondary windings and said plurality of controlled rectifiers comprises at least two mosfet transistors, a first of said at least two secondary windings, having a first terminal connected to a first of said output filters, and a second terminal connected to a drain terminal of a first of said at least two power mosfets; a second of said at least two secondary windings, having a first terminal connected to a second of said output filters and to a source terminal of the first of said at least two power mosfets and a second terminal connected to a drain terminal of a second of said at least two power mosfets; the source terminal of the second of said at least two power mosfets being connected to a ground reference terminal of the circuit; said control circuit being associated to the second of said at least two power mosfets in order to sense the voltage drop across its drain and source terminals—and to the gate terminals of said first and second power mosfets in order to drive them with its output control signal.