Patent ID: 6614131
Filing Date: 2003-09-02
Classification: H02M

Abstract:
A switched mode power supply, comprising:a first circuit provided with a primary winding of a transformer to which a pulse voltage is applied, at least one second circuit comprising at least one secondary winding of said transformer, at least one reactor provided with a magnetic core and having a terminal connected to a first terminal of said at least one secondary winding, at least one filter provided with input and output terminals and a first diode connected in parallel to the input terminals of the filter; the other terminal of said at least one reactor is connected to a first terminal of said first diode; and a second diode having a first terminal connected to a second terminal of said first diode and a second terminal connected to a second terminal of said at least one secondary winding and a control circuit coupled to a output terminal of said filter and to the second terminal of said at least one secondary winding, said control circuit adapted to generate a current to reset said magnetic core of said at least one reactor, the reset current flowing from the secondary winding and into the control circuit.