Patent ID: 6014321
Filing Date: 2000-01-11
Classification: H02J,H02M

Abstract:
An electronic switched-mode power supply for supplying power to an electrical load (16) from an AC or DC voltage source (4) of different voltage levels, said power supply comprising:a primary switched-mode flyback converter which includes a first diode, a first transistor, at least two feedback capacitors, and a transformer (1) having its secondary winding (13) connected in series with an electrical energy-absorbing device and said first diode, while its primary winding is connected in series with the collector-emitter circuit of said first transistor, the base of the first transistor being connected to one pole of the voltage source, wherein during the transformer discharge cycle, said at least two feedback capacitors are connected to the secondary winding of the transformer, acting as parallel-connected capacitors, and, during the transformer charge cycle, said first transistor having its base connected to the one end of the secondary winding of the transformer through said at least two feedback capacitors, acting as serially connected capacitors.