Patent ID: 7193864
Filing Date: 2007-03-20
Classification: H02M,Y02B

Abstract:
1. A switched mode power supply having: input terminals for receiving electric power, and output terminals for delivering an output signal, the output signal having an output voltage and an output current; wherein said input terminals are separated from said output terminals by an isolation barrier so that said input terminals are provided on a primary side of the isolation barrier and said output terminals are provided on a secondary side of the isolation barrier; said switched mode power supply comprising: a programmable digital circuit for controlling said four switching elements in dependence of at least one signal, wherein said programmable digital circuit is adapted to generate and send one pulse width modulated signal to each of said four switching elements; and said programmable digital circuit is further adapted to determine a phase shift in two of said four pulse width modulated signals with respect to the other two of said four pulse width modulated signals, said phase shift being determined based on a desired value of the duty cycle of said fullbridge.