Patent ID: 8379413
Filing Date: 2013-02-19
Classification: H02M

Abstract:
1. A power converter, comprising: a transformer having a primary winding coupled to a power source and a secondary winding coupled to a load; and a signal generator operable for generating a sawtooth wave signal, wherein said transformer is configured to operate in a plurality of switching cycles, and at least one of said switching cycles comprises a charging period, a discharging period, and an adjusting period, wherein during said charging period said sawtooth wave signal increases from a predetermined reference voltage level to a first level, wherein during said discharging period said sawtooth wave signal decreases from said first level to a second level that is lower than said predetermined voltage level, wherein during said adjusting period said sawtooth wave signal increases from said second level to said predetermined reference voltage level, wherein during said charging period said transformer is powered by said power source and a current flowing through said primary winding increases, wherein during said discharging period said transformer discharges to power said load and a current flowing through said secondary winding decreases, and wherein a ratio of a duration of said discharging period to a total duration of said charging period, said discharging period and said adjusting period is constant.