Patent ID: 6671143
Filing Date: 2003-12-30
Classification: H02M,Y02B

Abstract:
A method of limiting a current through a reactive element in a voltage converter, comprising:switching current from a supply through a reactive element in accordance with a switch control signal for forming a regulated output voltage in a feedback loop; sensing a first signal that is representative of a current passing through the reactive element in a first direction; sensing a voltage that is representative of the output voltage of the voltage converter; forming a second signal that is representative of a difference between the output voltage and a desired voltage; forming a third signal that is representative of a level of current passing through the reactive element in a second direction opposite the first direction; and comparing a selected one of the first, second and third signals to a ramp signal for forming the switch control signal wherein the selected one is selected according to the relative magnitudes of the first, second and third signals.