Patent ID: 8564270
Filing Date: 2013-10-22
Classification: H02M,Y02B

Abstract:
1. A switching power converter comprising: a magnetic component coupled between an input voltage and an output voltage of the switching power converter; a switch coupled to the magnetic component to control current through the magnetic component, wherein the current increases when the switch is turned on and decreases to a substantially constant current level when the switch is turned off; and a controller configured to generate a control signal to turn on or turn off the switch, the switch turned on responsive to the control signal being in a first state and the switch turned off responsive to the control signal being in a second state, wherein the controller is configured to determine a dead time duration of a first switching cycle of the power converter, the dead time duration being a duration of time during which the current flowing into the magnetic component is at the substantially constant current level, wherein the controller is configured to determine a desired on-time duration of the switch for a second switching cycle of the power converter based on the dead time duration in the first switching cycle, the second switching cycle being subsequent to the first switching cycle, and wherein the controller is configured to generate, for the second switching cycle, the control signal in the first state for a duration of time that turns on the switch according to the desired on-time duration.