Patent ID: 8502517
Filing Date: 2013-08-06
Classification: G05F,H02M

Abstract:
1. A controller for a power converter, comprising: an input voltage sensor to be coupled to receive an input signal representative of an input voltage of the power converter; a current sensor to be coupled to sense a current in a power switch; an oscillator coupled to generate a signal having a switching frequency; a timing and multiplier circuit coupled to the oscillator to adjust the switching frequency of the signal to be proportional to a value that is the input voltage multiplied by a time it takes the current in the power switch to change between two current values when then the power switch is in an on state; and a drive signal generator to be coupled to drive the power switch into the on state for an on time period and an off state for an off time period in response to the current in the power switch and in response to the signal having the switching frequency.