Patent ID: 8222882
Filing Date: 2012-07-17
Classification: H02M

Abstract:
1. An integrated circuit controller for a power supply, the controller comprising: a logic block to generate a drive signal in response to a clock signal, wherein the drive signal is to be coupled to control switching of a power switch of the power supply to regulate an output of the power supply; and an oscillator coupled to generate the clock signal having a frequency that decreases responsive to a time period of the drive signal, wherein a decrease in the time period of the drive signal is representative of an increase in an input voltage of the power supply, wherein the oscillator generates a waveform having an amplitude swing, wherein the amplitude swing is a difference between an upper reference and a lower reference of the oscillator, wherein the frequency of the clock signal is responsive to the amplitude swing, and wherein the oscillator adjusts at least one of the references responsive to the time period of the drive signal.