Patent ID: 8183841

Claim:
A power supply controller comprising: a plurality of PWM circuits configured to form a plurality of PWM drive signals with each PWM circuit configured to form a PWM drive signal of the plurality of PWM drive signals to operate a power switch to regulate an output voltage to a desired value wherein each PWM drive signal is skewed in phase relative to other PWM drive signals of the plurality of PWM drive signals; a reference circuit configured to form a reference signal; a feedback input configured to receive a feedback signal that is representative of the output voltage wherein the plurality of PWM circuits use the feedback signal in a control loop and use the reference signal to control a duty cycle of the PWM drive signals; a first circuit configured to receive a plurality of voltage requirement signals from a computer and responsively form a first control signal indicating one of an increase or decrease in voltage required by the computer, and configured to form a second signal indicating different one of the increase or decrease in voltage required by the computer; and a logic circuit configured to receive the first control signal and inhibit forming at least one PWM drive signal of the plurality of PWM drive signals responsively to the first control signal indicating a decrease in voltage required by the computer and independently of the value of the feedback signal, and further including the logic circuit configured to subsequently re-enable the formation of the at least one PWM drive signal of the plurality of PWM drive signals responsively to the second control signal.