Patent ID: 11876456
Assignee: ALPHA AND OMEGA SEMICONDUCTOR INTERNATIONAL LP
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 3:
4. The controller of claim 1, wherein each of the first and second PWM signals comprises an up-ramp portion and a down-ramp portion, and wherein:
the buck control circuit is configured to generate the first PWM signal to regulate the up-ramp portion of the first PWM signal to cause the first phase current to flow from the input node to the output node to store energy in the inductor, the buck control circuit generating the down-ramp portion of the first PWM signal to deliver the stored energy in the inductor to the output capacitor to regulate the output node to the first voltage value; and
the boost control circuit is configured to generate the second PWM signal to regulate the down-ramp portion of the second PWM signal to cause the second phase current to flow from the output node to the input node to deliver the stored charges in the output capacitor to the inductor, the boost control circuit generating the up-ramp portion of the second PWM signal to deliver the stored energy in the inductor to the input node, there by returning the stored charge in the output capacitor to the input node and driving the output node to the second voltage value.