Patent ID: 8319486
Filing Date: 2012-11-27
Classification: H02M

Abstract:
1. An extended switched-mode controller for controlling the switching of a switched-mode power converter during both non-transient and transient events, wherein the switched-mode power converter comprises at least one switch and at least one filter, and wherein the at least one filter comprises an inductor and an output capacitor, the extended switched-mode controller comprising: a comparator configured to receive a feedback signal from the output of the switched-mode power converter and to receive a reference signal; wherein said comparator is further configured to generate an error signal based at least in part on the difference between said feedback signal and said reference signal; a switched-mode controller configured to determine and generate standard switch control signals for the switched-mode power converter based at least in part on said error signal; and an auxiliary controller configured to receive said standard switch control signals from said switched-mode controller and to (1) pass said standard switch control signals to the switched-mode power converter during non-transient operation, and (2) provide auxiliary switch control signals to the switched-mode power converter during transient operation instead of said standard switch control signals; wherein said auxiliary controller is further configured to determine when to provide said auxiliary switch control signals and to determine what control signals to provide based at least in part on an auxiliary feedback input signal comprising at least one of: sensed converter voltages, converter currents, and said error signal; and wherein said auxiliary controller is a switching surface controller.