Patent ID: 8879290
Filing Date: 2014-11-04
Classification: H02M

Abstract:
1. A controller for a power converter, comprising: a feedback signal processor configured to generate a plurality of intermediate signals based on a plurality of feedback signals from the power converter; a region selector configured to detect different regions of each cycle of the power converter, and output region information indicating a current region of the power converter; a control signal selector configured to generate a plurality of control signals, wherein, for each control signal, the control signal selector selects at least one of the intermediate signals according to the region information from the region selector; a control core configured to receive the plurality of control signals and generate a plurality of duty-ratio signals based on the received control signals; and a signal distributor configured to distribute the plurality of duty-ratio signals to switches in the power converter according to the region information from the region selector; wherein, for each control signal, the control signal selector selects the at least one intermediate signal by following a logic table in accordance with the region information from the region selector; and wherein the signal distributor distributes the plurality of duty-ratio signals by following a logic table in accordance with the region information from the region selector.