Patent ID: 8817497
Filing Date: 2014-08-26
Classification: H02M

Abstract:
1. A switching power converter comprising: a transformer including parasitic capacitance; a first switch coupled to the transformer and configured to couple or decouple a load to or from a power source via the transformer; a switch controller coupled to the first switch and configured to generate a switch drive signal for turning on or off the first switch according to switching cycles; a bypass circuit configured to provide a bypass path for the parasitic capacitance of the transformer; and a bypass controller coupled to the bypass circuit and the switch controller, the bypass controller receiving a control interface signal from the switch controller and configured to generate a bypass control signal for enabling or disabling the bypass circuit based upon the control interface signal, wherein the bypass controller generates the bypass control signal to enable the bypass circuit after a transformer reset point within each switching cycle of the switching power converter, the transformer reset point corresponding to when current through the load equals zero in each switching cycle.