Patent ID: 8355266

Claim:
A controller for use in a power converter, comprising: a control circuit to be coupled to a current controller coupled to an energy transfer element, wherein a first, second or third current is enabled in the current controller in response to the control circuit, wherein the first current is substantially zero, the second current is greater than the third current, and the third current is greater than the first current, wherein the third current is controlled to only partially discharge a capacitance coupled to a terminal coupled between the energy transfer element and the current controller; a first feedback circuit coupled to the control circuit and coupled to generate a first feedback signal representative of an output of the power converter while the first current is enabled in the current controller after a full discharge pulse of current through the current controller; and a second feedback circuit coupled to the control circuit and coupled to generate a second feedback signal representative of the output of the power converter while the first current is enabled in the controller after a partial discharge pulse of current through the current controller.