Patent ID: 7280376

Claim:
A flyback converter comprising: a transformer operable to receive a primary voltage input and generate a secondary voltage output; a switch electrically coupled in series with a primary side of the transformer, wherein the switch receives a control signal for controlling a duty cycle of the switch; and a controller operable to generate the control signal responsive to receiving a plurality of inputs, the inputs comprising the primary voltage input, a primary current input, and a temperature input, the controller comprising a sense and logic circuit to calculate a first value, indicative of the secondary voltage output, from the primary voltage input, and a second value, indicative of an error in the secondary voltage output, from the primary current input and the temperature input, the controller using the first and second values to generate the control signal, the controller calculating the first value using a proportional function, wherein the first value indicative of the secondary voltage output is proportional to the primary voltage input, a turns ratio of the transformer and the duty cycle, wherein the second value indicative of an error in the secondary voltage output estimates drops in voltages across components included in a secondary side of the converter, and wherein the components include a secondary winding of the transformer, a conductor path to a load, and a synchronous rectifier switch.