Patent ID: 8000115

Claim:
A flyback converter controller, comprising: a secondary control circuit to be coupled to a switched element coupled to a second winding of a coupled inductor of a flyback converter, the secondary control circuit to be coupled across an output of the second winding to switch the switched element in response to a difference between an actual output value at the output of the second winding and a desired output value to force a current in a third winding of the coupled inductor that is representative of the difference between the actual output value at the output of the second winding and the desired output value; and a primary control circuit to be coupled to a primary switch coupled to a first winding of the coupled inductor, the primary control circuit to be coupled to receive the current forced in the third winding by the secondary control circuit, the primary control circuit coupled to switch the primary switch to regulate an output of the flyback converter coupled to the output of the second winding in response to the forced current.