Patent ID: 7675761

Claim:
A flyback power supply circuit, comprising: an energy transfer element including a primary winding and first and second output windings coupled to produce first and second output values, respectively; a primary switch coupled to the primary winding; a control circuit coupled to the primary switch to regulate a sum of the first and second output values; and a steering circuit including first and second output switches coupled to the first and second output windings, respectively, wherein the steering circuit is coupled to sense both the first output value and the second output value and wherein the steering circuit is responsive to a ratio of the first output value to the second output value to regulate the ratio of the first output value to the second output value, wherein the first output switch is coupled to block current through the first output winding and the second output switch is coupled to block current through second output winding, wherein at least one of the first and second output switches is coupled to be closed when the primary switch is opened.