Patent ID: 7906868

Claim:
A controller for regulating the output voltages in a multiple output flyback converter, the converter having a primary electronically controlled switch operatively associated with a primary winding and an active clamp and a plurality of secondary windings electromagnetically coupled to the primary winding, each of the secondary windings operatively associated with a particular one of a plurality of secondary electronically controlled switches and a respective one of a plurality of outputs, each of the plurality of outputs exhibiting an output voltage, the controller comprising: a plurality of error circuits, each of said plurality of error circuits coupled to a respective one of the particular outputs and arranged to output an error signal representative of the difference between a predetermined reference voltage and a function of the respective output voltage; a comparison circuit arranged to compare each of the output error signals with a time varying signal and output a plurality of comparison signals each reflecting the comparison of a respective one of the output error signals with the time varying signal; and a control circuit arranged to control the alternate closing and opening of the primary electronically controlled switch responsive to the dynamically detected output comparison signal associated with the largest of the differences between the predetermined reference voltage and the function of the respective output voltage and to control the closing and opening of each of the plurality of secondary electronically controlled switches responsive to the respective comparison signal.