Patent ID: 8289731

Claim:
A controller for a flyback converter, comprising: a first converter coupled to said flyback converter and operable for receiving an auxiliary voltage from an auxiliary winding of a transformer and for generating a constant power voltage that is output to a flyback controller, wherein a secondary winding of said transformer is coupled to a load, and wherein said auxiliary voltage received by said first converter varies according to a load condition and said constant power voltage provided by said first converter to said flyback controller is constant independent of said load condition; said flyback controller coupled to said first converter, wherein said flyback controller is powered on by said constant power voltage and operable for controlling an output voltage of said flyback converter at said secondary winding of said transformer; and a single time base generator coupled to both said first converter and said flyback controller and operable for providing ramp signals to said first converter and said first flyback controller and clock signals to said first converter and said flyback controller.