Patent ID: 7961483

Claim:
An integrated circuit package, comprising: an inductor switch; a switch terminal that is coupled to the inductor switch, wherein the inductor switch is turned on by an inductor switch control signal that has a frequency, and wherein a controller integrated circuit contained in the integrated circuit package adjusts the frequency such that an output current of a flyback converter remains constant; a feedback terminal that receives a feedback signal, wherein the feedback signal is derived from a voltage across a first inductor of the flyback converter, wherein the feedback signal is used by the controller integrated circuit to generate the inductor switch control signal, and wherein a primary inductor current flows through a second inductor of the flyback converter and through the inductor switch when the inductor switch is turned on; a power terminal through which power is provided to the controller integrated circuit; and a ground terminal through which the controller integrated circuit is grounded, wherein no terminal of the integrated circuit package other than the feedback terminal receives the feedback signal, and wherein the inductor switch is coupled to no terminals of the integrated circuit package other than the switch terminal and the ground terminal.