Patent ID: 8598933

Claim:
A power converter operable to draw an input current that is in phase with an input voltage of the power converter and substantially proportional to a voltage of the input voltage of the power converter, the power converter comprising: an input inductor; a drive switch connected between the input inductor and ground, the drive switch operable to draw current through the input inductor when turned on; a waveform generator operable to selectively turn the drive switch on and off to cycle the drive switch; and a current shaping circuit operable to provide an on-time of the drive switch for a next cycle of the drive switch as a function of an input current decay time, a switching period of the waveform generator, and an output voltage of the power converter, wherein the waveform generator is responsive to the on-time provided by the current shaping circuit for selectively turning the drive switch on and off to cycle the drive switch as a function of the received on-time, and wherein the waveform generator has a predetermined delay between providing a re-load pulse in a re-load signal of the waveform generator and turning on the drive switch.