Patent ID: 8643294

Claim:
A single stage electronic ballast with power factor correction, comprising: a first inductor, coupled between a first node and a second node; a first capacitor, coupled between said second node and a third node; a second inductor, coupled between said third node and a fourth node, wherein said fourth node couples to a negative end of a load; a second capacitor and a third inductor coupled in series between a positive end of said load and a fifth node; a fourth inductor coupled between said fifth node and a sixth node; a first switch coupled between said second node and said sixth node; a diode coupled between said third node and said sixth node; a third capacitor coupled between said fourth node and said sixth node; and a second switch and a fifth inductor coupled in series between said fourth node and said fifth node; wherein, said first node and said sixth node coupled to a positive end and a negative end of an input power source respectively, and wherein said first switch and said second switch are controlled with complementary switching so as to provide an output voltage in response to said input power source and a variation of said load.