Patent ID: 8541990

Claim:
A power conversion controller having a novel power factor correction mechanism, comprising: a normalization unit, using an auto gain control mechanism to generate a normalized signal and a normalizing gain according to a line voltage, wherein said normalized signal is equal to a product of said line voltage and said normalizing gain, and said normalizing gain is proportional to a reciprocal of an amplitude of said line voltage, a reference current generation unit, coupled to said normalization unit to generate a reference current signal by performing an arithmetic operation, wherein said arithmetic operation involves said normalized signal wherein said reference current generation unit implements selecting said arithmetic operation from a group that includes both S REFC =V NORM ×S G and S REFC =V NORM , wherein S REFC represents said reference current signal, V NORM represents said normalized signal, and S G represents said normalizing gain; and a gate drive signal generation unit, used to generate a gate drive signal, wherein a duty of said gate drive signal is determined by a voltage comparison of said reference current signal and a current sensing signal.