Abstract: To design a novel power factor correction (PFC) controller integrated circuit, the principle of the PFC pre-regulator is introduced based on the stable operating station of a boost converter in continuous current mode (CCM). The relationships between duty ratio and input current are analyzed in detail, and the requirement for the regulating voltage is also discussed. Matlab simulation results confirm the relationships among the duty-ratio, regulating voltage, slope of input current, input current, and output voltage of the boost converter. The mechanism of the key part of the PFC pre-regulator, the block of regulating voltage VM, is given out, and a kind of VM multiplier integrated circuit is proposed. The whole system simulation results based on HSPICE show that the proposed PFC pro-regulator has good PFC performance.