A novel charge pump high power factor ac-ac converter

A novel charge pump ac/ac converter with power factor correction is presented in this paper. It features symmetrical circuit topology and ordinary PFM control. The input inductance current frequency in the converter is twice as in CIC-CPPFC (J. Qian and F.C. Lee, 2000), because two charge pump capacitors are charged and discharged alternately in the converter. Input inductance ripple current quantity is reduced. The operation principle of the converter circuit and high power factor condition are analyzed. The design considerations of circuit parameters are discussed. Experimental results verify theoretical analysis. It can attain the goal of realizing high power factor without specific controlled IC.