New charge pump power factor correction electronic ballast with a wide range of line input voltage

A new charge pump power factor correction (CPPFC) electronic ballast with a wide line input voltage range is proposed in this paper. Circuit derivation and DC bus voltage stress at start-up mode are discussed. The average lamp current control with switching frequency modulation is developed to achieve constant lamp power operation and low crest factor. The proposed CPPFC electronic ballast is analyzed, implemented and evaluated. It features continuous line input current, low THD, constant lamp power operation, low crest factor and less switching current stress with low DC bus voltage stress for line voltages from 180 V to 265 V.