Research on Active Power Factor Correction of the Electronic Ballast for High-Pressure Sodium Lamps Based on L6563

In the recent years, there has been a growing interest in the design of high-pressure sodium lamp electronic ballast. Two measures are proposed to improve the power factor of high-pressure sodium lamp electronic ballasts from the definition of harmonic and power factor. And the basic principle of active power factor correction is also discussed in this paper. The active power factor correction circuit of the electronic ballast for high-pressure sodium lamps is successfully designed based on L6563 integrated chips. Experiment results show that the power factor of this electronic ballast is above 10% and its total harmonic distortion is lower than 0.990.