The design of electronics ballast for long service life UV Lamps

An electronic ballast for 130W ultraviolet (UV) lamp, which is used in sewage treatment, is designed in this paper. The topology is constituted by Boost PFC, half-bridge inverter and LCC series-parallel resonant circuit etc. Also, a reliable control method based on PIC16F690 is programmed in the designed electronic ballast. Thus, soft starting and close-loop control of lamp power and the protection of open-circuit and short-circuit can be realized accurately. What is more, the calculation method of LCC series-parallel resonant circuit parameters is proposed. The experiment results used by the UV lamp (type G162SH) can meet the theoretical analysis exactly and its efficiency is as high as 94%.