Frequency dimmable electronic ballast for a 250W HPS lamp

In this paper, a simple circuit is proposed to achieve ability in dimming range, and to reduce the number of electronic components in the drive circuit, which helps to reduce its cost. Detailed analysis and design of a dimmable electronic-ballast high intensity discharge lamp circuit with frequency control are presented. A dimming technique for resonant circuit electronic ballast based on a variable frequency is introduced. Dimming is successfully accomplished and simulation results and experimental results are presented on high-frequency control electronic ballast.