【应用笔记】智能多功率数字镇流器荧光灯 AN2640 Application note Intelligent multipower digital ballast for fluorescent lamps Introduction Fluorescent lamps are highly popular due to their luminous efficiency, long life and color rendering. These lamps need external circuitry to compensate for their negative resistance characteristic. This circuitry is called "ballast". The simplest ballast is a magnetic inductor connected in series at the lamp. The electronic ballast with respe……