Search for simple, high power factor, lamp ballast topologies, a more practical aspect of lighting electronics, is presented in Part II.Part I.Flourescent lamps have a special v-i characteristic.

• 后级灯管驱动采用共臂双灯管换流器，以低频方波驱动双灯管可避免产生音频共振现象，灯管操作于负压以延长灯管寿命。