Construction of buildings, when full power is not required fluorescent continuous operation, the application dimmable electronic ballasts can further reduce power consumption w
ithin buildings to achieve energy savings. Most modern electronic ballast design and research, are recommended as driving the lamp resonant converter power circuits. Figure 1 shows a simplified circuit of the ballast. Two switches S: and S2 are switched alternatively, to provide a high frequency (typically less than 25 kHz and 100 kHz) of the rectangular wave AC voltage is applied to the load resonant circuit. Separated (broken) straight (stream) capacitor used to eliminate the DC voltage component. The basic concept is to utilize the resonant capacitor C, the voltage on the resonance, in order to stimulate the lamp arc to strike. Because of the high frequency excitation voltage, the lamp is essentially in a continuous conductive state, it can provide high-quality, flicker-free lighting effect.