Compared to the more extensive use of electronic ballasts to magnetic ballasts, in terms of performance than its more outstanding. It can be said that ballast electronic ballast products of evolution. The electronic ballast is a frequency AC power into high frequency AC power converter, the basic working principle is: the frequency power through radio frequency interference (RFI) filter, full-wave rectification and passive (or active) Power Factor Correction (PPFC or APFC), the changes to the DC power supply. By DC / AC converter, the output of 20K-100KHZ high frequency AC power is applied to the LC series resonant circuit connected to the heating filament lamp, but so that the lamp "discharge" into the "on" state, and then into a light-emitting state, At this high frequency inductor current increases from limiting the role of the lamp to obtain the necessary to ensure the normal operation of the lamp voltage and lamp current, in order to improve reliability, often add a variety of protection circuits, such as abnormal protection, surge voltage and current protection temperature protection and so on. Changzhou lamp factory, Changzhou ballast, Changzhou trigger www.czleneng.com