Flat Fluorescent Lamps(FFL)with dielectric barrier discharge is a new type of flat light source

which has a cheerful prospect as backlight for LCD. In this paper

the pin structure and internal structure of SG3525 were introduced

moreover

based on this chip

a method of designing the driving circuit for FFL was proposed. A flyback inverter was adopted in this design. A series of peak pulses with a width of 3~4 s and an amplitude of 2 000~2 500 V were created

when the input direct current voltage was 80~100 V. The circuit has been proved on a FFL prototype

the results show that this design method has some advantages such as easy

flexible

high efficient and cheap. Moreover

the FFLs brightness of 6 000 cd/m

2

and brightness uniformity of above 80% can be achieved by the circuit.