Design of CCFL backlight inverters with frame & bar cores

LCD modules with backlighting lamps are widely used for Notebook PC's and LCD monitors. The DC/AC backlight inverter plays a crucial role in supplying the power for the lamp of these flat-panel displays. This application note describes extensively the design steps for CCFL backlight inverters, concentrating on the transformer. For a worked-out example with frame & bar cores, it results in core and winding design and thermal behaviour of the transformer. Additionally, the whole inverter circuit is modelled and a survey is given of core range and ferrite materials 3C90 and 3C91.

Date of release: January 2003
12nc : 9398 088 00611

* [435 KB]

For a paper copy of this publication please contact the nearest Ferroxcube sales office or one of our franchised distributors.
World-Wide Contacts