Title :
Series-parallel resonant forward inverter as a cold cathode fluorescent lamp (CCFL) driver
Author :
Chen, Weiyun Sophie
Author_Institution :
Texas Instruments, Manchester, NH, USA
Abstract :
A square wave, produced by two switches that operate complementarily, is applied to a series-parallel resonant forward inverter, which is composed of leakage inductors, a magnetizing inductor, an external series capacitor and the parasitic parallel capacitor, and filtered into a sinusoid waveform to drive a cold cathode fluorescent lamp (CCFL). The complete operation principle and characteristics of this resonant circuit are discussed in detail in this paper. Complete hardware implementation with the UCC3975 controller and system efficiency are presented too
Keywords :
capacitors; cold-cathode tubes; fluorescent lamps; inductors; invertors; lamp accessories; resonant power convertors; UCC3975 controller; cold cathode fluorescent lamp; cold cathode fluorescent lamp driver; external series capacitor; leakage inductors; magnetizing inductor; operation principle; parasitic parallel capacitor; resonant circuit; series-parallel resonant forward inverter; sinusoid waveform; Capacitors; Cathodes; Fluorescent lamps; Inductors; Inverters; Magnetic resonance; Magnetic separation; Magnetic switching; RLC circuits; Switches;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 2002. APEC 2002. Seventeenth Annual IEEE
Conference_Location :
Dallas, TX
Print_ISBN :
0-7803-7404-5
DOI :
10.1109/APEC.2002.989358
