Title :
Primary-side charge-pump dimming controller for the cold-cathode fluorescent lamp ballast
Author :
Hsieh, Guan-Chyun ; Lin, ChimHung ; Lin, Chang-Hua ; Hsieh, Hung-I
Author_Institution :
Dept. of Electron. Eng., Nat. Taiwan Univ. of Sci. & Technol., Taipei, Taiwan
Abstract :
A primary-side charge-pump controller built into a cold-cathode fluorescent lamp (CCFL) ballast is presented for widening the dimmer range while stabilizing the dynamic feedback regulation for the lamp luminance in uniform distribution without thermometer effect. The proposed controller consists of a linear error amplifier for dynamic feedback control regulation and a shunt amplifier for dimmer control. A dimming strategy is explored for extending the dimming range above 1:50 far higher than the conventional 1:10. Besides, floating the CCFL alone at the secondary side also raises the lamp efficiency without parasitic effect
Keywords :
DC-AC power convertors; cathodes; feedback; fluorescent lamps; invertors; lamp accessories; lighting control; voltage control; cold-cathode fluorescent lamp ballast; dimmer control; dynamic feedback control regulation; dynamic feedback regulation stabilisation; electronic ballast; lamp efficiency improvement; lamp luminance; linear error amplifier; primary-side charge-pump dimming controller; shunt amplifier; Charge pumps; Control systems; Electronic ballasts; Error correction; Feedback control; Fluorescent lamps; Inverters; Linear feedback control systems; Telephony; Topology;
Conference_Titel :
TENCON 2001. Proceedings of IEEE Region 10 International Conference on Electrical and Electronic Technology
Print_ISBN :
0-7803-7101-1
DOI :
10.1109/TENCON.2001.949685
