Title :
Detection and regulation of CCFL current and open-lamp voltage while keeping floating condition of the lamp
Author :
Kim, Sang Kyung ; Han, Hee Seok ; Woo, Young Jin ; Cho, Gyu Hyeong
Author_Institution :
Dept. of Electr. Eng., Korea Adv. Inst. of Sci. & Technol., Daejeon, South Korea
fDate :
4/1/2006 12:00:00 AM
Abstract :
A new simple balanced circuitry using four printed circuit board trace capacitors effectively detects the cold-cathode fluorescent lamp current and the transformer voltage of the inverter without grounding either side of the lamp. The inverter employing this circuit is free from the problems caused by grounding one side of the lamp, and it provides a stable and wide dimming control as well as an open-lamp voltage regulation with a better efficacy.
Keywords :
cold-cathode tubes; fluorescent lamps; lighting control; resonant invertors; transformers; voltage control; cold-cathode fluorescent lamp current; cold-cathode tube; current sensing; dimming control; open-lamp voltage regulation; printed circuit board; resonant inverter; trace capacitor; transformer voltage; voltage sensing; Capacitors; Electronic ballasts; Fluorescent lamps; Grounding; Parasitic capacitance; Printed circuits; Resistors; Resonant inverters; Voltage control; Voltage measurement; Cold-cathode tube; current sensing; printed circuit board (PCB) capacitors; resonant inverters; voltage sensing;
Journal_Title :
Industrial Electronics, IEEE Transactions on
DOI :
10.1109/TIE.2006.870883
