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Fluorescent Light Circuits

12 Volt DC Fluorescent Lamp Driver: This fluorescent lamp driver uses a normal120 to 6V step-down transformer in reverse to step12V to about350-Volt to drive a lamp without the need to warm the filaments.  

40 Watt Fluorescent Lamp Inverter: This40W fluorescent lamp inverter allows you to run40W fluorescent tubes from any12V source capable of delivering3A.  

Black Light:

Dual MonoStable Drives Quasiresonant Inverter: 02/17/97  EDN-Design Ideas  / Circuit to power a fluorescent lamp from12V

Electronic Ballasts using the Cost Saving IR215X: application note AN-995 from International Rectifier  

Electronic Fluorescent Lamp Ballast: International Rectifier application note in PDF format  

Fluorescent Ballast: Design uses Passive PFC and Crest Factor Control. Also available in PDF format  

Fluorescent Desk Lamp: This circuit will power a 6 inch4-Watt fluorescent tube off a12 volt supply, consuming300 mA. It may also be powered by a suitably rated universal AC/DC adapter.  

Fluorescent Lamps, Ballasts, & Fixtures:

Half bridge Inverter has Variable Frequency: 10/09/97 EDN-Design Ideas

High-Efficiency Inverter Drives Compact Fluorescent : 08/19/02 Electronic Design - Ideas for Design  /  The inverter circuit shown is designed to drive a 7-W, four-pin compact fluorescent lamp (CFL) from a 12-V dc power supply. The main features of this inverter circuit include direct-drive capability, preheat for improved startup, high efficiency, and...  

Low Cost Converter Drives Fluorescent Tubes: 03/31/94 EDN-Design Ideas 

Low Cost Fluorescent Lighting System: lighting system suitable for videography 

Powering Fluorescent Lamps from Low Voltage DC!: inverter circuits  

Preheat Starter for Electronic ballast: 10/04/01 EDN-Design Ideas  / PDF contains multiple circuits - scroll to find the one of interest / Electronic ballasts for fluorescent lamps use various techniques to turn on the bulbs. The design usually involves a compromise between turn-on voltage and lamp life because the two are inversely related. One way to reach a reasonable compromise is to initially allow a momentary inrush current to warm the filaments, followed by a series of interrupted short circuits across the lamp that generate the required high voltage to trigger the fluorescent. With a preheated filament, the necessary strike potential reduces to half.  

Switching Regulator Controls CCFT: 02/16/95 EDN-Design Ideas  / You can control the current in a cold-cathode fluorescent tube (CCFT) and, hence, its brightness with a switching-regulator IC

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