Kindly help me make one issue devoted to------ CFL Ballast Circuits----viz. circuits to drive a 5/7/9 / 11W....upto 18 watts CFL from a 6 volts / 12v DC battery, or Solar Panel,(or 220 volts AC Mains) Believe me, this is a crying need ,of the day, all over.
The market is flooded with poor Lanterns, that work for 2 to 4 months then they can't be repaired even. Some makes are either high-cost/high Quality, or low cost - low quality. Custom Ballast ICs coming nowadays are no use, because they are obsolete in 4 to 6 to 12 months..
Also, the circuit must have a (SMPS) power supply too, with overcharging * under voltage cutoff, as the CFL goes black, on being switched at low voltage.
mail from SRM
I can try to help you, Please Explain your need. Which way do you want me to help you. Also please Visit these links.............
tacashi.tripod.com/elctrncs/inverter/inverter.htm
siliconchip.com.au/cms/A_102473/article.html
also look at many circuits using google, there are too many. go to .... google.com then enter these keywords 'no spelling mistakes'
cfl circuit
cfl circuits
look at all links, PDF links "right click save target" I can design with some SMPS type chips. Overcharging is only in Emergency Light Lamps. CFL's do not have this as they work on 230V. Make a more detailed specification. Then I can think more about it.
delabs
the problem is NOT that simple.............. problem is to RUN a CFL bulb, from a 6v/12v DC battery. Again, the problems are-----
1)Efficiency, of energy utilization, in the battery
2)Without using Custom LSIs(which go obsolete Unavailable in 6/12 months time and are replaced constantly ,by ever more sophisticated costlier models
3)Blackening of the ends of CFL, near electrodes
4)LIFE of CFL(supposedly--12000hours for European CFLs;8000hours for Advts;5000hours maybe ,reallife...
5)Simple Circuit, which can be easily repaired in the field, by non-technical people in village/small towns.
6)Low Cost--so, even the poorest person can buy use it
7)Fast Charging , of the Battery(out of 24 hours--likely to be used for 4/6/or 8 hours .So, it has to be charged in the balance of 24 hours...
8)Low Battery High Battery Cut-off; to prevent damage to battery CFL
9)Compliance with the Basic Ignition Data, furnished by CFL manufacturers.These are like----filament voltage,Ignition Voltage, Current etc
mail from SRM
some more links
edn.com/article/CA404521.html
ednasia.com/july04/di2.html
when you search with the keywords shown below see the Philips pdf application notes. They may meet your requirement. look at all links, PDF links "right click save target"
semiconductors.philips.com/acrobat/applicationnotes/AN99065_1.pdf
semiconductors.philips.com/acrobat/applicationnotes/AN98091_1.pdf
delabs
