Maker Pro
Maker Pro

inverter for four CCFL tubes

W

World Lamp

Jan 1, 1970
0
Hello

I am trying to develop a lamp cap system special for the 3rd world.
I am struggling to find the right kind of schematic for a inverter to feed
three CCFL lamp tubes out of 12 volt DC
This schematic must be as simple as possible.
But it need to produce the right type of sinus that does not damage the lamp
And must have the right start up power and work power.

The transformation must be out a standard household power-adapter.
A transformer with a single primary and secondary coil.

http://www.appropedia.org/3rd_world_CCFL_lamp_(2007_model)

I do not know match people that know match about the inverter technique.

Who know how to make this as simple as possible.

Best regards

Stef , Netherlands
 
V

Victor Roberts

Jan 1, 1970
0
Hello

I am trying to develop a lamp cap system special for the 3rd world.
I am struggling to find the right kind of schematic for a inverter to feed
three CCFL lamp tubes out of 12 volt DC
This schematic must be as simple as possible.
But it need to produce the right type of sinus that does not damage the lamp
And must have the right start up power and work power.

The transformation must be out a standard household power-adapter.
A transformer with a single primary and secondary coil.

http://www.appropedia.org/3rd_world_CCFL_lamp_(2007_model)

I do not know match people that know match about the inverter technique.

Who know how to make this as simple as possible.

Best regards

Stef , Netherlands

You may want to download free software called Ballast
Designer from International Rectifier, www.irf.com. You
simply put in your power source and lamp type and out pops
a ballast design. While the software does not support 12
VDC input power, they do have a circuit for 24 VDC, which
should give you an idea of how a ballast is designed.

One additional complication is that all the designs are
based on IR ballast control ICs, so these ballasts will cost
more than a simple discrete circuit. (This is expected from
free software provided by a company that sells ballast
control ICs.) However, by studying these designs you can
get an idea about how a ballast works. IR also has various
application notes that discuss ballast design basics.

Another source of information are the thousands of patents
for electronic fluorescent lamp ballasts. Many of these
have expired or lapsed due to non-payment of the maintenance
fees, so you would be free to use their designs.

Finally, Don Klipstein, a regular here, maintains a web site
about various aspects of lighting. See
http://members.misty.com/don/index.html. At one time Don's
web site had circuit diagrams for simple electronic
ballasts, including at least one design for 12 VDC input.
However, I can't seem to find that section of the web site
this morning. Perhaps Don will step in here and explain
where the diagrams are.

--
Vic Roberts
http://www.RobertsResearchInc.com
To reply via e-mail:
replace xxx with vdr in the Reply to: address
or use e-mail address listed at the Web site.

This information is provided for educational purposes only.
It may not be used in any publication or posted on any Web
site without written permission.
 
D

Don Klipstein

Jan 1, 1970
0
You may want to download free software called Ballast
Designer from International Rectifier, www.irf.com. You
simply put in your power source and lamp type and out pops
a ballast design. While the software does not support 12
VDC input power, they do have a circuit for 24 VDC, which
should give you an idea of how a ballast is designed.

One additional complication is that all the designs are
based on IR ballast control ICs, so these ballasts will cost
more than a simple discrete circuit. (This is expected from
free software provided by a company that sells ballast
control ICs.) However, by studying these designs you can
get an idea about how a ballast works. IR also has various
application notes that discuss ballast design basics.

Another source of information are the thousands of patents
for electronic fluorescent lamp ballasts. Many of these
have expired or lapsed due to non-payment of the maintenance
fees, so you would be free to use their designs.

Finally, Don Klipstein, a regular here, maintains a web site
about various aspects of lighting. See
http://members.misty.com/don/index.html. At one time Don's
web site had circuit diagrams for simple electronic
ballasts, including at least one design for 12 VDC input.
However, I can't seem to find that section of the web site
this morning. Perhaps Don will step in here and explain
where the diagrams are.

Sorry to take so long - rough weekend:

http://members.misty.com/don/eb.html

- Don Klipstein ([email protected])
 
Top