VFF LAMP DRIVER
 

Schematic attached is in reference to "Feedback for low frequency PWM
regular" subject on NG "Sci.electronic.design".

Cheers,
Harry

VFF LAMP DRIVER
 

My lord, all this dancing baloney for a simple pulse width lamp driver?

Jim






--
"It is the mark of an educated mind to be able to entertain a thought
without accepting it."
--Aristotle


"HarryD" wrote in message
m...
Schematic attached is in reference to "Feedback for low frequency PWM
regular" subject on NG "Sci.electronic.design".

Cheers,
Harry

VFF LAMP DRIVER
 

"HarryD" wrote in message
m...
Schematic attached is in reference to "Feedback for low frequency PWM
regular" subject on NG "Sci.electronic.design".

Cheers,
Harry

Updated driver, controls RMS voltage across load to 9.15V +/-3% as input
changes from 9VDC to 15VDC.

Cheers,
Harry

VFF LAMP DRIVER
 

given that you have a filament lamp load and that you use R1 as a warming
resistor, it would be good to specify the actual load. Always good to spec
all the components so when folks try to build it and potentially find
problems, you can ask if it was built to print grin.

Instead of Foxit, try Cute-PDF Writer www.cutepdf.com Free and works with
vista. No adware either.

Oppie

"HarryD" wrote in message
m...

"HarryD" wrote in message
m...
Schematic attached is in reference to "Feedback for low frequency PWM
regular" subject on NG "Sci.electronic.design".

Cheers,
Harry

Updated driver, controls RMS voltage across load to 9.15V +/-3% as input
changes from 9VDC to 15VDC.

Cheers,
Harry

VFF LAMP DRIVER
 

"HarryD" wrote in message
m...
Schematic attached is in reference to "Feedback for low frequency PWM
regular" subject on NG "Sci.electronic.design".

Cheers,
Harry

Attached updated schematic using the UCC2803 and soft start added.

Cheers,
Harry