Buck boost / step up circuit?

[stevrosty]

Hi All,

I need help on a circuit suggestion I've been researching.

Im looking for any ideas about getting 9V input (from some AA batteries) up to about 45-50V to supply a 45v constant current device. IE a big LED. Its only used in pulse operation, so the LED will draw most of its current form a large capacitor that will sit on the output of this step-up/boost circuit Im looking for.

Ive looked through lots of datasheets from different IC manufacturers of DC-DC converters, but no luck. Any links to help or someone who has had experience of this type of CCT would be really appreciated!

Thanks
)

 

[BobK]

Hi, and welcome to the forum.

TI has a great little online app that will design a switching power supply to your specifications:

http://www.ti.com/lsds/ti/analog/webench/overview.page

Bob

 

[stevrosty]

hey thanks for that! ill give it a try. regards