DC-DC converter

[Trimbitas Sorin]

Hello
I need a DC-DC convertor for a LED flashlight.Do you know a good schematic without any specialised IC?? Vin = 1.2V-2.4V, Vout=>7V
Thank you

--
With best regards
Trimbitas Sorin
--
http://www.nekhbet.netfirms.com/index_ro.html
--

 

[cirip]

Would you consider using a ferrite core? If yes, I might have an idea.
What output current are you looking for?

Cirip


"Trimbitas Sorin" <lacroix-iv(NO SPAM)@go.ro> wrote in message
news:bhbgda$10a768$1@ID-192809.news.uni-berlin.de...

Hello
I need a DC-DC convertor for a LED flashlight.Do you know a good schematic
without any specialised IC?? Vin = 1.2V-2.4V, Vout=>7V
Thank you

--
With best regards
Trimbitas Sorin
--
http://www.nekhbet.netfirms.com/index_ro.html
--

 

[Trimbitas Sorin]

If there is no other solution yes.
I need the current to feed 3 blue LEDs(about 20mA each).
By the way I need that the DC-DC converter to be very small.
Thank you


--
--
With best regards
Trimbitas Sorin
--
http://www.nekhbet.netfirms.com/index_ro.html
--

 

[Trimbitas Sorin]

Da, adresa ramane valida... deci daca vrei am putea vorbi pe e-mail
Mersi mult

--
With best regards
Trimbitas Sorin
--
http://www.nekhbet.netfirms.com/index_ro.html
AND
http://www.lacroix-iv.netfirms.com/index.html
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"cirip" <cirip@NOT_VALID.com> wrote in message news:XJC_a.187955$rsJ.154266@news04.bloor.is.net.cable.rogers.com...
| Salut Sorin,
|
| Daca scot (NO SPAM) din adresa de e-mail, devine adresa valida? Daca da,
| continuam discutia pe e-mail.
|
| Pentru convertor ar fi nevoie de o oala de ferita cu diametru de vreo
| 10-12mm. Ai asa ceva? Orice traf pe miez de ferita de mici dimensiuni e bun.
| Spune-mi ce ai si mergem mai departe.
|
| Cirip
|
|
|
| "Trimbitas Sorin" <lacroix-iv(NO SPAM)@go.ro> wrote in message
| news:bhcm1l$10t5f1$1@ID-192809.news.uni-berlin.de...
| > If there is no other solution yes.
| > I need the current to feed 3 blue LEDs(about 20mA each).
| > By the way I need that the DC-DC converter to be very small.
| > Thank you
| >
| >
| > --
| > --
| > With best regards
| > Trimbitas Sorin
| > --
| > http://www.nekhbet.netfirms.com/index_ro.html
| > --
| >
| >
|
|

 

[David Wood]

National Semiconductor has a bunch of new versatile "specialized"
(magnetic boost, capacitor boost, buck boost, etc.) circuits designed
to drive leds for illumination. Check their site. I guess you could
build something yourself out of a couple dozen parts, but why.