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DC-DC converter

Discussion in 'Electronic Basics' started by Trimbitas Sorin, Aug 12, 2003.

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  1. 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
     
  2. cirip

    cirip Guest

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

    Cirip


    without any specialised IC?? Vin = 1.2V-2.4V, Vout=>7V
     
  3. 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
     
  4. 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
    --
    | 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
    |
    |
    |
    | | > 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
    | > --
    | >
    | >
    |
    |
     
  5. David Wood

    David Wood Guest

    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.
     
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