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Favorite Catch Diode (Switching Pwr Sply)

Discussion in 'Electronic Design' started by RST Engineering \(jw\), Jun 12, 2005.

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  1. It has been a very long time since I needed anything other than good old 12
    volts from a battery for design. As a matter of fact, the last time I
    needed higher voltage I got it with a WWII surplus dynamotor for the plate
    supply of a 6146 on 6 meters ... that gives you an idea of the time frame we
    are talking about.

    However, I've recently been looking at a high power FET design and it would
    help if I could get 20 to 30 volts for the supply. The chips to do the
    switching are relatively easy to compare as are the inductors. I'm
    wondering if anybody has a favorite series of catch diodes that they like to
    use -- we're talking an amp or two.

    Preferably something that is garden variety available on the US side of the
    pond.

    Jim
     
  2. Genome

    Genome Guest

    UF4XXX 1A
    UF54XX 3A

    Or some such, could be as old as The Sun.

    GE made them.

    DNA
     
  3. Guest

    RST Engineering (jw) wrote:
    [...]
    Thru-hole: 1n5819 / 1n5822 (40v, 1A / 3A schottkys) are old
    workhorses.
    SMD: MBR340 (OnSemi 3A, 40V) & SK34 (generic, e.g. Diodes Inc.),
    both schottkys, aren't bad.

    James Arthur
     
  4. Joerg

    Joerg Guest

    Hello Jim,

    Check out the ON Semi MUR and MURS series. My favorites when it comes to
    really fast diodes for power apps.

    Regards, Joerg
     
  5. Ken Smith

    Ken Smith Guest

    The MUR1660 is nice. You get two 8 amp fastish diodes in a TO220
    package.

    The new SiC diodes are interesting but at less than about 40V they aren't
    really needed.
     
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