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Difference between mosfet with and without logic level in inverter???

Discussion in 'Electronic Components' started by SAUHING LEE, Dec 13, 2007.

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  1. SAUHING LEE

    SAUHING LEE Guest

    I am looking for a replacement for AOD444, a n-channel mosfet in an
    inverter
    http://www.aosmd.com/web/products/product_display.jsp?displayType=mos...

    www.aosmd.com/pdfs/datasheet/AOD444.pdf

    AOD 444 , vds :60v, vgs:20v, id: 12A

    I checked digikey.com, but only 2 similar one are available. They are
    IPD640N06L G
    http://www.infineon.com/dgdl/IPD640N06L+G+Rev1.2.pdf?folderId=db3a304...

    and

    MTD3055VL
    http://www.fairchildsemi.com/ds/MT/MTD3055VL.pdf

    They both look similar to AOD 444, but they are logic level.

    QUUESTION 1
    Will it work if i substitute a mosfet (without logic level ) with
    another mosfet that has logic level?

    Also, i found another similar one ,std12nf06l
    http://dkc1.digikey.com/Redirect.aspx?url=http://www.st.com/stonline/...

    The Continuous drain current ID at 25 degree C is the same as aod444.
    BUT it is smaller than AOD444 at 100 C.

    QUUESTION 2
    When replacing mosfet, do we have to consider the ID at TC=100
    degree?
     
  2. Jamie

    Jamie Guest

    the MTD3055VL seems to be a better Rds(on), than the original which is
    in your favor...
    I would go with that one.

    The others, I could link to for some reason..
     
  3. SAUHING LEE

    SAUHING LEE Guest

    Will the inverter work if the original one had not logic level, and
    MTD3055VL has logic level?
     
  4. Jamie

    Jamie Guest

    via the spec's you gave, the original one is a logic level.. It just
    does not state that.
    logic level normally means the on state voltage required, which is a
    low level.

    Since both the original and your selected are very close, your the
    selection is fine, also since this used in a inverter. It's a perfect
    fit.


    --
    "I'd rather have a bottle in front of me than a frontal lobotomy"

    "Daily Thought:

    SOME PEOPLE ARE LIKE SLINKIES. NOT REALLY GOOD FOR ANYTHING BUT
    THEY BRING A SMILE TO YOUR FACE WHEN PUSHED DOWN THE STAIRS.
    http://webpages.charter.net/jamie_5"
     
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