alternative to a buk 453

Discussion in 'The Projects Forum' started by markosillypig, Oct 27, 2009.

  1. markosillypig

    Thread Starter Active Member

    Jul 21, 2008
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    hi all is there an alternative to a buk 453 i know it is rated at 100A but i only want to use it for 1 to 2A

    scamat included
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
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    What sort of voltage must it handle, and how fast will it switch?
     
  3. markosillypig

    Thread Starter Active Member

    Jul 21, 2008
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    12 volt fast switch about 1000hz
     
  4. SgtWookie

    Expert

    Jul 17, 2007
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    The BUK 453 is not rated for 100A; it is rated for 100V Vds.
    An IRF530 would be an equivalent replacement.
    If you are only going to be using it for a 1A current sink, use an IRF510.

    However, you must use a 10V supply, not an 8V supply as shown. (8v wasn't correct for the BUK 453, either.) If you want to use an 8v supply, use an IRL510, which is a logic-level power MOSFET.
     
  5. markosillypig

    Thread Starter Active Member

    Jul 21, 2008
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    i stand corrected i will be using a 12v supply for the circuit
     
  6. SgtWookie

    Expert

    Jul 17, 2007
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    12V will work just fine.
     
  7. markosillypig

    Thread Starter Active Member

    Jul 21, 2008
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    would the IRF530 be an N channel ??
     
  8. SgtWookie

    Expert

    Jul 17, 2007
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    Have you found the datasheet for it yet?

    If not, go look up the datasheet using a datasheet search site.

    You'll see a symbol for a MOSFET near the top of the datasheet.

    Then look at the symbols in this Wikipedia entry: http://en.wikipedia.org/wiki/MOSFET

    This exercise will help you to figure it out for yourself, rather than having to ask.
     
  9. Wendy

    Moderator

    Mar 24, 2008
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    You can also get a digital style MOSFETs, that uses smaller voltages on the gate. I don't have any part numbers to recommend, but I went with my local source (Tanner's) and asked.
     
  10. markosillypig

    Thread Starter Active Member

    Jul 21, 2008
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    hi could any one tell me what the value is of r6 would be ??
    i know this is a crap scamatic but i have been told it works fine
     
  11. SgtWookie

    Expert

    Jul 17, 2007
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    R6 is 0R, which means zero Ohms. It is basically a jumper.
     
  12. markosillypig

    Thread Starter Active Member

    Jul 21, 2008
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    just another quick one
    i have made the circuit board today and now when it comes to assembling it i can not figure out what L1 is on the scamatic and where does J15 connect to
    picture included

    could anyone help please
     
    Last edited: Nov 2, 2009
  13. beenthere

    Retired Moderator

    Apr 20, 2004
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    L1 is a 22 microhenry hash filter. It tries to keep high frequency noise out of the Vcc feed to the microcontroller. Double check the proper pin for the Vcc voltage input.
     
  14. markosillypig

    Thread Starter Active Member

    Jul 21, 2008
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    Last edited: Nov 2, 2009
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