alternative to a IRFD010

Discussion in 'The Projects Forum' started by markosillypig, Nov 10, 2009.

  1. markosillypig

    Thread Starter Active Member

    Jul 21, 2008
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    hi all
    i need 3 IRFD010 for a little circuit i'm working on the only problem is that there is no stock in the uk
    can any one suggest an alternative for me
     
  2. SgtWookie

    Expert

    Jul 17, 2007
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    Use IRLD014 instead.
    http://uk.farnell.com/international-rectifier/irld014pbf/mosfet/dp/1350878

    I don't know where you came up with the IRFD010 part number.

    Very generally, MOSFETs starting with IRF are standard-level MOSFETs; needing Vgs=10 to fully turn on.
    MOSFETs starting with IRL are logic-level MOSFETs; needing Vgs=5 to fully turn on.
    This is not true in all cases, but it helps to narrow down a search quickly.
     
  3. markosillypig

    Thread Starter Active Member

    Jul 21, 2008
    184
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    here is the scamatic
     
  4. markosillypig

    Thread Starter Active Member

    Jul 21, 2008
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    the IRLD014 is us stock and not in the uk i live 10 minuets drive from farnell uk distribution center
     
  5. SgtWookie

    Expert

    Jul 17, 2007
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  6. SgtWookie

    Expert

    Jul 17, 2007
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    What is the voltage coming into the + and - connectors on the left?

    I am wary about the ZD1 and R1 usage. 5.6v is really too much for a PIC; ZD1 should be 4.7v to 5.1v.

    I would replace them both with a 78L05 regulator.
     
  7. markosillypig

    Thread Starter Active Member

    Jul 21, 2008
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    the input voltage is 4.8V and how will the
    78lO5 fit on the circuit
     
  8. SgtWookie

    Expert

    Jul 17, 2007
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    If the input is 4.8v, then you will be fine. Apparently, R1 and ZD1 are just there as a current limiter and voltage clamp to protect the uC in the case of voltage transients.

    Leave it as-is; changing to a 78L05 would only be of benefit if your supply voltage was 7v or higher. With the input being only 4.8v, the output of a 78L05 would be only 2.8v; enough to run the PIC but not enough to switch the MOSFETs on completely.
     
  9. markosillypig

    Thread Starter Active Member

    Jul 21, 2008
    184
    0
    many thanks anyway dude :)
     
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