help choosing a mosfet

Discussion in 'General Electronics Chat' started by c.marsh, Jun 10, 2013.

  1. c.marsh

    Thread Starter Active Member

    May 16, 2009
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    need help picking a mosfet for 12v circuit that can handle 2amps and trigger off less than 5v.

    also, if leds are hooked up to it and triggered from a micro controller, the leds are told to fade, will the mosfet interfere with that? or wil they work no problems?
     
  2. crutschow

    Expert

    Mar 14, 2008
    13,000
    3,229
    What are you controlling to cause the LEDs to fade?
     
  3. c.marsh

    Thread Starter Active Member

    May 16, 2009
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    0
    its a lighting kit,

    the micro controller, an attiny23** chip tells the led to fade up (fading on)

    the mosfet cannot interfear with this process though which is why i need help picing out the right one, also i cant find one for the stated ratings or close to
     
  4. c.marsh

    Thread Starter Active Member

    May 16, 2009
    100
    0
    any ideas?
     
  5. absf

    Senior Member

    Dec 29, 2010
    1,492
    372
    What about IRLZ44N ? It can stand 60V and 36A of current...

    Allen
     
  6. c.marsh

    Thread Starter Active Member

    May 16, 2009
    100
    0
    will that interfere with fading leds?

    like prevent them from being able to fade?
     
  7. c.marsh

    Thread Starter Active Member

    May 16, 2009
    100
    0
    also, got any others which are easier to source in the uk without costing so much?
     
  8. elec_mech

    Senior Member

    Nov 12, 2008
    1,513
    193
    Take a look at Bill's blog, specifically MOSFETs and Driving MOSFETs. Depends on the frequency you'll be driving them, but you can add driver in the worse case.

    I'm not very familar with stores in the UK, but I'm aware of Farnell and Maplin. Maplin doesn't appear to have a parameter search function, but Farnell does. Go here and select the desired ratings - be sure to select larger ratings as well when appropriate to give you a larger selection to choose from, e.g., Vds 12V or higher, 2A or more, etc.

    Being in the U.S., I like Digikey or Mouser, but shipping from here to the UK wouldn't be financially practical. You can also look at futurelec.com - ships from Asia, but shipping rates aren't bad and prices for parts are usually pretty inexpensive.
     
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