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High Current, High Side Driver Help Needed

Discussion in 'General Electronics Discussion' started by Roddy Wayne, Apr 28, 2015.

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  1. Roddy Wayne

    Roddy Wayne

    2
    0
    Apr 28, 2015
    Hello Group,

    This is my first post to this group.
    My problem is, I have Eight 12 Volt Lamps that I want to control with a PIC. These lamps have their screw shells already grounded so, I need to control the Positive 12 Volts going to the lamps. Each lamps current is about 2.2 Amps but, the inrush current could be several times as much. I am looking for any recommended Transistor Drivers / Circuits that could be used in this application.

    Thanks for any help!
    Rod
     
  2. ADRT

    ADRT

    192
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    Nov 25, 2014
    I use IRF540's for a lot of my high power projects. They are relatively easy to find and can handle some pretty high currents and voltages, but are easily triggered with an output from my Arduino without putting undo strain on the output. Can easily be used in conjunction with an opto isolator if concerns of damaging controller output.
     
  3. ADRT

    ADRT

    192
    32
    Nov 25, 2014
    Sorry that's wrong. I wasn't taking into account that you where switching on high side of the LED.You would need a PNP MOSFET instead. This one should work fine for what you are doing and is reasonably priced.

    https://www.sparkfun.com/products/10349
     
  4. Roddy Wayne

    Roddy Wayne

    2
    0
    Apr 28, 2015
    Thank you very much! I've downloaded the pdf and will try them soon.
     
  5. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,411
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    Jan 21, 2010
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