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What basic transistor I can use for simple PWM

Discussion in 'General Electronics Discussion' started by Farukh Khan, Jul 20, 2015.

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  1. Farukh Khan

    Farukh Khan

    Jun 12, 2015

    I want to know about PWM transistors. Which simple transistor I can use for PWM. Suppose I want to control the speed of a rotor. Now I want a transistor which will check PWM signal at the base and limit current or voltage in the other two pins which will act like a limiting switch. Please suggest me a transistor like this.

    Thanks in advance....
  2. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    Jan 21, 2010
    the transistor you choose will depend on the load current. I believe there are a couple of resources which show you how to use transistors to switch a load. PWM is just switching a load repetitively and quickly
  3. Minder


    Apr 24, 2015
    PWM control especially motors is done now commonly controlled with Mosfets, these have the advantage of very low on resistance and also have the option of TTL Logic level gate compatibility.
    You can get some that have the current sense built in for external monitoring, alternatively a very low series resistor in the source lead can be used to monitor load.
    Your selection of Mosfet will depend on max load.
  4. Farukh Khan

    Farukh Khan

    Jun 12, 2015
    Thanks for the help guys :)
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