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Thread: IGBT gate driver

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  1. 05-06-2009, 09:36 PM #1
    libbresse is offline Registered
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    Jun 2007
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    IGBT gate driver

    I have problem understanding how the gatedriver below works :drowning:

    Do I set ref to the voltage I want to retain on the output ?

    Input is only for turn on the gatedriver ?

    http://www.fairchildsemi.com/ds/FA%2FFAN3111C.pdf
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  2. 05-06-2009, 10:36 PM #2
    langwadt is offline Registered
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    ref is for setting the logic levels for the input, i.e. if you intend to drive 'in' from a 3.3 volt mcu you would connect ref to 3.3V. Anything over ~50% of vref will be seen as high, anything below ~30% of vref as low

    Vdd drives the output

    -L
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  3. 05-07-2009, 03:14 PM #3
    libbresse is offline Registered
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    langwadt: Ok I have get it totally wrong thank you for the input,

    how do I know what the fan3111 sends out then when the output is set to high ? :idea:
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