Nch mosfet direct driven with pic


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    Join Date
    Feb 2012
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    PERTH AUSTRALIA
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    Default Nch mosfet direct driven with pic

    hI GUYS , looking for a bit of input on using these Nch Mosfet ( DMN3404L) and this Pch Mosfet( NX2301P) - see spec sheet attached

    and if the use of resistors in series, pic to the gate and or resistor pullup ( nch ) / pull down (Pch ) on gate is required

    The N ch has 500pf capacitance with a gate voltage threshold of 1.4 - 2v max , very low on Ohms

    the current PCB design is such that the Mosfet is close the LED or other device it switches ,
    with the CPU a max of 1200mm away and the tracks feeding the MOSFET are thick as possible ( board Layout to be reviewed )

    the Nch mosfets used to drive IR leds at about 100ma pulsed 38Khz one at a time

    regards

    Sheldon
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