MOSFET Driver Selection

Discussion in 'The Projects Forum' started by milon, Apr 8, 2009.

  1. milon

    Thread Starter New Member

    Mar 28, 2009
    5
    0
    Hi,

    I am building a solar peak power tracker using a buck converter and a microcontroller to control the PWM. I have the circuit sorted and most of the components selected.

    What I am having trouble with is selecting a suitable MOSFET driver. The MOSFET drain will vary between 35.4V and 44.4V @ up to 25A. The source will be connected to a 16μH inductor as shown in the diagram. The 2 low-pass filter capacitors are 16μF. This is connected to a 24V battery.

    The MOSFET I have chosen is http://docs-europe.electrocomponents.com/webdocs/0031/0900766b8003167d.pdf

    The PWM is built into the microcontroller and will be able to supply 8mA at 3.3V (http://www.rabbit.com/documentation/docs/manuals/RCM4100/RC4100UM.pdf)

    This PWM signal is what is needed to be amplified to power the mosfet.

    Would a MOSFET driver be appropriate (and what driver), or could I use an op-amp (as shown in diagram)?


    Many thanks
     
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