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Help understanding N-Channel MOSFET body diode

Discussion in 'Electronic Basics' started by [email protected], May 17, 2007.

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    Is there a rule of thumb stating how much power an N-Channel MOSFET's
    internal body diode (anode at source cathod at drain) can handle vs.
    the normal use drain to source power rating of the device?

    Does this make sense?

    I am using an Nch MOSFET to switch a load to ground in a battery
    operated project. The design does not allow me to place a rectifier
    diode in series with the load to prevent current flow through the body
    diode in the event of reverse battery connection. I was wondering if
    the battery was connected in reverse, would the load limit current
    enough to save the device? Unfortunately I never see the power rating
    (or forward voltage drop of this diode) published in manufactures data
    sheets so i have no way to tell.

    Thank you in advance,

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