Yea i forgot the schematic shows it as 1.5V when in fact its 12vdc. The
MOSFET is a P channel type.
At 09:04 PM 8/3/2001 +1000, you wrote:
>Tim Thompson wrote:
> >
> > Hello all, once again,
> >
> > I'm attempting to make a PSU based off the attached schematic. The problem
> > I'm having is the MOSFET wont turn off.
> > Its allways 'on'. As soon as +12 is applied the circuit comes alive,
> > regardless of the state of its Gate. Pull it high or low and its still on.
> > The MOSFET I'm using is a MTP2P50E, its made by Motorolla and its datasheet
> > can be found on www.onsemi.com, just search for that PN.
> >
> > Anyway if anyone has any suggjestions, lemmy know.
>
>
>Hi Tim, your circuit misses the important bit.
>The bit that drives the FET. :o) Your circuit
>also says 1.5v where I think you mean 12v?
>And is your FET an N type or P type device?
>-Roman
>
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