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MOSFET acting weird, any ideas?

by thsuper1@[EMAIL PROTECTED] Jul 22, 2008 at 10:19 AM

Hi all!
Not a newbie, here, I went to electronics school about a decade ago,
and although I've reeducated myself to this point, I seem to be stuck.
Please help, anybody!

I've got a mosfet that I'm using, driving an irf510 with a tc4420 cmos
driver ic.
I've got the driver being fed a square-wave with a 555.
The Driver is putting out a clean 12volt p-p SW all the way to the
gate leg on the mosfet.
I'm trying to source battery voltage, 12.75v at way more potential
amps than what my circuit is "supposed" to be drawing. around
6-8amps.
The mosfet is only sourcing 2v p-p, and the same square-wave, good and
clean, just not big enough!

I've tried various pull-up resistor arrangements, I've tried using a
transistor instead of the driver ic, and the driver ic works the best.
but nothing over 2v p-p. I'm stumped. I need approximately 12v, I
should be pulling directly form V++,

B
 




 8 Posts in Topic:
MOSFET acting weird, any ideas?
thsuper1@[EMAIL PROTECTED  2008-07-22 10:19:39 
Re: MOSFET acting weird, any ideas?
Tim Wescott <tim@[EMAI  2008-07-22 12:33:37 
Re: MOSFET acting weird, any ideas?
thsuper1 <thsuper1@[EM  2008-07-22 13:46:07 
Re: MOSFET acting weird, any ideas?
Tim Wescott <tim@[EMAI  2008-07-22 14:25:33 
Re: MOSFET acting weird, any ideas?
thsuper1 <thsuper1@[EM  2008-07-22 15:20:25 
Re: MOSFET acting weird, any ideas?
Tim Wescott <tim@[EMAI  2008-07-22 16:02:38 
Re: MOSFET acting weird, any ideas?
"Paul E. Schoen"  2008-07-23 00:19:40 
Re: MOSFET acting weird, any ideas?
Jamie <jamie_ka1lpa_no  2008-07-23 19:56:19 

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