AVR-Chat

Eugene,

Just a few comments on the FETs

You list the IRFZ46, which is rated only for 10V drive.  If you look at Fig
1 in it's data sheet, driven by 4.5V, it's performance is much less than you
might be expecting.  A FET designed to be driven by 5V will give you better
performance for a smaller (easier to drive) device.

A separate driver for the gates can drive the FET gates better (more
quickly), isolate the ATMEGA16 from coupling back through the FET and when
the inevitable accident happens that destroys the driver - the driver is
hopefully cheaper than the uC to replace.  Even as a hobby, it's more fun to
experiment with something that isn't tempermental?

Jon





2010/12/3 evgenii sorokin <escorrespondence@mail.ru>

> Hello Andy,
>
>  Sure. I'll post it all after prototype board and source code building up.
> I do not pretend to make them as good as commercial ones. This is just a
> hobby machine.
>
> Best regards,
> Eugene
>
>
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