[TriEmbed] Power FETs Vol 25, Issue 27

[Shane Trent]

Brian,

I have often seen 100 ohm resistors shown for the gate. You might try
something in that range. Again, I am a little surprised the 33k didn't work
slowly. Is there a chance that there is a pull-down resistor already on the
gate? Did you try tying the 33k resistor directly to the 3.3v rail?

Shane

On Thu, Jun 18, 2015 at 2:50 PM, Grawburg <grawburg at myglnc.com> wrote:

> Shane,
>
> I already have a 3.3 ohm resistor between the gate and IO pin. The larger
> 33K stopped it from working. Maybe I need to test this again.
> I must see if I have a 100K or more for the G-S connection.
>
>
> Thanks,
> Brian
>
> ------------------------------
> -----Original Message-----
> From: "Shane Trent" <shanedtrent at gmail.com>
> Date: 06/18/15 01:51 PM
> Subject: Re: Re[2]: [TriEmbed] Power FETs Vol 25, Issue 27
>
> Brian,
>
> 1) I expect the length of wire to the gate would NOT be a limiting factor
> in your application. It might slow down the switching a little but it
> sounds like it would not be an issue. I would use a resistor (100 ohm or
> so) between the I/O pin and gate and add a large pull down resistor,
> 100k-1M ohm, between the gate and source to ensure capacitive coupling
> cannot start turning on the FET.
>
>


-- 
A blog about some of my projects.  http://fettricks.blogspot.com/
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