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[DPRG] (no subject)
Subject: [DPRG] (no subject)
From: Zac Wheeler
zac at poor-robot.com
Date: Thu Mar 29 13:58:58 CDT 2007
> This circuit though, is to protect the load against having the battery
> inserted backwards. If I had several batteries and MOSFETS paralleled as
> in this circuit, the MOSFETs would happily conduct in the reverse
> direction (which is really the forward direction), draining my other
> batteries into the weaker one.
>
Hence my qualifier that it may take a little tweaking to work for you :)
I'd have to look at it a little more, but I think you could set them up
to cascade into each other. That is, you could protect one battery from
one other battery by adding a comparator/discrete circuitry to control
the turn-on of the P-FET. You could then do the same to protect one pair
of batteries from another. The wiring complexity and circuit complexity
increases a bit.
I don't know what your options are as far as cost/complexity vs. voltage
loss, but I'll bet those Schottky diodes are starting to look pretty
attractive :)
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