Harold,

     I am trying to design out a Benchmarq device we are currently using,
     yes we have a microcontroller on board and so I am going to get it to
     do the work.


______________________________ Reply Separator _________________________________
Subject: Re: Battery Charging Techniques
Author:  pic microcontroller discussion list <PICLIST@MITVMA.MIT.EDU> at
INTERNET
Date:    06/08/97 12:11


        There are, of course, chips just for this purpose.  I think they
generally watch for either a zero or negative dV/dt, depending on battery
chemistry.  They will also often watch battery temperature, since there
is a rapid rise in cell temperature on continued charging after the
battery reaches full charge.  Each of these techniques assume a constant
current charge.
        Comapnies that come to mind are Maxim and maybe Linear
Technology.  You could, in the interest of reducing chip count, do
soemething similar with a PIC.


Harold