Re: Lead-Acid battery charger with UC-2906

In article <FI92g.92045$A83.2153528@xxxxxxxxxxxxxxxxxx>,
Starflex <starflex@xxxxxxxxxxx> wrote:
Hello!
Sorry, I'm an Italian student (I don't speak english very well, please
excuse me), and I'm creating a lead acid battery charger with the Unitrode
(Texas Instruments) UC-2906.
But there are some problems and questions. . .!!
Can anyone help me, send me a link (not the TI data***, I've already
downloaded, also the application notes) with a project of a battery charger
with this IC?

Figure 1 on the data*** shows a bad design for a charger using this
part.

Figure 4 is a little better but they still didn't isolate the battery when
the power is off. They also forgot to protect pin 2 for inverted battery
polarity.

I'd say that on the whole it would be easier to design a battery charger
without this chip than with it. Why are you using it?


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