Re: Lead-Acid battery charger with UC-2906

Ken Smith wrote:

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

Thank you for your prompt response :-)
Well... I'm using that design!!
I've added also a capacitor between PIN8 and GND to avoid the entering in
float mode charge only for noise (as is wrote in the "Application Note")

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.

Uhmmm... I've readed that the best way to charge the battery is "Dual level
floatcharge, http://www.uuhome.de/william.darden/ . . so I have choosen the
project of figure 1. . .
The protection against self-discharge and inverted battery polarity is
important...I can modify the scheme with adding a diode, and recalculating
The value of Voc, Vf, etc?

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?

....!!
I want to made an automatic battery charger, for many type of lead acid,
motorbikes battery.
I need a current of ,08 - 1 A max, and I must charge traditional, Pb-gel and
other type of batteries, depending of bike manifacturer.
Do you know another way to made one?
I'm not very expert :-) , so I'm searching a simple way to made a
charger..and I thinked (before your response!!) that the UC2906 was the
better solutions, only changing the value of the 4 R with a multiway switch,
to adapt the various tension level according with the tecnology of the
battery. . .
Do you think is this correct, or not?
Any other solutions?
Thank you! :-)


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