sla charging schematics ?

mark krawczuk · 2010-06-09T03:44:58+00:00

hi, after some schematics to charge 6 volt and 12 volt sla ( sealed lead acid ) batteries.... basically dont need to charge them flat out , cause they dont get used much, something i can leave on trickle charge for a week or so , would be good....any body have any or know of any links ?

Jun 09, 2010 25 Replies

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John Tserkezis 16 years ago

Thank you. That was what I *meant* to say.

Clearly, diplomacy is not my strong point. :-)

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John Tserkezis 16 years ago

For that kind of pin count, I'd rather go for a switcher like an LM2576 or similar. You can have adjustable Vout max AND Imax, more current capability than the L200, AND lower heatsink requirements to boot.

It would cost more, but the transformer/power supply would weigh with a significant part of that anyway.

Would still cost more than a commercially built one of course, but you'd learn a great deal.

On second thoughts, if you're currently dealing with the basics, this might be a bit steep to design from scratch... :-)

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mark krawczuk 16 years ago

well, what are you on here for ????

anyways , if you want to know, i have 2 sla batteries, a 6 volt and a 12 volt.. and IF YOU READ my earlier post , i was looking sorta, for a specific schematic for charging them .

did i ask you to design one ? NO

did i ask you to build me one ? NO

did i ask you for the parts ? NO

SO TELL ME L, , WHAT HOME WORK WAS IT THAT YOU WHERE GOING TO DO FOR ME ?

did you help your kids with their homework ? if you didnt , well, what can i say.... ???

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who where 16 years ago

First do a google search for slua115.pdf, which is an app-note for the Unitrode/TI SLA charger chip. Apart from giving you some of the best care and feeding info, it shows a schematic for a dead-simple SLA charger (Fig4, p 4/12). The kit which Altronics/Jaycar(?) produced several years back was a very close copy of that schematic.

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