Switching charger for SLA battery

[harrychoo]

Hi all.

I'm plan to design a switching charger for a Sealed Lead Acid Battery with ratings 12V and 7Ah.

I plan to use current mode controller either UC3844A from Unitrode or HA17384 from Hitachi.

Can i know where can i find the schematic for this? And i also not sure how to control the charging voltage and current by using switching mode..

Or any other idea to design switching charger out of that 2 switching regulators?

Need more info on this.

Thanks

 

[Spagbol]

Unitrode produce a switch mode IC specifically for Lead acid charging, the bq2031. If you still want to use one of those PWM ICs you mention you could always have a look at the application note for the bq2031 to see how it works: http://focus.ti.com/lit/an/slua017/slua017.pdf