[EMAIL PROTECTED] wrote: > The way the bq2003 is used in the Tropica charger (oh I'm out on a > limb here) is as a controller for a buck converter... My problem is > that it looks to me like in this configuration, it just keeps pumping > out 12 amps until a threshold voltage and then shuts off. This doesn't > sound like a valid charging method for lead acid.
No; it is a poor algorithm. However, if it is built well enough, it could serve as the power stage for a smarter charger. A small microcontroller could implement something like a dv/dt algorithm: Full current until voltage hits 2.4v/cell, then constant voltage until current falls to 5 amps, then (if you want to equalize) constant 5 amps until voltage stops rising or reaches 2.5v/cell. -- Lee A. Hart Ring the bells that still can ring 814 8th Ave. N. Forget your perfect offering Sartell, MN 56377 USA There is a crack in everything leeahart_at_earthlink.net That's how the light gets in - Leonard Cohen
