On 10/8/05, Anon <gandro_digest@yahoo.com> wrote:
> I have an application where I need to rely on a 3.6v lithium-ion battery
> cell for power. I am looking for an integrated 1-chip solution to simplify
> my design with the following components:
>  * a smart battery charger to charge my 3.6v lithium cell from a DC input of
> 12-volts.

  Must be really a smart one ? If your application will source less
than 70% of the lithium capacity between two charges, it could be a
simple current charger

>  * a battery monitor that will allow a microprocessor to guage battery
> charge level. As an example:
>  http://www.maxim-ic.com/quick_view2.cfm/qv_pk/4994/ln/

there are plenty on Maxim, serach deeply

>  * a DC-DC step-up converter that will step up the 3.6 volt output to 5v.

It's sure you need 5V ? Most logic chips including LCD or whatever are
using 3V or 3.3V. A simple LDO will do the job very well.

However take a look at Linear Technology site. Expensive but low noise indeed.

> additional question: can I paralell two lithium-ion battery cells for extra
> capacity off the same charge circuit?

Yes, two similar cell in voltage and current values.

cheers,
Vasile

-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist