Need some help on designing af 7.2V Li-Ion charger

[Gundersen]

7.2v li-ion charger

Need som help on the subject. - I new to designing battery applications, so pointers for principles and circuit examples would be nice. Links and so on.

I'm building a portable device, and have an Atmel controller present, which I consider using for charge controller, by letting it control a FET, for pulse charging and then measuring current with a series resistor. Is this to simple, or should other things be taken into consideration.

DC-charge supply 9V@700mA

Battery 7.2V@1100mAh Li-Ion

Regards.
Gundersen

 

[gevy]

I attach a useful paper

 

[moda]

Well- TI have it for you- BQ24010

https://focus.ti.com/lit/ug/sluu125a/sluu125a.pdf

 

[asit]

Atmel site has an application note on smart battery charger usin AVR.

 

[yaxazaa]

Is it a board level design or CHIP level design. If chip level, I think it would be more complicated than this. Besides the sense nlock, you need regulator, comparator, etc.