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Gundersen
Joined: 21 Mar 2002
Posts: 12
Location: EU
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 21 Nov 2004 11:06 Need some help on designing af 7.2V Li-Ion charger |
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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(at)700mA
Battery 7.2V(at)1100mAh Li-Ion
Regards.
Gundersen
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gevy
Joined: 17 Nov 2004
Posts: 377
Helped: 41
Location: Russia
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| 06 Dec 2004 13:01 Re: Need some help on designing af 7.2V Li-Ion charger |
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I attach a useful paper
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moda
Joined: 05 Dec 2004
Posts: 67
Helped: 4
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| 06 Dec 2004 13:12 Re: Need some help on designing af 7.2V Li-Ion charger |
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Well- TI have it for you- BQ24010
http://focus.ti.com/lit/ug/sluu125a/sluu125a.pdf
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asit
Joined: 22 Mar 2002
Posts: 94
Helped: 3
Location: India
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| 06 Dec 2004 13:32 Need some help on designing af 7.2V Li-Ion charger |
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| Atmel site has an application note on smart battery charger usin AVR.
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yaxazaa
Joined: 13 Nov 2004
Posts: 115
Helped: 3
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| 07 Dec 2004 8:02 Re: Need some help on designing af 7.2V Li-Ion charger |
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| 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.
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