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Dual Cell Lipo Charging IC

Hey guys,

Can anyone suggest an IC that could be used to charge dual cell Lipo batteries (7.4V) with cell balancing? Ideally the IC would be powerful enough that it could charge even if the system is under a light load. I am looking for something similar to
the MAX 1555 IC (http://www.sparkfun.com/products/674) but for multiple cells. My google search has been fruitless - I must be using the wrong keywords. Thanks for any help!

PS I am not looking for a full charging system! I already have one. Instead I am trying to build one and was wondering if any IC other than a micro-controller exists to charge Lipos safely. Also don't suggesting trickle charging as it doesn't work with Lipos.

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Board is in progress, I had to make my own DFN10 package, not as big as a pain in the ass as I thought it would be.

oops, double post...

i would seriously recommend against dual charging any lithium-ion based cells.
the likelyhood of a disastrous failure increases quite allot when you do.

and keep in mind, these things can explode if you charge them wrong.

 

Just wanted to get a list of what you guys got as your samples. I know last night a few of us did the free sample rounds and I was curious as to what you guys got a hold of. I was going to do some sample ordering myself today and wanted to not only get some of the same stuff you guys got (so I could replicate your experiments on my end) but also some chips you guys didn't get so we can all try different things and then compare results.

That's it --What did you get? and where did you get it from?

2 MCP73213.

I got some MCP73213's and some PIC18F6722, which is a 64 pin beast, its a good step up from a 40 pin PIC but less intimidating than a 80 pin pic.

Thanks for the great replies everyone! This is why LMR is so great. Last night I had an issue, tonight I have feedback from 5 talented people to solve it!

I think the MCP73213 is the chip to use, its dead simple to use:

Cheap, 10 pins too.

Krumlink once again you have proven yourself to be the IC guru! This is exactly the type of chip I was looking for. It's even simpler than I expected it to be! Thank you very much!