Charge circuit IC's for Handhelds

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#1
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Hello everyone,

I have been searching for a nice rechargeable battery and charging circuit for the FR. I have found that this is no simple task for a novice.

Sparkfun has some great stuff and Maxim's site will drowned you in options but, most seem to drive the parts count so high as to make the charging circuit more complex than the device itself!!

Anyone know of a "simple" (read - low parts count) IC that will charge a NiMH??

Thanks
John

Just some guy

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Linear Technology is always a good bet for such stuff. E.g. LTC4060. Or just snoop around Linear's website.

Stealing Proteus doesn't make you an engineer.

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LTC4060 works well, but it comes in a thermally enhanced TSSOP16 or DFN packages.

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Thanks guys, I did see that one in my search and it looked promising. Sparkfun also has a breakout board for the Max1555 That is pretty groovy. I will look closer at the LTC4060!

Thanks
John

Just some guy

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TI has some good charger ICs. The best (MHO) are the switch-mode supply types and those will drive up your parts count and cost, certainly. But, the heat generated will be markedly lower.

Jim

Jim Wagner Oregon Research Electronics, Consulting Div. Tangent, OR, USA http://www.orelectronics.net

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The choice between a linear or a switching one also depends if you want to fast or slow charge the batteries, the size of casing, input voltage range and the size of the batteries.

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I went with the LTC4060 and a max8815. I am using two NiMH AA batteries from Sparkfun. This is a pretty steep slope for me...I will keep you guys updated!!

Thanks
John

Just some guy