NiMH battery charger

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I need an integrated battery charger for a NiMH battery pack of 4 series cells. They are high capacity cells, over 10,000 mAH. Input voltage is 7-36 volts. 28 volt nominal. I would like to charge them at around 3 amps. I had looked at the Linear Tech LTC4011, but it only will shut off when doing a fast charge, which in this case would be 10 - 12 amps. I do not have a battery temperature available so I can not do the fast charge. Anyone know of any parts out there?

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Sensing the temperature seems to be the preferred way to detect the charge, but you could do peak detection, as the V will drop a little as the battery is fully charged.

Next, you'll need a 3A current source.

If you don't know my whole story, keep your mouth shut.

If you know my whole story, you're an accomplice. Keep your mouth shut. 

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MAX712/713 is another (classic) part. Or the LTC4060.

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Odd that everything I figure out how to do, you guys know of a chip for :D

If you don't know my whole story, keep your mouth shut.

If you know my whole story, you're an accomplice. Keep your mouth shut. 

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OHHH this has come up again...we must have not been giving the op what he wanted in the other thread.

oops sorry I thought it was the same person https://www.avrfreaks.net/index.p...

John Samperi

Ampertronics Pty. Ltd.

https://www.ampertronics.com.au

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