I've got a MAX712 charging 3X 3000 milliamp hour NiMH AA 3/4 batteries in series. The batteries power my 40X1/GSM combo.
Im a little confused on the charge rate that I should be using/seeing going into them.
Im charging them at C4 rate. My power supply shows that there is 300 odd milliamps being drawn on fast charge, this drops back to 80 on trickle.
This probabaly sounds dumb but I though that I should see at C4 a quarter of 9000 milliamps per hour ie. 2500 being drawn.
But I now think this is incorrect because I look on pg. 14 of the data sheet
http://datasheets.maxim-ic.com/en/ds/MAX712-MAX713.pdf
and it has a working example of 3X1000 mAh batteries being charged at a 1A rate being charged in 1 hour. I had thought at that rate they'd take 3. hours?
Im a little confused on the charge rate that I should be using/seeing going into them.
Im charging them at C4 rate. My power supply shows that there is 300 odd milliamps being drawn on fast charge, this drops back to 80 on trickle.
This probabaly sounds dumb but I though that I should see at C4 a quarter of 9000 milliamps per hour ie. 2500 being drawn.
But I now think this is incorrect because I look on pg. 14 of the data sheet
http://datasheets.maxim-ic.com/en/ds/MAX712-MAX713.pdf
and it has a working example of 3X1000 mAh batteries being charged at a 1A rate being charged in 1 hour. I had thought at that rate they'd take 3. hours?