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MAX712 - NiCd/NiMH Battery Fast-Charge Controllers

General Description

The MAX712/MAX713 fast-charge Nickel Metal Hydride (NiMH) and Nickel Cadmium (NiCd) batteries from a DC source at least 1.5V higher than the maximum battery voltage.

1 to 16 series cells can be charged at rates up to 4C.

Key Features

  • o Fast-Charge NiMH or NiCd Batteries o Voltage Slope, Temperature, and Timer Fast-Charge Cutoff o Charge 1 to 16 Series Cells o Supply Battery’s Load While Charging (Linear Mode) o Fast Charge from C/4 to 4C Rate o C/16 Trickle-Charge Rate o Automatically Switch from Fast to Trickle Charge o Linear Mode Power Control o 5µA (max) Drain on Battery when Not Charging o 5V Shunt Regulator Powers External Logic Ordering Information PART TEMP RANGE PIN-.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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EVALUATION KIT AVAILABLE MAX712/MAX713 NiCd/NiMH Battery Fast-Charge Controllers General Description The MAX712/MAX713 fast-charge Nickel Metal Hydride (NiMH) and Nickel Cadmium (NiCd) batteries from a DC source at least 1.5V higher than the maximum battery voltage. 1 to 16 series cells can be charged at rates up to 4C. A voltage-slope detecting analog-to-digital converter, timer, and temperature window comparator determine charge completion. The MAX712/MAX713 are powered by the DC source via an on-board +5V shunt regulator. They draw a maximum of 5µA from the battery when not charging. A low-side current-sense resistor allows the battery charge current to be regulated while still supplying power to the battery’s load.