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MAX1665S - Lithium-Ion Battery Pack Protector

General Description

The MAX1665 provides protection against overvoltage, undervoltage, overcharge current, and overdischarge current for 2-cell to 4-cell lithium-ion (Li+) battery packs.

Very low operating current ensures that cells are not overdischarged during long storage periods.

Key Features

  • o Complete Protection Against: Cell Overvoltage Cell Undervoltage o Pack Protection for Excessive Charge and Discharge o Very Low Supply Current: 16µA typ o Low Standby Current: 1µA max o Matched Cell Input Bias Current (.

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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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MAX1665S/V/X 19-1605; Rev 0; 1/00 Lithium-Ion Battery Pack Protector General Description The MAX1665 provides protection against overvoltage, undervoltage, overcharge current, and overdischarge current for 2-cell to 4-cell lithium-ion (Li+) battery packs. Very low operating current ensures that cells are not overdischarged during long storage periods. The MAX1665 controls two external N-channel MOSFETs to limit the charge and discharge voltages. Charging is allowed when the per-cell voltage is below +4.3V. When the voltage on any cell rises above +4.3V (overvoltage limit), the MAX1665 turns off the charge MOSFET. This safety feature prevents overcharge of any cell within the battery pack. Discharge is allowed when the per-cell voltage is above +2.5V (undervoltage limit).