MAX1665S/V/X
19-1605; Rev 0; 1/00
Lithium-Ion Battery Pack Protector
General Description
The MAX1665 provides protect...
MAX1665S/V/X
19-1605; Rev 0; 1/00
Lithium-Ion Battery Pack Protector
General Description
The MAX1665 provides protection against over
voltage, under
voltage, 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 (over
voltage 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 (under
voltage limit). If the
voltage across any cell falls below +2.5V, the MAX1665 turns off the discharge
MOSFET. This safety feature prevents overdischarge of any cell within the battery pack.
Charging and discharging are allowed if t...