The X3102 is a protection and monitor IC for use in battery packs consisting of 3 series Lithium-Ion battery cells. The device provides internal over-charge, over-discharge, and overcurrent protection circuitry, internal EEPROM memory, an internal voltage regulator, and internal drive circuitry for external FET devices that control cell charge, discharge, and cell voltage balancing.
Over-charge, over-discharge, and overcurrent thresholds reside in an internal EEPROM memory register and are selected independently via software using a 3MHz SPI serial interface. Detection and time-out delays can also be individually varied using external capacitors.

FEATUREs
• Software Selectable Protection Levels and Variable Protect Detection/Release Times
• Integrated FET Drive Circuitry
• Cell Voltage and Current Monitoring
• 0.5% Accurate Voltage Regulator
• Integrated 4kbit EEPROM
• Flexible Power Management with 1µA Sleep Mode
• Cell Balancing Control

Benefit
• Optimize protection for chosen cells to allow maximum use of pack capacity.
• Reduce component count and cost
• Simplify implementation of gas gauge
• Accurate voltage and current measurements
• Record battery history to optimize gas gauge, track pack failures and monitor system use
• Reduce power to extend battery life
• Increase battery capacity and improve cycle life battery life