DESCRIPTION

The DS2441 1-Cell Li-Ion Battery Manager provides all essential functions for monitoring, protecting and managing one-cell lithium-ion battery packs. The DS2441 constantly measures cell voltage, current, and temperature, and automatically takes action to disable charging and/or discharging of the cell to protect it when undesirable conditions arise.

FEATURES

■ Provides all identification, information, instrumentation and protection functions needed in a lithium-ion battery pack

■ Supports one-cell battery packs

■ Protects cell from:

– overvoltage (overcharge)

– undervoltage (overdischarge)

– overcurrent (charging and discharging)

– high temperatures (thermal runaway)

■ Current accumulator tracks remaining battery capacity in 0.5 increments

■ Voltage measurement with 10 mV accuracy

■ Temperature measurement with ±2°C accuracy eliminates need for thermistor

■ 32-byte user memory stores battery data

■ 64-bit ROM ID uniquely identifies each battery pack

■ 1-Wire™ interface carries all commands and data via a single wire

■ Programmable alarm warns when cell is nearly discharged

■ Programmable I/O pin supports LEDs, vibration motors and other features

■ Operating temperature range: -40°C to +85°C

■ 10kV ESD rating