DESCRIPTION

The DS2761 high-precision Li+ battery monitor is a data-acquisition, information-storage, and safetyprotection device tailored for cost-sensitive battery pack applications. This low-power device integrates precise temperature, voltage, and current measurement, nonvolatile (NV) data storage, and Li+ protection into the small footprint of either a TSSOP package or flip-chip package. The DS2761 is a key component in applications including remaining capacity estimation, safety monitoring, and battery-specific data storage.

FEATURES

■ Lithium-Ion (Li+) Safety Circuit

- Overvoltage Protection

- Overcurrent/Short-Circuit Protection

- Undervoltage Protection

■ Zero Volt Battery Recovery Charge

■ Available in Two Configurations:

- Internal 25mΩ Sense Resistor

- External User-Selectable Sense Resistor

■ Current Measurement

- 12-Bit Bidirectional Measurement

- Internal Sense Resistor Configuration: 0.625mA LSB and ±1.9A Dynamic Range

- External Sense Resistor Configuration: 15.625uV LSB and ±64mV Dynamic Range

■ Current Accumulation:

- Internal Sense Resistor: 0.25mAhr LSB

- External Sense Resistor: 6.25μVhr LSB

■ Voltage Measurement with 4.88mV Resolution

■ Temperature Measurement Using Integrated Sensor with 0.125°C Resolution

■ System Power Management and Control Feature Support

■ 32 Bytes of Lockable EEPROM

■ 16 Bytes of General-Purpose SRAM

■ Dallas 1-Wire? Interface with Unique 64-bit Device Address

■ Low Power Consumption:

- Active Current: 60μA typ, 90μA max

- Sleep Current: 1μA typ, 2μA max