High-Precision Li+ Battery Monitor with 2-Wire Interface

The DS2764 high-precision Li+ battery monitor is a data-acquisition, information-storage, and safety-protection 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 DS2764 is a key component in applications requiring remaining capacity estimation, safety monitoring, and battery-specific data storage.

Applications

* Cell Phones/Smartphones * Digital Cameras * PDAs

* Li+ Safety Circuit

* Overvoltage Protection * Overcurrent/Short-Circuit Protection * Undervoltage Protection

* 0V 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: 15.625µV 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

* 40 Bytes of Lockable EEPROM

* Option for Unique 64-bit ID

* Industry 2-Wire Interface with Programmable Slave Address

* Low-Power Consumption:

* Active Current: 60µA typ, 90µA max * Sleep Current: 1µA typ, 2µA max