
Maxim Integrated
DESCRIPTION
The DS2761 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 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: 15.625μV 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
■ 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