DS2762 High Precision, Li+ Battery Monitor Description and Pin Configuration Diagram

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Overview:

The DS2762 high-precision Li+ battery monitor is a device that combines data acquisition, information storage and security protection for cost-sensitive battery pack applications. This low-power device integrates accurate temperature, voltage, and current measurements, non-volatile (NV) data storage, and Li+ battery protection circuitry in a small TSSOP package or flip-chip package. The DS2762 is the best solution for applications such as residual capacity estimation, safety monitoring and battery characterization data storage.

Key features:

• Li+ battery safety circuit
  • Overvoltage protection
  • Overcurrent/short circuit protection
  • Undervoltage protection
• When the accumulated current or temperature exceeds the threshold set by the user, a warning signal is sent to the host.
• 0V battery recovery charging
• There are two versions:
  • Built-in 25mΩ current-sense resistor
  • External user selectable current-sense resistor
• Current measurement
  • 12-bit bidirectional measurement
  • Internal current-sense resistor: 0.625mA LSB and ±1.9A dynamic range
  • External current-sense resistor: 15.625μV LSB and ±64mV dynamic range
• Current accumulation:
  • Internal current-sense resistor: 0.25mAhr LSB
  • External current-sense resistor: 6.25μVhr LSB
• Voltage measurement resolution 4.88mV
• Temperature measurement with integrated sensor, resolution 0.125 ° C
• Support system power management and control functions
• 32-byte lockable EEPROM
• 16-byte general purpose SRAM
• Dallas 1-Wire® interface with unique 64-bit device address
• Low power consumption:
  • Working current: typical 60μA, maximum 90μA
  • Sleep current: typical 1μA, maximum 2μA

Application / Use:

• Cellular phone/smart phone
• Digital camera
• PDA