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DS2781
1-Cell or 2-Cell Stand-Alone Fuel Gauge IC

Complete Fuel Gauge IC for Accurate Remaining Battery Capacity Readings for 1- or 2-Cell Applications


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Description
FULL DATA SHEET (PDF, 424kB)
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The DS2781 measures voltage, temperature, and current, and estimates available capacity for rechargeable Lithium-Ion and Lithium-Ion Polymer batteries. Cell stack characteristics and application parameters used in the calculations are stored in on-chip EEPROM. The available capacity registers report a conservative estimate of the amount of charge that can be removed given the current temperature, discharge rate, stored charge and application parameters. Capacity estimation is reported in milliamp hours remaining and percentage of full.

NOTE: This product requires use of the following:

  • DS2781K Evaluation Kit Software

    Key Features   Applications/Uses
    • Precision Voltage, Temperature, and Current Measurement System
    • Operates in One-Cell or Two--Cell Applications
    • Accurate, Temperature Stable Internal Timebase
    • Absolute and Relative Capacity Estimated from Coulomb Count, Discharge Rate, Temperature, and Battery Cell Characteristics
    • Accurate Warning of Low Battery Conditions
    • Automatic Backup of Coulomb Count and Age Estimation to Nonvolatile (NV) EEPROM
    • Gain and Temperature Coefficient Calibration Allows the Use of Low-Cost Sense Resistors
    • 24-Byte Parameter EEPROM
    • 16-Byte User EEPROM
    • Unique ID and Multidrop 1-Wire® Interface
    • Tiny 8-Pin TSSOP and 10-Pin TDFN (3mm x 4mm) Packages Embed Easily in Thin Prismatic Cell Packs

     
  • Commercial Two-Way Radios
  • Digital Video Cameras
  • Industrial PDAs and Handheld PC Data Terminals
  • Portable GPS Navigation Systems

    Key Specifications:   Battery Protectors, Selectors and Monitors
    Part Number Functions Battery Type Interface User Data Storage (bytes) Parameters Measured Supply Voltage (min) (V) Supply Voltage (max) (V) Features Package Smallest Available Package (max w/pins) (mm2) RoHS Available Operating Temp. Range (°C) Price**
    DS2781 
    Fuel Gauge
    1/2 Cell Li-Ion 1-Wire 40 EEPROM Current
    Temperature
    Voltage
    2.5 10
    Digital Current Accumulation
    On-chip Remaining Capacity Algorithms
    Unique ID
    TDFN/10
    TSSOP/8
    13 Yes -40 to +85 $2.90 @ 1k
    See All Battery Protectors, Selectors and Monitors (21)
    Notes:
    **This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

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    2008-07-03
    This page last modified: 2008-07-03



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