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DS2782
Stand-Alone Fuel Gauge IC

2-wire stand-alone fuel-gauge IC calculates remaining battery capacity and simplifies software development


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Description
FULL DATA SHEET (PDF, 396kB)
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The DS2782 measures voltage, temperature and current, and estimates available capacity for rechargeable lithium ion and lithium-ion polymer batteries. Cell 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 reported in mAh remaining and percentage of full.

NOTE: This product requires use of the following:

  • DS2782K Evaluation Kit Software

    Key Features   Applications/Uses
    • Precision Voltage, Temperature, and Current Measurement System
    • Accurate Stable Internal Time Base
    • 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 Tempco Calibration Allows the Use of Low-Cost Sense Resistors
    • 24-Byte User EEPROM or 16-Byte User EEPROM and Unique 64-Bit ID
    • Industry 2-Wire Interface with Programmable Slave Address
    • Tiny 8-Pin TSSOP and 10-TDFN Packages Embed Easily in Thin Prismatic Cell Packs

     
  • 3G Multimedia Wireless Handsets
  • Digital Still Cameras
  • Handheld PC Data Terminals
  • Subnotebook Computers

    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 RoHS Available Operating Temp. Range (°C) Price**
    DS2782 
    Fuel Gauge
    1/2 Cell Li-Ion 2-Wire 40 EEPROM Current
    Temperature
    Voltage
    2.5 5.5
    Digital Current Accumulation
    On-chip Remaining Capacity Algorithms
    Unique ID
    TDFN/10
    TSSOP/8
    Yes -40 to +85 $2.24 @ 1k
    See All Battery Protectors, Selectors and Monitors (22)
    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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