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DS2780
Stand-Alone Fuel Gauge IC

Stand-Alone Fuel-Gauge IC Calculates Remaining Battery Capacity and Simplifies Software Development


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Data Sheet
FULL DATA SHEET (PDF, 444kB)
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Errata
  • Errata DS2780 2780A2.pdf 
  • Description
    The DS2780 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:

  • DS2780K Evaluation Kit Software

    Key Features   Applications/Uses
    • Precision Voltage, Temperature, and Current Measurement System
    • Internal Time Base is Accurate and Temperature Stable
    • 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 Battery/Application Parameter EEPROM
    • 16-Byte User EEPROM
    • Unique ID and Multidrop 1-Wire® Interface
    • Tiny 8-pin TSSOP & 10-pin TDFN Package Embeds Easily in Battery Packs Using Thin Prismatic Cells

     
  • 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 Smallest Available Package (max w/pins) (mm2) RoHS Available Operating Temp. Range (°C) Price**
    DS2780 
    Fuel Gauge
    1/2 Cell Li-Ion 1-Wire 40 EEPROM Current
    Temperature
    Voltage
    2.5 5.5
    Digital Current Accumulation
    On-chip Remaining Capacity Algorithms
    Unique ID
    TDFN/10
    TSSOP/8
    13 Yes -40 to +85 $2.70 @ 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.

    Application Notes
  • Application Note 3406: DS2780 Board Layout to Minimize Current Measurement Offset Error - DS2780
  • Application Note 3463: Getting Started with the DS2780 - DS2780
  • Application Note 3489: Installing the DS9123O USB Adapter on Windows® 98 - DS2780
  • Application Note 3584: Storing Battery Fuel Gauge Parameters in DS2780 - DS2780
  • Application Note 4114: Calibrating RSGAIN for the DS278x Family of Fuel Gauges - DS2780

    Evaluation Kits
  • DS2780K

    Design Guides
  • BATTERY MANAGEMENT (PDF)
  • POWER MANAGEMENT FOR BATTERY-POWERED EQUIPMENT (PDF)

    Reliability Reports
  • Reliability Report: DS2780.pdf

    Software/Models
  • DS2780K Evaluation Kit Software

    Ordering Information
    Notes:

    1. Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
    2. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
    3. Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions.
    4. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.


    Devices: 1-4 of 4

    DS2780 Free
    Sample
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    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    Temp RoHS/Lead-Free?
    Materials Analysis
    DS2780G+  
    TDFN;10 pin;13 mm²
    Dwg: 56-G0012-001A (PDF)
    Use pkgcode/variation: T1034+1*
    -40°C to +85°C See data sheet
    DS2780G+T&R  
    TDFN;10 pin;13 mm²
    Dwg: 56-G0012-001A (PDF)
    Use pkgcode/variation: T1034+1*
    -40°C to +85°C See data sheet
    DS2780E+  
    TSSOP;8 pin;14 mm²
    Dwg: 56-G2021-000A (PDF)
    Use pkgcode/variation: H8+2*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS2780E+T&R  
    TSSOP;8 pin;14 mm²
    Dwg: 56-G2021-000A (PDF)
    Use pkgcode/variation: H8+2*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis

    More Information
  • New Product Press Release 2004-12-21 

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     Description 
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    2007-05-09
    This page last modified: 2007-05-09



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