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


Please check latest availability status for a specific part variant.

Description

The DS2781 remains in production, however, for new projects, we recommend ModelGauge m5 MAX17215 fuel gauge.

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.
DS2781 measures voltage, temperature, and current, and estimates available capacity for rechargeable Lithium-Ion and Lithium-Ion Polymer batteries | Typical Operating Circuit DS2781 measures voltage, temperature, and current, and estimates available capacity for rechargeable Lithium-Ion and Lithium-Ion Polymer batteries | Typical Operating Circuit Enlarge+

Key Features

  • 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

Applications/Uses

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

See parametric specs for Battery Fuel Gauges, Protectors, and Monitors (52)


Part NumberFunctionsBattery TypeInterfaceUser Data Storage
(Bytes)
Parameters MeasuredFuel Gauge AlgorithmApplicationsVSUPPLY
(V)
VSUPPLY
(V)
Package/PinsOper. Temp.
(°C)
Budgetary
Price
minmaxSee Notes
DS2781 Fuel Gauge1-2 Cell Li-Ion1-Wire40 EEPROM
Current
Temperature
Voltage
FuelPackPack2.510
TDFN/10
TSSOP/8
-40 to +85$3.28 @1k

Pricing 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 and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

DS2781EVKIT: Evaluation Kit for the DS2781
Product Reliability Reports: DS2781.pdf 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

Quality Management System >
Environmental Management System >

 
Status:
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