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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

Product Details

Key Features

Parametric specs for Battery Fuel Gauges, Protectors, and Monitors
Functions Fuel Gauge
Battery Type 1-2 Cell Li-Ion
Fuel Gauge Algorithm FuelPack
Interface 1-Wire
User Data Storage (Bytes) 40 EEPROM
Parameters Measured Current
Temperature
Voltage
End Equipment Pack
VSUPPLY (V) (min) 2.5
VSUPPLY (V) (max) 10
Package/Pins TDFN/10
TSSOP/8
Oper. Temp. (°C) -40 to +85
Budgetary
Price (See Notes)
3.48
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Simplified Block Diagram

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Parameters

Parametric specs for Battery Fuel Gauges, Protectors, and Monitors
Functions Fuel Gauge
Battery Type 1-2 Cell Li-Ion
Fuel Gauge Algorithm FuelPack
Interface 1-Wire
User Data Storage (Bytes) 40 EEPROM
Parameters Measured Current
Temperature
Voltage
End Equipment Pack
VSUPPLY (V) (min) 2.5
VSUPPLY (V) (max) 10
Package/Pins TDFN/10
TSSOP/8
Oper. Temp. (°C) -40 to +85
Budgetary
Price (See Notes)
3.48

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

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.

Simplified Block Diagram

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 Zoom icon

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .