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Stand-Alone Fuel Gauge IC

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

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 2-Wire
User Data Storage (Bytes) 40 EEPROM
Parameters Measured Current
Temperature
Voltage
End Equipment Pack
VSUPPLY (V) (min) 2.5
VSUPPLY (V) (max) 5.5
Package/Pins TDFN/10
TSSOP/8
Oper. Temp. (°C) -40 to +85
Budgetary
Price (See Notes)
3.05
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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 2-Wire
User Data Storage (Bytes) 40 EEPROM
Parameters Measured Current
Temperature
Voltage
End Equipment Pack
VSUPPLY (V) (min) 2.5
VSUPPLY (V) (max) 5.5
Package/Pins TDFN/10
TSSOP/8
Oper. Temp. (°C) -40 to +85
Budgetary
Price (See Notes)
3.05

Key Features

  • 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

Applications/Uses

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

Description

The DS2782 remains in production, however, for new projects, we recommend ModelGauge m5 MAX17201 fuel gauge.

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.

Simplified Block Diagram

DS2782 measures voltage, temperature and current, and estimates available capacity for rechargeable lithium ion and lithium-ion polymer batteries | Typical Operating Circuit DS2782 measures voltage, temperature and current, and estimates available capacity for rechargeable lithium ion and lithium-ion polymer batteries | Typical Operating Circuit Zoom icon

Technical Docs

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 .