产品详细信息

Cell chemistry Li-Ion/Li-Polymer Number of series cells 2-4 Cells Communication interface SMBus Battery capacity (Min) (mAh) 500 Battery capacity (Max) (mAh) 15000 Implementation Pack External capacity indication LED Features Coulomb Counter Operating temperature range (C) -20 to 85 Cell balancing
Cell chemistry Li-Ion/Li-Polymer Number of series cells 2-4 Cells Communication interface SMBus Battery capacity (Min) (mAh) 500 Battery capacity (Max) (mAh) 15000 Implementation Pack External capacity indication LED Features Coulomb Counter Operating temperature range (C) -20 to 85 Cell balancing
TSSOP (DBT) 38 43 mm² 4.4 x 9.7
  • Provides Accurate Measurement of Available Charge in Li-Ion and Li-Polymer Batteries
  • Supports the Smart Battery Specification (SBS) V1.1
  • Integrated Time Base Removes Need for External Crystal
  • Works With the TI bq29311 Analog Front End (AFE) Protection IC to Provide Complete Pack Electronics for 10.8-V or 14.4-V Battery Packs With Few External Components
  • Based on a Powerful Low-Power RISC CPU Core With High-Performance Peripherals
  • Integrated FLASH Memory Eliminates the Need for External Configuration EEPROM
  • Measures Charge Flow Using a High Resolution 16-Bit Integrating Converter
    • Better Than 3-nVh of Resolution
    • Self-Calibrating
    • Offset Error Less Than 1-uV
  • Uses 16-Bit Delta Sigma Converter for Accurate Voltage and Temperature Measurements
  • Programmable Cell Modeling for Maximum Battery Fuel Gauge Accuracy
  • Drives 3-, 4-, or 5-Segment LED Display for Remaining Capacity Indication
  • 38-Pin TSSOP (DBT)
  • APPLICATIONS
    • Notebook PCs
    • Medical and Test Equipment
    • Portable Instrumentation

  • Provides Accurate Measurement of Available Charge in Li-Ion and Li-Polymer Batteries
  • Supports the Smart Battery Specification (SBS) V1.1
  • Integrated Time Base Removes Need for External Crystal
  • Works With the TI bq29311 Analog Front End (AFE) Protection IC to Provide Complete Pack Electronics for 10.8-V or 14.4-V Battery Packs With Few External Components
  • Based on a Powerful Low-Power RISC CPU Core With High-Performance Peripherals
  • Integrated FLASH Memory Eliminates the Need for External Configuration EEPROM
  • Measures Charge Flow Using a High Resolution 16-Bit Integrating Converter
    • Better Than 3-nVh of Resolution
    • Self-Calibrating
    • Offset Error Less Than 1-uV
  • Uses 16-Bit Delta Sigma Converter for Accurate Voltage and Temperature Measurements
  • Programmable Cell Modeling for Maximum Battery Fuel Gauge Accuracy
  • Drives 3-, 4-, or 5-Segment LED Display for Remaining Capacity Indication
  • 38-Pin TSSOP (DBT)
  • APPLICATIONS
    • Notebook PCs
    • Medical and Test Equipment
    • Portable Instrumentation

The bq2085 SBS-compliant gas gauge IC for battery pack or in-system installation maintains an accurate record of available charge in Li-ion or Li-polymer batteries. The bq2085 monitors capacity and other critical parameters of the battery pack and reports the information to the system host controller over a serial communication bus. It is designed to work with the bq29311 analog front-end (AFE) protection IC to maximize functionality and safety and minimize component count and cost in smart battery circuits. Using information from the bq2085, the host controller can manage remaining battery power to extend the system run time as much as possible.

The bq2085 uses an integrating converter with continuous sampling for the measurement of battery charge and discharge currents. Optimized for coulomb counting in portable applications, the self-calibrating integrating converter has a resolution better than 3-nVh and an offset measurement error of less than 1-uV (typical). For voltage and temperature reporting, the bq2085 uses a 16-bit A-to-D converter. In conjunction with the bq29311, the onboard ADC also monitors individual cell voltages in a battery pack and allows the bq2085 to generate the control signals necessary to implement the cell balancing and the required safety protection for Li-ion and Li-polymer battery chemistries.

The bq2085 supports the Smart Battery Data (SBData) commands and charge-control functions. It communicates data using the System Management Bus (SMBus) 2-wire protocol. The data available include the battery’s remaining capacity, temperature, voltage, current, and remaining run-time predictions. The bq2085 provides LED drivers and a push-button input to depict remaining battery capacity from full to empty in 20%, 25%, or 33% increments with a 3-, 4-, or 5-segment display.

The bq2085 contains 512 bytes of internal data flash memory, which store configuration information. The information includes nominal capacity and voltage, self-discharge rate, rate compensation factors, and other programmable cell-modeling factors used to accurately adjust remaining capacity for use-conditions based on time, rate, and temperature. The bq2085 also automatically calibrates or learns the true battery capacity in the course of a discharge cycle from programmable near full to near empty levels.

The bq29311 AFE protection IC provides power to the bq2085 from a 3 or 4 series Li-ion cell stack, eliminating the need for an external regulator circuit.

The bq2085 SBS-compliant gas gauge IC for battery pack or in-system installation maintains an accurate record of available charge in Li-ion or Li-polymer batteries. The bq2085 monitors capacity and other critical parameters of the battery pack and reports the information to the system host controller over a serial communication bus. It is designed to work with the bq29311 analog front-end (AFE) protection IC to maximize functionality and safety and minimize component count and cost in smart battery circuits. Using information from the bq2085, the host controller can manage remaining battery power to extend the system run time as much as possible.

The bq2085 uses an integrating converter with continuous sampling for the measurement of battery charge and discharge currents. Optimized for coulomb counting in portable applications, the self-calibrating integrating converter has a resolution better than 3-nVh and an offset measurement error of less than 1-uV (typical). For voltage and temperature reporting, the bq2085 uses a 16-bit A-to-D converter. In conjunction with the bq29311, the onboard ADC also monitors individual cell voltages in a battery pack and allows the bq2085 to generate the control signals necessary to implement the cell balancing and the required safety protection for Li-ion and Li-polymer battery chemistries.

The bq2085 supports the Smart Battery Data (SBData) commands and charge-control functions. It communicates data using the System Management Bus (SMBus) 2-wire protocol. The data available include the battery’s remaining capacity, temperature, voltage, current, and remaining run-time predictions. The bq2085 provides LED drivers and a push-button input to depict remaining battery capacity from full to empty in 20%, 25%, or 33% increments with a 3-, 4-, or 5-segment display.

The bq2085 contains 512 bytes of internal data flash memory, which store configuration information. The information includes nominal capacity and voltage, self-discharge rate, rate compensation factors, and other programmable cell-modeling factors used to accurately adjust remaining capacity for use-conditions based on time, rate, and temperature. The bq2085 also automatically calibrates or learns the true battery capacity in the course of a discharge cycle from programmable near full to near empty levels.

The bq29311 AFE protection IC provides power to the bq2085 from a 3 or 4 series Li-ion cell stack, eliminating the need for an external regulator circuit.

下载

您可能感兴趣的相似产品

open-in-new 比较产品
功能与比较器件相同且具有相同引脚。
BQ2084-V143 正在供货 符合 SBS v1.1 标准的电量监测计,可与 BQ29312A 一起使用 For use with BQ29312A instead of BQ29311

技术文档

star = 有关此产品的 TI 精选热门文档
未找到结果。请清除搜索,并重试。
查看全部 5
类型 项目标题 下载最新的英语版本 日期
* 数据表 SBS-Complaint Gas Gauge IC Use With The bq29311 数据表 26 Sep 2002
应用手册 bq2083, bq2084, and bq2085 Calibration Procedure (Rev. A) 15 Sep 2004
应用手册 Cell-Balancing in the bq208x Advanced Gas Gauge Solutions 17 Mar 2004
应用手册 bq2083 and bq2085 Board Offset Charaterization and Compensation 30 Jan 2004
应用手册 Avoiding Clock Jitter with the bq2085 Advanced Gas Gauge 20 Oct 2003

设计和开发

如需其他信息或资源,请查看下方列表,点击标题即可进入详情页面。

应用软件和框架

GPCCEDV — gpccedv

Gauging Parameter Calculator (GPC) is a math calculation and simulation tool that helps the battery designer to obtain matching Compensated End of Discharge Voltage (CEDV) coefficients for the specific battery profile. The tool allows the user to increase the accuracy of the fuel gauge IC over (...)
支持软件

bq2083-bq2085 EVSW Install v2p5

SLVC167.ZIP (4294 KB)
计算工具

GAUGEPARCAL — 监测参数计算器

监测参数计算器 (GPC) 是一种数学计算和仿真工具,可帮助电池设计人员获取匹配特定电池曲线的补偿放电终点电压 (CEDV) 系数。利用该工具,用户可以提高过热电量监测计 IC 的准确度。
CAD/CAE 符号

MathCAD CEDV Software

SLUC042.ZIP (1031 KB)
封装 引脚数 下载
TSSOP (DBT) 38 了解详情

订购和质量

包含信息:
  • RoHS
  • REACH
  • 器件标识
  • 引脚镀层/焊球材料
  • MSL 等级/回流焊峰值温度
  • MTBF/时基故障估算
  • 材料成分
  • 认证摘要
  • 持续可靠性监测

支持与培训

视频