BQ2085
器件描述：SBS-COMPLIANT GAS GAUGE IC FOR USE WITH THE bq29311
器件厂商：TI [Texas Instruments]
厂商主页：http://www.ti.com/
文件大小：822.45KB，共56页
Sponsor by e络盟器件资料摘要：
bq2085
SLUS541 – OCTOBER 2002
SBS-COMPLIANT GAS GAUGE IC
FOR USE WITH THE bq29311
1
www.ti.com
FEATURES
C0068 Provides Accurate Measurement of Available
Charge in Li-Ion and Li-Polymer Batteries
C0068 Supports the Smart Battery Specification
(SBS) V1.1
C0068 Integrated Time Base Removes Need for
External Crystal
C0068 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
C0068 Based on a Powerful Low-Power RISC CPU
Core With High-Performance Peripherals
C0068 Integrated FLASH Memory Eliminates the
Need for External Configuration EEPROM
C0068 Measures Charge Flow Using a High
Resolution 16-Bit Integrating Converter
– Better Than 3-nVh of Resolution
– Self-Calibrating
– Offset Error Less Than 1-µV
C0068 Uses 16-Bit Delta Sigma Converter for
Accurate Voltage and Temperature
Measurements
C0068 Programmable Cell Modeling for Maximum
Battery Fuel Gauge Accuracy
C0068 Drives 3-, 4-, or 5-Segment LED Display for
Remaining Capacity Indication
C0068 38-Pin TSSOP (DBT)
APPLICATIONS
C0068 Notebook PCs
C0068 Medical and Test Equipment
C0068 Portable Instrumentation
DESCRIPTION
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.
BLOCK DIAGRAM
ADC
Voltage
Sense
Resistor
(10 mΩ - 20 mΩ)
Pack–
Integrating
ADC
Coulomb
Counting
Temp
Sensor
512 Bytes
Config.
FLASH
EPROM
bq2085
Level
Translator
bq29311
LDO
Glueless
Interface
Cell Inputs
Safety Control
SMBus
Pack+
Supply Voltage
Li-Ion
Cells
–
+
Charge/Discharge
Power FETs
–
+
–
+
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Copyright 2002, Texas Instruments Incorporated
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
SLUS541 – OCTOBER 2002
SBS-COMPLIANT GAS GAUGE IC
FOR USE WITH THE bq29311
1
www.ti.com
FEATURES
C0068 Provides Accurate Measurement of Available
Charge in Li-Ion and Li-Polymer Batteries
C0068 Supports the Smart Battery Specification
(SBS) V1.1
C0068 Integrated Time Base Removes Need for
External Crystal
C0068 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
C0068 Based on a Powerful Low-Power RISC CPU
Core With High-Performance Peripherals
C0068 Integrated FLASH Memory Eliminates the
Need for External Configuration EEPROM
C0068 Measures Charge Flow Using a High
Resolution 16-Bit Integrating Converter
– Better Than 3-nVh of Resolution
– Self-Calibrating
– Offset Error Less Than 1-µV
C0068 Uses 16-Bit Delta Sigma Converter for
Accurate Voltage and Temperature
Measurements
C0068 Programmable Cell Modeling for Maximum
Battery Fuel Gauge Accuracy
C0068 Drives 3-, 4-, or 5-Segment LED Display for
Remaining Capacity Indication
C0068 38-Pin TSSOP (DBT)
APPLICATIONS
C0068 Notebook PCs
C0068 Medical and Test Equipment
C0068 Portable Instrumentation
DESCRIPTION
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.
BLOCK DIAGRAM
ADC
Voltage
Sense
Resistor
(10 mΩ - 20 mΩ)
Pack–
Integrating
ADC
Coulomb
Counting
Temp
Sensor
512 Bytes
Config.
FLASH
EPROM
bq2085
Level
Translator
bq29311
LDO
Glueless
Interface
Cell Inputs
Safety Control
SMBus
Pack+
Supply Voltage
Li-Ion
Cells
–
+
Charge/Discharge
Power FETs
–
+
–
+
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Copyright 2002, Texas Instruments Incorporated
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.