BQ2084
器件描述：SBS v1.1 COMPLIANT GAS GAUGE FOR USE WITH THE BQ29312
器件厂商：TI [Texas Instruments]
厂商主页：http://www.ti.com/
文件大小：623.94KB，共63页
Sponsor by e络盟器件资料摘要：
C0098C0113C0050C0048C0056C0052
SLUS550C − DECEMBER 2002 − REVISED JULY 2004
C0083C0066C0083 C0118C0049C0046C0049 C0067C0079C0077C0080C0076C0073C0065C0078C0084 C0071C0065C0083 C0071C0065C0085C0071C0069 C0070C0079C0082
C0085C0083C0069 C0087C0073C0084C0072 C0084C0072C0069 C0098C0113C0050C0057C0051C0049C0050
9,7 mm x 6,4 mm
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 with Optional Crystal input
C0068 Works With the TI bq29312 Analog Front End
(AFE) Protection IC to Provide Complete Pack
Electronics for 7.2-V, 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 Uses 16-Bit Delta Sigma Converter for
Accurate Voltage and Temperature
Measurements
C0068 Measures Charge Flow Using a High
Resolution 16-Bit Integrating Converter
− Better Than 0.65-nVh of Resolution
− Self-Calibrating
− Offset Error Less Than 1-µV
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 bq2084 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
bq2084 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 bq29312 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 bq2084, the host
controller can manage remaining battery power to extend
the system run time as much as possible.
The bq2084 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 0.65-nVh and an
offset measurement error of less than 1-µV (typical). For
voltage and temperature reporting, the bq2084 uses a
16-bit A-to-D converter. In conjunction with the bq29312,
the onboard ADC also monitors the pack and individual
cell voltages in a battery pack and allows the bq2084 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 bq2084 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 bq2084 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.
C0080C0082C0079C0068C0085C0067C0084C0073C0079C0078 C0068C0065C0084C0065 C0105C0110C0102C0111C0114C0109C0097C0116C0105C0111C0110 C0105C0115 C0099C0117C0114C0114C0101C0110C0116 C0097C0115 C0111C0102 C0112C0117C0098C0108C0105C0099C0097C0116C0105C0111C0110 C0100C0097C0116C0101C0046 C0080C0114C0111C0100C0117C0099C0116C0115
C0099C0111C0110C0102C0111C0114C0109 C0116C0111 C0115C0112C0101C0099C0105C0102C0105C0099C0097C0116C0105C0111C0110C0115 C0112C0101C0114 C0116C0104C0101 C0116C0101C0114C0109C0115 C0111C0102 C0084C0101C0120C0097C0115 C0073C0110C0115C0116C0114C0117C0109C0101C0110C0116C0115 C0115C0116C0097C0110C0100C0097C0114C0100 C0119C0097C0114C0114C0097C0110C0116C0121C0046
C0080C0114C0111C0100C0117C0099C0116C0105C0111C0110 C0112C0114C0111C0099C0101C0115C0115C0105C0110C0103 C0100C0111C0101C0115 C0110C0111C0116 C0110C0101C0099C0101C0115C0115C0097C0114C0105C0108C0121 C0105C0110C0099C0108C0117C0100C0101 C0116C0101C0115C0116C0105C0110C0103 C0111C0102 C0097C0108C0108 C0112C0097C0114C0097C0109C0101C0116C0101C0114C0115C0046
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.
www.ti.com
Copyright 2004, Texas Instruments Incorporated
SLUS550C − DECEMBER 2002 − REVISED JULY 2004
C0083C0066C0083 C0118C0049C0046C0049 C0067C0079C0077C0080C0076C0073C0065C0078C0084 C0071C0065C0083 C0071C0065C0085C0071C0069 C0070C0079C0082
C0085C0083C0069 C0087C0073C0084C0072 C0084C0072C0069 C0098C0113C0050C0057C0051C0049C0050
9,7 mm x 6,4 mm
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 with Optional Crystal input
C0068 Works With the TI bq29312 Analog Front End
(AFE) Protection IC to Provide Complete Pack
Electronics for 7.2-V, 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 Uses 16-Bit Delta Sigma Converter for
Accurate Voltage and Temperature
Measurements
C0068 Measures Charge Flow Using a High
Resolution 16-Bit Integrating Converter
− Better Than 0.65-nVh of Resolution
− Self-Calibrating
− Offset Error Less Than 1-µV
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 bq2084 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
bq2084 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 bq29312 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 bq2084, the host
controller can manage remaining battery power to extend
the system run time as much as possible.
The bq2084 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 0.65-nVh and an
offset measurement error of less than 1-µV (typical). For
voltage and temperature reporting, the bq2084 uses a
16-bit A-to-D converter. In conjunction with the bq29312,
the onboard ADC also monitors the pack and individual
cell voltages in a battery pack and allows the bq2084 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 bq2084 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 bq2084 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.
C0080C0082C0079C0068C0085C0067C0084C0073C0079C0078 C0068C0065C0084C0065 C0105C0110C0102C0111C0114C0109C0097C0116C0105C0111C0110 C0105C0115 C0099C0117C0114C0114C0101C0110C0116 C0097C0115 C0111C0102 C0112C0117C0098C0108C0105C0099C0097C0116C0105C0111C0110 C0100C0097C0116C0101C0046 C0080C0114C0111C0100C0117C0099C0116C0115
C0099C0111C0110C0102C0111C0114C0109 C0116C0111 C0115C0112C0101C0099C0105C0102C0105C0099C0097C0116C0105C0111C0110C0115 C0112C0101C0114 C0116C0104C0101 C0116C0101C0114C0109C0115 C0111C0102 C0084C0101C0120C0097C0115 C0073C0110C0115C0116C0114C0117C0109C0101C0110C0116C0115 C0115C0116C0097C0110C0100C0097C0114C0100 C0119C0097C0114C0114C0097C0110C0116C0121C0046
C0080C0114C0111C0100C0117C0099C0116C0105C0111C0110 C0112C0114C0111C0099C0101C0115C0115C0105C0110C0103 C0100C0111C0101C0115 C0110C0111C0116 C0110C0101C0099C0101C0115C0115C0097C0114C0105C0108C0121 C0105C0110C0099C0108C0117C0100C0101 C0116C0101C0115C0116C0105C0110C0103 C0111C0102 C0097C0108C0108 C0112C0097C0114C0097C0109C0101C0116C0101C0114C0115C0046
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.
www.ti.com
Copyright 2004, Texas Instruments Incorporated