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BQ2084-V143 Datasheet(PDF) 1 Page - Texas Instruments

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Part No. BQ2084-V143
Description  SBS v1.1-COMPLIANT GAS GAUGE FOR USE WITH THE bq29312
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
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BQ2084-V143 Datasheet(HTML) 1 Page - Texas Instruments

 
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FEATURES
DESCRIPTION
APPLICATIONS
bq2084-V143
SLUS732 – SEPTEMBER 2006
SBS v1.1-COMPLIANT GAS GAUGE FOR
USE WITH THE bq29312
Provides Accurate Measurement of Available
The bq2084-V143 SBS-compliant gas gauge IC for
Charge in Li-Ion and Li-Polymer Batteries
battery pack or in-system installation maintains an
accurate record of available charge in Li-ion or
Supports the Smart Battery Specification
Li-polymer batteries. The bq2084-V143 monitors
(SBS) V1.1
capacity and other critical parameters of the battery
Integrated Time Base Removes Need for
pack and reports the information to the system host
External Crystal with Optional Crystal input
controller over a serial communication bus. It is
Works With the TI bq29312 Analog Front-End
designed to work with the bq29312 AFE protection
IC to maximize functionality and safety and minimize
(AFE) Protection IC to Provide Complete Pack
component count and cost in smart battery circuits.
Electronics for 7.2-V, 10.8-V or 14.4-V Battery
Using information from the bq2084-V143, the host
Packs With Few External Components
controller can manage remaining battery power to
Based on a Powerful Low-Power RISC CPU
extend the system run time as much as possible.
Core With High-Performance Peripherals
The bq2084-V143 uses an integrating converter with
Integrated Flash Memory Eliminates the Need
continuous sampling for the measurement of battery
for External Configuration EEPROM
charge
and
discharge
currents.
Optimized
for
Uses 16-Bit Delta Sigma Converter for
coulomb
counting
in
portable
applications,
the
Accurate Voltage and Temperature
self-calibrating integrating converter has a resolution
Measurements
better than 0.65-nVh and an offset measurement
error of less than 1-µV (typical). For voltage and
Measures Charge Flow Using a High
temperature reporting, the bq2084-V143 uses a
Resolution 16-Bit Integrating Converter
16-bit A-to-D converter. With the bq29312, the
– Better Than 0.65-nVh of Resolution
onboard ADC also monitors the pack and individual
– Self-Calibrating
cell voltages in a battery pack and allows the
bq2084-V143
to
generate
the
control
signals
– Offset Error Less Than 1-µV
necessary to implement the cell balancing and the
Programmable Cell Modeling for Maximum
required safety protection for Li-ion and Li-polymer
Battery Fuel Gauge Accuracy
battery chemistries.
Drives 3-, 4-, or 5-Segment LED Display for
The bq2084-V143 supports the Smart Battery Data
Remaining Capacity Indication
(SBData) commands and charge-control functions. It
Available in a 38-Pin TSSOP (DBT) Package
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
Notebook PCs
run-time predictions.
Medical and Test Equipment
The bq2084-V143 provides LED drivers and a
Portable Instrumentation
pushbutton input to depict remaining battery capacity
from full to empty in 20%, 25%, or 33% increments
with a 3-, 4-, or 5-segment display.
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.
PRODUCTION DATA information is current as of publication date.
Copyright © 2006, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.


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