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BQ2084DBT-V150
SBS v1.1 Compliant Gas Gauge with LED Delay 38-TSSOP -20 to 85
DBT
www.ti.com
FEATURES DESCRIPTION
APPLICATIONS
bq2084-V150
SLUS758–JUNE 2007
SBS v1.1-COMPLIANT GAS GAUGE WITH
LED DELAY Provides Accurate Measurementof Available The bq2084-V150 SBS-compliant gas gauge IC for
Chargein Li-Ion and Li-Polymer Batteries battery packor in-system installation maintains an
accurate record of available charge in Li-ion or•
Supports the Smart Battery SpecificationLi-polymer batteries. The bq2084-V150 monitors
(SBS) V1.1 capacity and other critical parametersof the battery•
Integrated Time Base Removes Need for pack and reports the informationto the system host
External Crystal with Optional Crystal input controller overa serial communication bus.Itis•
Works With theTI bq29312A Analog designedto work with the bq29312A AFE protectionto maximize functionality and safety and minimize
Front-End (AFE) ProtectionICto Providecomponent count and costin smart battery circuits.
Complete Pack Electronics for 7.2-V, 10.8-VorUsing information from the bq2084-V150, the host
14.4-V Battery Packs With Few External controller can manage remaining battery powerto
Components extend the system run timeas muchas possible.•
Based ona Powerful Low-Power RISC CPUThe bq2084-V150 usesan integrating converter with
Core With High-Performance Peripherals continuous sampling for the measurementof battery•
Integrated Flash Memory Eliminates the Need charge and discharge currents. Optimized for
for External Configuration EEPROM coulomb counting in portable applications, the•
Uses 16-Bit Delta Sigma Converter for self-calibrating integrating converter hasa resolution
Accurate Voltage and Temperature better than 0.65-nVh and an offset measurement
errorof less than 1-µV (typical). For voltage and
Measurementstemperature reporting, the bq2084-V150 usesa•
Measures Charge Flow Usinga High 16-bit A-to-D converter. With the bq29312A, the
Resolution 16-Bit Integrating Converter onboard ADC also monitors the pack and individual
– Better Than 0.65-nVhof Resolution cell voltages ina battery pack and allows the
bq2084-V150 to generate the control signals
– Self-Calibratingnecessaryto implement the cell balancing and the
– Offset Error Less Than 1-µV required safety protection for Li-ion and Li-polymer•
Programmable Cell Modeling for Maximum battery chemistries.
Battery Fuel Gauge Accuracy The bq2084-V150 supports the Smart Battery Data•
Drives3-, 4-,or 5-Segment LED Display for (SBData) commands and charge-control functions.It
Remaining Capacity Indication communicates data using the System Management•
Availableina 38-Pin TSSOP (DBT) Package Bus (SMBus) 2-wire protocol. The data available
include the battery's remaining capacity,
temperature, voltage, current, and remaining
run-time predictions.•
Notebook PCsThe bq2084-V150 provides LED drivers anda•
Medical and Test Equipmentpushbutton inputto depict remaining battery capacity•
Portable Instrumentation from fullto emptyin 20%, 25%,or 33% increments
witha 3-, 4-,or 5-segment display.
Not Recommended For New Designs
