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BQ20Z90DBTR-V150-BQ20Z90DBT-V150
SBS v1.1 Compliant Gas Gauge for Use With the bq29330
1FEATURES
APPLICATIONS
DESCRIPTION
bq20z90SLUS778–JULY 2007
www.ti.com
SBS 1.1-COMPLIANT GAS GAUGE ENABLED WITH IMPEDANCE TRACK™
TECHNOLOGY FOR USE WITH THE bq29330 Lifetime Data Logging Patented Impedance Track™ Technology •
30-Pin TSSOP (DBT)
Accurately Measures Available Chargein
Li-Ion and Li-Polymer Batteries Notebook PCs•
Better than 1% Error Over Lifetimeof the
Battery •
Medical and Test Equipment Portable Instrumentation•
Instant Accuracy– No Learning Cycle
Required Automatically adjusts for battery aging,
battery self discharge and temperature The bq20z90 SBS-compliant gas gauge IC,
inefficiencies incorporating patented Impedance Track™
technology,is designed for battery-packor in-system•
Supports the Smart Battery Specification SBS installation. The bq20z90 measures and maintains an
V1.1 accurate record of available charge in Li-ion or•
Works With theTI bq29330 Analog Front-End Li-polymer batteries using its integrated
(AFE) ProtectionICto Provide Complete Pack high-performance analog peripherals. The bq20z90
Electronics Solution monitors capacity change, battery impedance,
open-circuit voltage, and other critical parametersof•
Full Arrayof Programmable Voltage, Current, the battery pack, and reports the informationto the
and Temperature Protection Features system host controller overa serial-communication•
Integrated Time Base Removes Need for bus.Itis designedto work with the bq29330 analog
External Crystal with Optional Crystal Input front-end (AFE) protection IC to maximize•
Electronics for 7.2-V, 10.8-Vor 14.4-V Battery functionality and safety, and minimize component
Packs With 50% Fewer External Components count and costin smart battery circuits.
Based ona Powerful Low-Power RISC CPU The Impedance Track technology continuously
Core With High-Performance Peripherals analyzes the battery impedance, resultingin superior
gas-gauging accuracy. This enables remaining•
Integrated Field Programmable FLASH capacity to be calculated with discharge rate,
Memory Eliminates the Need for External temperature, and cell agingall accounted for during
Configuration Memory each stageof every cycle.•
Measures Charge Flow Usinga
High-Resolution, 16-Bit Integrating AVAILABLE OPTIONS
Delta-Sigma Converter PACKAGE– Better Than 0.65 nVhof Resolution TA 30-PIN TSSOP (DBT) 30-PIN TSSOP (DBT)
Tube Tape& Reel– Self-Calibrating–40°Cto•
Uses 16-Bit Delta-Sigma Converter for bq20z90DBT(1) bq20z90DBTR(2)85°C
Accurate Voltage and Temperature
Measurements Extensive Data Reporting Options For
Improved System Interaction Optional Pulse Charging Feature for Improved
Charge Times Drives 3-,4-or 5-Segment LED Display for
Remaining Capacity Indication (1)A single tube quantityis50 units.
Supports SHA-1 Authentication (2)A single reel quantityis 2000 units
Pleasebe aware thatan important notice concerning availability, standard warranty, and usein critical applicationsof
Not Recommended for New Designs
