BQ20Z90DBT ,SBS 1.1 Compliant Gas Gauge Enabled w/Impedance Track Tech For bq29330 30-TSSOP -40 to 85SLUS662A–DECEMBER 2005–REVISED JUNE 2006TERMINAL FUNCTIONSTERMINAL(1)I/O DESCRIPTIONNO. NAME1 NC – ..
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BQ20Z90DBT
SBS 1.1 Compliant Gas Gauge Enabled w/Impedance Track Tech For bq29330 30-TSSOP -40 to 85
www.ti.com
FEATURES
APPLICATIONS
DESCRIPTION
bq20z90
SLUS662A–DECEMBER 2005–REVISED JUNE 2006
SBS 1.1-COMPLIANT GAS GAUGE ENABLED WITH IMPEDANCE TRACK™
TECHNOLOGY FOR USE WITH THE bq29330•
Patented Impedance Track™ Technology
Accurately Measures Available Chargein
Li-Ion and Li-Polymer Batteries Remaining Capacity Indication Better than 1% Error Over Lifetimeof the •
Supports SHA-1 Authentication
Battery •
Lifetime Data Logging Instant Accuracy– No Learning Cycle •
30-Pin TSSOP (DBT)
Required Automatically adjusts for battery aging,
battery self discharge and temperature •
Notebook PCs
inefficiencies •
Medical and Test Equipment Supports the Smart Battery Specification •
Portable Instrumentation
SBS V1.1 Works With theTI bq29330 Analog Front-End
(AFE) ProtectionICto Provide Complete Pack The bq20z90 SBS-compliant gas gauge IC,
Electronics Solution incorporating patented Impedance Track™
Full Arrayof Programmable Voltage, Current, technology,is designed for battery-packor in-system
installation. The bq20z90 measures and maintains
and Temperature Protection Features accurate recordof available chargein Li-ionor•
Integrated Time Base Removes Need for Li-polymer batteries using its integrated
External Crystal with Optional Crystal Input high-performance analog peripherals. The bq20z90•
Electronics for 7.2-V, 10.8-Vor 14.4-V Battery monitors capacity change, battery impedance,
Packs With 50% Fewer External Components open-circuit voltage, and other critical parametersof
the battery pack, and reports the informationto the•
Based ona Powerful Low-Power RISC CPU system host controller overa serial-communication
Core With High-Performance Peripherals bus.Itis designedto work with the bq29330 analog•
Integrated Field Programmable FLASH front-end (AFE) protection IC to maximize
Memory Eliminates the Need for External functionality and safety, and minimize component
Configuration Memory count and costin smart battery circuits.
Measures Charge Flow Usinga The Impedance Track technology continuously
High-Resolution, 16-Bit Integrating analyzes the battery impedance, resultingin superior
Delta-Sigma Converter gas-gauging accuracy. This enables remaining
capacity to be calculated with discharge rate,
– Better Than 0.65 nVhof Resolutiontemperature, and cell agingall accounted for during
– Self-Calibrating each stageof every cycle.•
Uses 16-Bit Delta-Sigma Converter for
Accurate Voltage and Temperature AVAILABLE OPTIONS PACKAGE Data Reporting Options For TA 30-PIN TSSOP (DBT) 30-PIN TSSOP (DBT) System Tube Tape& Reel(2)A single reel quantityis 2000 units
