BQ20Z90-V110 Datasheet, PDF (1/25 Pages) Texas Instruments – SBS 1.1-COMPLIANT GAS GAUGE ENABLED WITH IMPEDANCE TRACK TECHNOLOGY FOR USE WITH THE bq29330

bq20z90-V110
www.ti.com
SLUS743 – NOVEMBER 2006
SBS 1.1-COMPLIANT GAS GAUGE ENABLED WITH IMPEDANCE TRACK™
TECHNOLOGY FOR USE WITH THE bq29330
FEATURES
• Patented Impedance Track™ Technology
Accurately Measures Available Charge in
Li-Ion and Li-Polymer Batteries
• Better than 1% Error Over Lifetime of the
Battery
• Instant Accuracy – No Learning Cycle
Required
• Automatically adjusts for battery aging,
battery self discharge and temperature
inefficiencies
• Supports the Smart Battery Specification SBS
V1.1
• Works With the TI bq29330 Analog Front-End
(AFE) Protection IC to Provide Complete Pack
Electronics Solution
• Full Array of Programmable Voltage, Current,
and Temperature Protection Features
• Integrated Time Base Removes Need for
External Crystal with Optional Crystal Input
• Electronics for 7.2-V, 10.8-V or 14.4-V Battery
Packs With 50% Fewer External Components
• Based on a Powerful Low-Power RISC CPU
Core With High-Performance Peripherals
• Integrated Field Programmable FLASH
Memory Eliminates the Need for External
Configuration Memory
• Measures Charge Flow Using a
High-Resolution, 16-Bit Integrating
Delta-Sigma Converter
– Better Than 0.65 nVh of Resolution
– Self-Calibrating
• Uses 16-Bit Delta-Sigma Converter for
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
• Supports SHA-1 Authentication
• Lifetime Data Logging
• 30-Pin TSSOP (DBT)
APPLICATIONS
• Notebook PCs
• Medical and Test Equipment
• Portable Instrumentation
DESCRIPTION
The bq20z90-V110 SBS-compliant gas gauge IC,
incorporating patented Impedance Track™
technology, is designed for battery-pack or in-system
installation. The bq20z90-V110 measures and
maintains an accurate record of available charge in
Li-ion or Li-polymer batteries using its integrated
high-performance analog peripherals. The
bq20z90-V110 monitors capacity change, battery
impedance, open-circuit voltage, 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 bq29330 analog front-end (AFE) protection IC to
maximize functionality and safety, and minimize
component count and cost in smart battery circuits.
The Impedance Track technology continuously
analyzes the battery impedance, resulting in superior
gas-gauging accuracy. This enables remaining
capacity to be calculated with discharge rate,
temperature, and cell aging all accounted for during
each stage of every cycle.
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.
IMPEDANCE TRACK is a trademark of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2006, Texas Instruments Incorporated