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BQ20Z90

更新时间： 2024-09-16 02:53:07
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德州仪器 - TI /
页数 文件大小 规格书
27页 672K
描述
SBS 1.1-COMPLIANT GAS GAUGE ENABLED WITH IMPEDANCE TRACK⑩ TECHNOLOGY FOR USE WITH THE bq29330

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BQ20Z90 数据手册

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bq20z90  
www.ti.com  
SLUS662A–DECEMBER 2005–REVISED JUNE 2006  
SBS 1.1-COMPLIANT GAS GAUGE ENABLED WITH IMPEDANCE TRACK™  
TECHNOLOGY FOR USE WITH THE bq29330  
FEATURES  
•
Optional Pulse Charging Feature for  
Improved Charge Times  
•
Patented Impedance Track™ Technology  
Accurately Measures Available Charge in  
Li-Ion and Li-Polymer Batteries  
•
Drives 3-, 4- or 5-Segment LED Display for  
Remaining Capacity Indication  
•
•
•
Better than 1% Error Over Lifetime of the  
Battery  
•
•
•
Supports SHA-1 Authentication  
Lifetime Data Logging  
Instant Accuracy – No Learning Cycle  
Required  
30-Pin TSSOP (DBT)  
Automatically adjusts for battery aging,  
battery self discharge and temperature  
inefficiencies  
APPLICATIONS  
•
•
•
Notebook PCs  
Medical and Test Equipment  
Portable Instrumentation  
•
•
Supports the Smart Battery Specification  
SBS V1.1  
DESCRIPTION  
Works With the TI bq29330 Analog Front-End  
(AFE) Protection IC to Provide Complete Pack  
Electronics Solution  
The bq20z90 SBS-compliant gas gauge IC,  
incorporating  
patented  
Impedance  
Track™  
•
•
•
•
•
Full Array of Programmable Voltage, Current,  
and Temperature Protection Features  
technology, is designed for battery-pack or in-system  
installation. The bq20z90 measures and maintains  
an accurate record of available charge in Li-ion or  
Integrated Time Base Removes Need for  
External Crystal with Optional Crystal Input  
Li-polymer  
batteries  
using  
its  
integrated  
high-performance analog peripherals. The bq20z90  
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.  
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  
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.  
– Better Than 0.65 nVh of Resolution  
– Self-Calibrating  
•
•
Uses 16-Bit Delta-Sigma Converter for  
Accurate Voltage and Temperature  
Measurements  
AVAILABLE OPTIONS  
PACKAGE  
Extensive Data Reporting Options For  
Improved System Interaction  
TA  
30-PIN TSSOP (DBT)  
Tube  
30-PIN TSSOP (DBT)  
Tape & Reel  
–40°C to  
85°C  
bq20z90DBT(1)  
bq20z90DBTR(2)  
(1) A single tube quantity is 50 units.  
(2) A single reel quantity is 2000 units  
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 © 2005–2006, Texas Instruments Incorporated  
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