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BQ20Z80-V101_07

更新时间： 2024-11-06 02:52:51
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德州仪器 - TI /
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75页 1287K
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SBS 1.1-COMPLIANT GAS GAUGE ENABLED WITH IMPEDANCE TRACK⑩ TECHNOLOGY FOR USE WITH THE bq29312A

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bq20z80-V101  
www.ti.com  
SLUS625D–SEPTEMBER 2004–REVISED OCTOBER 2005  
SBS 1.1-COMPLIANT GAS GAUGE ENABLED WITH IMPEDANCE TRACK™  
TECHNOLOGY FOR USE WITH THE bq29312A  
FEATURES  
•
38-Pin TSSOP (DBT)  
•
Patented Impedance Track™ Technology  
Accurately Measures Available Charge in  
Li-Ion and Li-Polymer Batteries  
APPLICATIONS  
•
•
•
Notebook PCs  
Medical and Test Equipment  
Portable Instrumentation  
•
•
•
•
Better than 1% Error Over Lifetime of the  
Battery  
Instant Accuracy – No Learning Cycle  
Required  
DESCRIPTION  
The bq20z80 SBS-compliant gas gauge IC,  
incorporating patented Impedance Track technology,  
is designed for battery-pack or in-system installation.  
The bq20z80 measures and maintains an accurate  
record of available charge in Li-ion or Li-polymer  
batteries using its integrated high-performance  
analog peripherals. The bq20z80 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 bq29312A analog front-end (AFE)  
protection IC to maximize functionality and safety,  
and minimize component count and cost in smart  
battery circuits.  
Supports the Smart Battery Specification SBS  
V1.1  
Works With the TI bq29312A 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 Few 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  
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.  
•
Measures Charge Flow Using a  
High-Resolution, 16-Bit Integrating  
Delta-Sigma Converter  
– Better Than 0.65-nVh of Resolution  
– Self-Calibrating  
AVAILABLE OPTIONS  
PACKAGE  
TA  
– Offset Error Less Than 1-µV  
38-PIN TSSOP (DBT)  
Tube  
38-PIN TSSOP (DBT)  
Tape & Reel  
•
Uses 16-Bit Delta-Sigma Converter for  
Accurate Voltage and Temperature  
Measurements  
–40°C to  
85°C  
bq20z80DBT-V101(1)  
bq20z80DBTR-V101(2)  
•
•
•
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 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 © 2004–2005, Texas Instruments Incorporated  
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