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BQ20Z80-V102_07

更新时间： 2024-11-06 02:52:51
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德州仪器 - TI /
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SBS 1.1-COMPLIANT GAS GAUGE ENABLED WITH IMPEDANCE TRACK TM TECHNOLOGY FOR USE WITH THE BQ29312A

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bq20z80  
bq20z80A  
www.ti.com  
SLUS782–JULY 2007  
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,  
Supports the Smart Battery Specification SBS  
V1.1  
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  
Works With the TI bq29312A Analog  
Front-End (AFE) Protection IC to Provide  
Complete Pack Electronics Solution  
Li-polymer  
batteries  
using  
its  
integrated  
•
•
•
•
•
Full Array of Programmable Voltage, Current,  
and Temperature Protection Features  
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.  
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(1)  
TA  
Offset Error Less Than 1 μV  
38-PIN TSSOP (DBT)  
Tube  
38-PIN TSSOP (DBT)  
Tape and Reel  
•
Uses 16-Bit Delta-Sigma Converter for  
Accurate Voltage and Temperature  
Measurements  
–40°C to  
85°C  
bq20z80ADBT(2)  
bq20z80DBT(2)  
bq20z80ADBTR(3)  
bq20z80DBTR(3)  
–40°C to  
85°C  
•
•
•
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) For the most current package and ordering information, see  
the Package Option Addendum at the end of this document,  
or see the TI website at www.ti.com.  
(2) A single tube quantity is 50 units.  
(3) A single reel quantity is 2000 units  
•
•
Supports SHA-1 Authentication  
Lifetime Data Logging  
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 © 2007, Texas Instruments Incorporated  
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