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BQ20Z655-R1_13

更新时间： 2024-10-28 12:52:35
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德州仪器 - TI /
页数 文件大小 规格书
25页 863K
描述
SBS 1.1-COMPLIANT GAS GAUGE AND PROTECTION ENABLED WITH IMPEDANCE TRACK™

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bq20z655-R1  
www.ti.com  
SLUSAN9 –AUGUST 2011  
SBS 1.1-COMPLIANT GAS GAUGE AND PROTECTION  
ENABLED WITH IMPEDANCE TRACK™  
Check for Samples: bq20z655-R1  
1
FEATURES  
APPLICATIONS  
2
•
Next Generation Patented Impedance Track™  
Technology Accurately Measures Available  
Charge in Li-Ion and Li-Polymer Batteries  
•
•
•
•
Medical and Test Equipment  
Portable Instrumentation  
Rechargeable Battery Packs  
Industrial Equipment  
–
Better Than 1% Error Over the Lifetime of  
the Battery  
•
•
•
•
Supports the Smart Battery Specification  
SBS V1.1  
DESCRIPTION  
The bq20z655-R1 SBS-compliant gas gauge and  
protection IC, incorporating patented Impedance  
Track™ technology, is a single IC solution designed  
for battery-pack or in-system installation. The  
bq20z655-R1 measures and maintains an accurate  
record of available charge in Li-ion or Li-polymer  
batteries using its integrated high-performance  
analog peripherals. The bq20z655-R1 monitors  
capacity change, battery impedance, open-circuit  
voltage, and other critical parameters of the battery  
pack which reports the information to the system host  
controller over a serial-communication bus. Together  
with the integrated analog front-end (AFE)  
Flexible Configuration for 2-Series to 4-Series  
Li-Ion and Li-Polymer Cells  
Powerful 8-Bit RISC CPU with Ultralow Power  
Modes  
Charge Enable (CE) Affects the Normal  
Operation on the Charge FET when the Battery  
Is in Charge/Relax Mode  
•
Full Array of Programmable Protection  
Features  
–
Voltage, Current, and Temperature  
•
•
Satisfies JEITA Guidelines  
short-circuit  
and  
overload  
protection,  
the  
bq20z655-R1 maximizes functionality and safety  
while minimizing external component count, cost, and  
size in smart battery circuits.  
Added Flexibility to Handle More Complex  
Charging Profiles  
•
•
Lifetime Data Logging  
The implemented Impedance Track™ gas gauging  
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 with high accuracy.  
Drives 3, 4, or 5 Segment Liquid Crystal  
Display and LED for Battery-Pack Conditions  
•
•
Supports SHA-1 Authentication  
Complete Battery Protection and Gas Gauge  
Solution in One Package  
•
Available in a 44-Pin TSSOP (DBT) Package  
Table 1. AVAILABLE OPTIONS  
PACKAGE(1)  
TA  
44-PIN TSSOP (DBT) Tube  
44-PIN TSSOP (DBT) Tape and Reel  
–40°C to 85°C  
bq20z655-R1DBT(2)  
bq20z655-R1DBTR(3)  
(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 40 units.  
(3) A single reel quantity is 2000 units.  
1
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.  
2
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 © 2011, Texas Instruments Incorporated  
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