BQ20Z40-R1 Datasheet, PDF (1/16 Pages) Texas Instruments – SBS 1.1-COMPLIANT GAS GAUGE ENABLED WITH IMPEDANCE TRACK™ TECHNOLOGY FOR USE WITH THE bq29330

bq20z40-R1
www.ti.com
SLUS993 – DECEMBER 2009
SBS 1.1-COMPLIANT GAS GAUGE ENABLED WITH IMPEDANCE TRACK™
TECHNOLOGY FOR USE WITH THE bq29330
Check for Samples :bq20z40-R1
FEATURES
1
•2 Next Generation Patented Impedance Track™
Technology Accurately Measures Available
Charge in Li-Ion and Li-Polymer Batteries
– Better Than 1% Error Over the Lifetime of
the Battery
• Supports the Smart Battery Specification
SBS V1.1
• Flexible Configuration for 2 to 4 Series Li-Ion
and Li-Polymer Cells
• Powerful 8-Bit RISC CPU With Ultralow Power
Modes
• Full Array of Programmable Protection
Features
– Voltage, Current, and Temperature
• Satisfies JEITA Guidelines
• Added Flexibility to Handle More Complex
Charging Profiles
• Lifetime Data Logging
• Supports SHA-1 Authentication
• Available in a 20-Pin TSSOP (PW) package
DESCRIPTION
The bq20z40-R1 SBS-compliant gas gauge and
protection IC, incorporating patented Impedance
Track™ technology, is designed for battery-pack or
in-system installation. The bq20z40-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
bq20z40-R1 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
maximizes functionality and safety while minimizing
external 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 the remaining
capacity to be calculated with discharge rate,
temperature, and cell aging that are all accounted for
during each stage of every cycle.
APPLICATIONS
• Notebook PCs
• Medical and Test Equipment
• Portable Instrumentation
Table 1. AVAILABLE OPTIONS
T_A
–40°C to 85°C
20-PIN TSSOP (PW) Tube
bq20z40-R1PW ⁽¹⁾
PACKAGE
(1) A single tube quantity is 50 units.
(2) A single reel quantity is 2000 units
20-PIN TSSOP (PW) Tape & Reel
bq20z40-R1PWR ⁽²⁾
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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.
2
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 © 2009, Texas Instruments Incorporated