BQ20Z75_14 Datasheet, PDF (1/23 Pages) Texas Instruments – SBS 1.1-COMPLIANT GAS GAUGE AND PROTECTION-ENABLED IC

Not Recommended for New Designs
bq20z75
www.ti.com
SLUS723C – JULY 2007 – REVISED JULY 2008
SBS 1.1-COMPLIANT GAS GAUGE AND PROTECTION-ENABLED IC
WITH IMPEDANCE TRACK™
Check for Samples: bq20z75
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 Lifetime of the
Battery
– Instant Accuracy – No Learning Cycle
Required
• 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 Ultra-Low
Power Modes
• Full Array of Programmable Protection
Features
– Voltage, Current and Temperature
• Supports SHA-1 Authentication
• small 38-Pin TSSOP (DBT) Package
APPLICATIONS
• Notebook PCs
• Medical and Test Equipment
• Portable Instrumentation
DESCRIPTION
The bq20z75 SBS-compliant gas gauge and
protection IC is a single IC solution designed for
battery-pack or in-system installation. The bq20z75
measures and maintains an accurate record of
available charge in Li-ion or Li-polymer batteries
using its integrated high-performance analog
peripherals, monitors capacity change, battery
impedance, open-circuit voltage, and other critical
parameters of the battery pack as well and reports
the information to the system host controller over a
serial-communication bus. Together with the
integrated analog front-end (AFE) short-circuit and
overload protection the bq20z75 maximizes
functionality, safety and minimize external component
count, cost and size in smart battery circuits.
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.
Table 1. AVAILABLE OPTIONS
T_A
–40°C to
85°C
PACKAGE
38-PIN TSSOP (DBT)
Tube ⁽¹⁾
38-PIN TSSOP (DBT)
Tape and Reel⁽²⁾
bq20z75DBT
bq20z75DBTR
bq20z75DBT-v160
bq20z75DBTR-v160
(1) A single tube quantity is 50 units.
(2) 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.
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 © 2007–2008, Texas Instruments Incorporated