BQ34Z651_15 Datasheet, PDF (1/29 Pages) Texas Instruments – SBS 1.1-Compliant Gas Gauge

bq34z651
www.ti.com
SLUSAL7 – AUGUST 2011
SBS 1.1-Compliant Gas Gauge and Protection Enabled With Impedance Track™ and
External Battery Heater Control
Check for Samples: bq34z651
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-Series to 4-Series
Li-Ion and Li-Polymer Cells
• Battery Temperature Heater Control
• 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
• Drives 3-, 4-, and 5-Segment LED Display 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
APPLICATIONS
• Notebook PCs
• Medical and Test Equipment
• Portable Instrumentation
DESCRIPTION
The bq34z651 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
bq34z651 measures and maintains an accurate
record of available charge in Li-Ion or Li-Polymer
batteries using its integrated high-performance
analog peripherals. The bq34z651 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) short-circuit and
overload protection, the bq34z651 maximizes
functionality and safety while minimizing 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.
T_A
–40°C to 85°C
Table 1. AVAILABLE OPTIONS
PACKAGE ⁽¹⁾
44-PIN TSSOP (DBT) Tube
bq34z651DBT ⁽²⁾
44-PIN TSSOP (DBT) Tape and Reel
bq34z651DBTR ⁽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.
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 © 2011, Texas Instruments Incorporated