BQ20Z655DBTR-R1 Datasheet, PDF (1/25 Pages) Texas Instruments – SBS 1.1-COMPLIANT GAS GAUGE AND PROTECTION

bq20z655-R1
www.ti.com
SBS 1.1-COMPLIANT GAS GAUGE AND PROTECTION
ENABLED WITH IMPEDANCE TRACK™
Check for Samples: bq20z655-R1
SLUSAN9 – AUGUST 2011
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
• 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
• Added Flexibility to Handle More Complex
Charging Profiles
• Lifetime Data Logging
• 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
APPLICATIONS
• Medical and Test Equipment
• Portable Instrumentation
• Rechargeable Battery Packs
• Industrial Equipment
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)
short-circuit and overload protection, the
bq20z655-R1 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
bq20z655-R1DBT ⁽²⁾
44-PIN TSSOP (DBT) Tape and Reel
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.
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