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bq20z80-V102
SLUS681A – NOVEMBER 2005 – REVISED MARCH 2006
SBS 1.1-COMPLIANT GAS GAUGE ENABLED WITH IMPEDANCE TRACK ™
TECHNOLOGY FOR USE WITH THE bq29312A
• Optional Pulse Charging Feature for Improved
Charge Times• Patented Impedance Track ™ Technology
Accurately Measures Available Charge in • Drives 3-, 4- or 5-Segment LED Display for
Li-Ion and Li-Polymer Batteries Remaining Capacity Indication
• Better than 1% Error Over Lifetime of the • Supports SHA-1 Authentication
Battery • Lifetime Data Logging
• Instant Accuracy – No Learning Cycle • 38-Pin TSSOP (DBT)
Required
• Supports the Smart Battery Specification SBS
V1.1 • Notebook PCs
• Works With the TI bq29312A Analog • Medical and Test Equipment
Front-End (AFE) Protection IC to Provide • Portable Instrumentation
Complete Pack Electronics Solution
• Full Array of Programmable Voltage, Current,
and Temperature Protection Features The bq20z80 SBS-compliant gas gauge IC,
• Integrated Time Base Removes Need for incorporating patented Impedance Track ™
External Crystal with Optional Crystal Input technology, is designed for battery-pack or in-system
installation. The bq20z80 measures and maintains an• Electronics for 7.2-V, 10.8-V or 14.4-V Battery
accurate record of available charge in Li-ion orPacks With Few External Components
Li-polymer batteries using its integrated• Based on a Powerful Low-Power RISC CPU
high-performance analog peripherals. The bq20z80Core With High-Performance Peripherals
monitors capacity change, battery impedance,
open-circuit voltage, and other critical parameters of• Integrated Field Programmable FLASH
the battery pack, and reports the information to theMemory Eliminates the Need for External
system host controller over a serial-communicationConfiguration Memory
bus. It is designed to work with the bq29312A analog• Measures Charge Flow Using a
front-end (AFE) protection IC to maximizeHigh-Resolution, 16-Bit Integrating
functionality and safety, and minimize componentDelta-Sigma Converter
count and cost in smart battery circuits.
– Better Than 0.65 nVh of Resolution The Impedance Track technology continuously
– Self-Calibrating analyzes the battery impedance, resulting in superior
gas-gauging accuracy. This enables remaining– Offset Error Less Than 1 µ V
capacity to be calculated with discharge rate,• Uses 16-Bit Delta-Sigma Converter for
temperature, and cell aging all accounted for duringAccurate Voltage and Temperature
each stage of every cycle.Measurements
• Extensive Data Reporting Options For AVAILABLE OPTIONS
Improved System Interaction PACKAGE
T A 38-PIN TSSOP (DBT) 38-PIN TSSOP (DBT)
Tube Tape & Reel
– 40 ° C to bq20z80DBT-V102 (1) bq20z80DBTR-V102 (2)
85 ° C
(1) A single tube quantity is 50 units.
(2) A single reel quantity is 2000 units
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.
PRODUCTION DATA information is current as of publication date. Copyright © 2005 – 2006, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.