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bq20z80-V101
SLUS625D – SEPTEMBER 2004 – REVISED OCTOBER 2005
SBS 1.1-COMPLIANT GAS GAUGE ENABLED WITH IMPEDANCE TRACK ™
TECHNOLOGY FOR USE WITH THE bq29312A
• 38-Pin TSSOP (DBT)
• Patented Impedance Track ™ Technology
Accurately Measures Available Charge in
• Notebook PCsLi-Ion and Li-Polymer Batteries
• Medical and Test Equipment• Better than 1% Error Over Lifetime of the
• Portable InstrumentationBattery
• Instant Accuracy – No Learning Cycle
Required
The bq20z80 SBS-compliant gas gauge IC,• Supports the Smart Battery Specification SBS
incorporating patented Impedance Track technology,V1.1
is designed for battery-pack or in-system installation.• Works With the TI bq29312A Analog
The bq20z80 measures and maintains an accurateFront-End (AFE) Protection IC to Provide
record of available charge in Li-ion or Li-polymerComplete Pack Electronics Solution
batteries using its integrated high-performance
• Full Array of Programmable Voltage, Current, analog peripherals. The bq20z80 monitors capacity
change, battery impedance, open-circuit voltage, andand Temperature Protection Features
other critical parameters of the battery pack, and• Integrated Time Base Removes Need for
reports the information to the system host controllerExternal Crystal with Optional Crystal Input
over a serial-communication bus. It is designed to• Electronics for 7.2-V, 10.8-V or 14.4-V Battery
work with the bq29312A analog front-end (AFE)Packs With Few External Components
protection IC to maximize functionality and safety,
and minimize component count and cost in smart• Based on a Powerful Low-Power RISC CPU
battery circuits.Core With High-Performance Peripherals
• Integrated Field Programmable FLASH The Impedance Track technology continuously
analyzes the battery impedance, resulting in superiorMemory Eliminates the Need for External
gas-gauging accuracy. This enables remainingConfiguration Memory
capacity to be calculated with discharge rate,• Measures Charge Flow Using a
temperature, and cell aging all accounted for duringHigh-Resolution, 16-Bit Integrating
each stage of every cycle.Delta-Sigma Converter
– Better Than 0.65-nVh of Resolution AVAILABLE OPTIONS
– Self-Calibrating PACKAGE
T A– Offset Error Less Than 1- µ V 38-PIN TSSOP (DBT) 38-PIN TSSOP (DBT)
Tube Tape & Reel• Uses 16-Bit Delta-Sigma Converter for
– 40 ° C toAccurate Voltage and Temperature bq20z80DBT-V101 (1) bq20z80DBTR-V101 (2)
85 ° CMeasurements
• Extensive Data Reporting Options For
Improved System Interaction
• Optional Pulse Charging Feature for Improved
Charge Times
• Drives 3-, 4- or 5-Segment LED Display for (1) A single tube quantity is 50 units.
Remaining Capacity Indication (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 © 2004 – 2005, 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.