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FEATURES

APPLICATIONS

DESCRIPTION

bq20z80-V102

SLUS681B – NOVEMBER 2005 – REVISED JANUARY 2007

SBS 1.1-COMPLIANT GAS GAUGE ENABLED WITH IMPEDANCE TRACK™

TECHNOLOGY FOR USE WITH THE bq29312A

• Lifetime Data Logging

• Patented Impedance Track™ Technology • 38-Pin TSSOP (DBT)

Accurately Measures Available Charge in

Li-Ion and Li-Polymer Batteries

• Notebook PCs

• Better than 1% Error Over Lifetime of the

Battery

• Medical and Test Equipment

• Portable Instrumentation

• Instant Accuracy – No Learning Cycle

Required

• Supports the Smart Battery Specification SBS

V1.1

The bq20z80 SBS-compliant gas gauge IC,

incorporating patented Impedance Track™

• Works With the TI bq29312A Analog

technology, is designed for battery-pack or in-system

Front-End (AFE) Protection IC to Provide

installation. The bq20z80 measures and maintains

Complete Pack Electronics Solution

an accurate record of available charge in Li-ion or

• Full Array of Programmable Voltage, Current,

Li-polymer batteries using its integrated

and Temperature Protection Features

high-performance analog peripherals. The bq20z80

monitors capacity change, battery impedance,

• Integrated Time Base Removes Need for

open-circuit voltage, and other critical parameters of

External Crystal with Optional Crystal Input

the battery pack, and reports the information to the

• Electronics for 7.2-V, 10.8-V or 14.4-V Battery

system host controller over a serial-communication

Packs With Few External Components

bus. It is designed to work with the bq29312A analog

• Based on a Powerful Low-Power RISC CPU

front-end (AFE) protection IC to maximize

Core With High-Performance Peripherals

functionality and safety, and minimize component

count and cost in smart battery circuits.

• Integrated Field Programmable FLASH

Memory Eliminates the Need for External

The Impedance Track technology continuously

Configuration Memory

analyzes the battery impedance, resulting in superior

gas-gauging accuracy. This enables remaining

• Measures Charge Flow Using a

capacity to be calculated with discharge rate,

High-Resolution, 16-Bit Integrating

temperature, and cell aging all accounted for during

Delta-Sigma Converter

each stage of every cycle.

– Better Than 0.65 nVh of Resolution

– Self-Calibrating

AVAILABLE OPTIONS

– Offset Error Less Than 1 µ V

PACKAGE

• Uses 16-Bit Delta-Sigma Converter for

38-PIN TSSOP (DBT) 38-PIN TSSOP (DBT)

Tube Tape and Reel

Accurate Voltage and Temperature

–40 ° C to

Measurements

bq20z80DBT-V102

(1)

bq20z80DBTR-V102

(2)

85 ° C

• 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

Remaining Capacity Indication

(1) A single tube quantity is 50 units.

• Supports SHA-1 Authentication (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.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

Summary of content (32 pages)

PAGE 1
bq20z80-V102 www.ti.com SLUS681B – NOVEMBER 2005 – REVISED JANUARY 2007 SBS 1.1-COMPLIANT GAS GAUGE ENABLED WITH IMPEDANCE TRACK™ TECHNOLOGY FOR USE WITH THE bq29312A FEATURES • • • • • • • • • • • • • • • • 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.
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bq20z80-V102 www.ti.com SLUS681B – NOVEMBER 2005 – REVISED JANUARY 2007 These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.
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bq20z80-V102 www.ti.com SLUS681B – NOVEMBER 2005 – REVISED JANUARY 2007 TERMINAL FUNCTIONS TERMINAL NO.
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bq20z80-V102 www.ti.com SLUS681B – NOVEMBER 2005 – REVISED JANUARY 2007 ABSOLUTE MAXIMUM RATINGS over operating free-air temperature range (unless otherwise noted) (1) RANGE VDDAand VDDD relative to VSS (2) Supply voltage range V(IOD) relative to VSS (2) Open-drain I/O pins VI relative to VSS (2) –0.3 V to 4.1 V –0.3 V to 6 V Input voltage range to all other pins –0.3 V to VDDA + 0.
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bq20z80-V102 www.ti.com SLUS681B – NOVEMBER 2005 – REVISED JANUARY 2007 POWER-ON RESET VDD = 3 V to 3.6 V, TA = –40°C to 85°C (unless otherwise noted) TYP MAX Negative-going voltage input PARAMETER TEST CONDITIONS 2.1 2.3 2.5 V VHYS Power-on reset hysteresis 50 150 200 mV MAX UNIT 0.25 V UNIT POWER ON RESET BEHAVIOR vs FREE-AIR TEMPERATURE 2.50 140 2.45 135 2.40 130 VIT- 2.35 125 2.30 120 2.25 115 Vhys 2.20 110 2.15 105 2.
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bq20z80-V102 www.ti.com SLUS681B – NOVEMBER 2005 – REVISED JANUARY 2007 DATA FLASH MEMORY CHARACTERISTICS VDD = 3 V to 3.6 V, TA = –40°C to 85°C (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT Data retention See (1) 10 Years Flash programming write-cycles See (1) 20,000 Cycles t(WORDPROG) Word programming time See (1) I(DDPROG) See (1) tDR (1) Flash-write supply current 2 ms 8 15 mA TYP MAX UNIT 10 100 nA Assured by design.
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bq20z80-V102 www.ti.com SLUS681B – NOVEMBER 2005 – REVISED JANUARY 2007 SMBus TIMING SPECIFICATIONS VDD = 3 V to 3.6 V, TA = –40°C to 85°C (unless otherwise noted) PARAMETER TEST CONDITIONS fSMB SMBus operating frequency Slave mode, SMBC 50% duty cycle fMAS SMBus master clock frequency Master mode, no clock low slave extend tBUF Bus free time between start and stop tHD:STA Hold time after (repeated) start tSU:STA Repeated start setup time tSU:STO Stop setup time MIN TYP 10 MAX 100 51.
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bq20z80-V102 www.ti.com SLUS681B – NOVEMBER 2005 – REVISED JANUARY 2007 FEATURE SET NOTE: The bq20z80-V102 is designed to work with the bq29312A AFE. The bq20z80 features are only available with the bq29312A. . Primary (1st Level) Safety Features The bq20z80 supports a wide range of battery and system protection features that can easily be configured.
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bq20z80-V102 www.ti.com SLUS681B – NOVEMBER 2005 – REVISED JANUARY 2007 FEATURE SET (continued) Gas Gauging The bq20z80 uses the Impedance Track™ Technology to measure and calculate the available charge in battery cells. The archievable accuracy is better than the coloumb counting method over the lifetime of the battery and there is no full charge discharge learning cycle required.
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bq20z80-V102 www.ti.com SLUS681B – NOVEMBER 2005 – REVISED JANUARY 2007 FEATURE SET (continued) The performance of the internal oscillator depends on the tolerance of the 100-kΩ resistor between RSOC (pin 33) and VSSA (pin 34). Choose a resistor with a tolerance of ±0.1%, and 50-ppm or better temperature drift. Place this resistor as close as possible to the bq20z80. If a 12-pF crystal is used, place it as close as possible to the XCK1 (pin 34) and XCK2 (pin 33) pins.
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bq20z80-V102 www.ti.com SLUS681B – NOVEMBER 2005 – REVISED JANUARY 2007 FEATURE SET (continued) SBS and Dataflash Values Table 1.
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bq20z80-V102 www.ti.com SLUS681B – NOVEMBER 2005 – REVISED JANUARY 2007 Table 2.
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bq20z80-V102 www.ti.com SLUS681B – NOVEMBER 2005 – REVISED JANUARY 2007 Table 3.
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bq20z80-V102 www.ti.com SLUS681B – NOVEMBER 2005 – REVISED JANUARY 2007 Table 3. DATAFLASH VALUES (continued) Class Subclass ID Subclass Offset Name Data Type Min Value Max Value Default Value Units Charge Control 32 Charge Inhibit Cfg 0 Chg Inhibit Temp Low I2 -400 1200 0 0.1°C 2 Chg Inhibit Temp High I2 -400 1200 450 0.1°C 4 Temp Hys I2 0 100 10 0.1°C 0 Pre-chg Current U2 0 2000 250 mA 2 Pre-chg Temp I2 -400 1200 120 0.
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bq20z80-V102 www.ti.com SLUS681B – NOVEMBER 2005 – REVISED JANUARY 2007 Table 3.
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bq20z80-V102 www.ti.com SLUS681B – NOVEMBER 2005 – REVISED JANUARY 2007 Table 3.
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bq20z80-V102 www.ti.com SLUS681B – NOVEMBER 2005 – REVISED JANUARY 2007 Table 3.
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bq20z80-V102 www.ti.com SLUS681B – NOVEMBER 2005 – REVISED JANUARY 2007 Table 3.
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bq20z80-V102 www.ti.com SLUS681B – NOVEMBER 2005 – REVISED JANUARY 2007 Table 3.
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bq20z80-V102 www.ti.com SLUS681B – NOVEMBER 2005 – REVISED JANUARY 2007 Table 3.
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bq20z80-V102 www.ti.com SLUS681B – NOVEMBER 2005 – REVISED JANUARY 2007 Firmware Version Changes bq20z80-V101 to bq20z80-V102 Changes Table 4. CHANGE DETAILS CHANGE bq0z80-V102 bq20z80-V101 COMMENTS Corrected to allow display to turn off when charging and button pushed. LED display operates correctly during charging. LED display would stay on until Correct operation of the LED charging terminated after the button display under all conditions was pushed.
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bq20z80-V102 www.ti.com SLUS681B – NOVEMBER 2005 – REVISED JANUARY 2007 Table 4. CHANGE DETAILS (continued) CHANGE Correct update of Remcap in relaxed state to use passed charge bq0z80-V102 Charge or discharge current accumulated in a relaxed state used to update Remcap bq20z80-V101 COMMENTS If the relaxed state was exited after the accumulation of significant charge or discharge current (over at most 100 seconds with default values), the RemCap and FCC would be in error by this charge.
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bq20z80-V102 www.ti.com SLUS681B – NOVEMBER 2005 – REVISED JANUARY 2007 Table 4. CHANGE DETAILS (continued) CHANGE bq0z80-V102 bq20z80-V101 Use SBS.AtRate( ), UserRate and C/5 rate for relaxed capacity calculation, respectively, if set by Load Select; otherwise, use previous rate.
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bq20z80-V102 www.ti.com SLUS681B – NOVEMBER 2005 – REVISED JANUARY 2007 CHANGE bq20z80 bq20z80-V101 COMMENTS Improved thermal model A preliminary thermal mode was used. An updated thermal model is used. Improved thermal compensation of Impedance Track™ algorithm Improved cell capacity measurement by limiting valid temperature ranges Valid voltage measurements for cell capacity estimation can occur at any temperature.
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bq20z80-V102 www.ti.com SLUS681B – NOVEMBER 2005 – REVISED JANUARY 2007 CHANGE bq20z80 bq20z80-V101 COMMENTS Corrected the length of SBS.ManufacturerData( ) command SBS.ManufactureData( ) returned additional data not specified in the data sheet. Only returns the appropriate data Correct data set made available to host Changed DF:Charger Present default voltage to 12000 mV DF:Charger Present default was 16800 mV. Default changed to 12000 mV.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 11-Apr-2013 In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.
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PACKAGE MATERIALS INFORMATION www.ti.com 18-Oct-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device BQ20Z80DBTR-V102 Package Package Pins Type Drawing TSSOP DBT 38 SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) 2000 330.0 16.4 Pack Materials-Page 1 6.9 B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant 10.2 1.8 12.0 16.
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PACKAGE MATERIALS INFORMATION www.ti.com 18-Oct-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) BQ20Z80DBTR-V102 TSSOP DBT 38 2000 367.0 367.0 38.
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.