Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsPMICsPMIC - battery management Charge indicator Li-Ion, Li-Po TSSOP 38 Surface-mount

FEATURES

DESCRIPTION

APPLICATIONS

bq20z45

www.ti.com

.................................................................................................................................................................................................. SLUS800 – MARCH 2009

SBS 1.1-Compliant Gas Gauge and Protection Enabled With Impedance Track™

• Next Generation Patented Impedance Track™

Technology Accurately Measures Available

The bq20z45 SBS-compliant gas gauge and

Charge in Li-Ion and Li-Polymer Batteries

protection IC is a single IC solution designed for

battery-pack or in-system installation. The bq20z45

– Better Than 1% Error Over the Lifetime of

measures and maintains an accurate record of

the Battery

available charge in Li-ion or Li-polymer batteries

• Supports the Smart Battery Specification

using its integrated high-performance analog

SBS V1.1

peripherals, monitors capacity change, battery

• Flexible Configuration for 2 to 4 Series Li-Ion

impedance, open-circuit voltage, and other critical

parameters of the battery pack as well and reports

and Li-Polymer Cells

the information to the system host controller over a

• Powerful 8-Bit RISC CPU With Ultralow Power

serial-communication bus. Together with the

Modes

integrated analog front-end (AFE) short-circuit and

• Full Array of Programmable Protection

overload protection, the bq20z45 maximizes

Features

functionality and safety while minimizing external

component count, cost, and size in smart battery

– Voltage, Current, and Temperature

circuits.

• Satisfies JEITA Guidelines

The implemented Impedance Track™ gas gauging

• Added Flexibility to Handle More Complex

technology continuously analyzes the battery

Charging Profiles

impedance, resulting in superior gas-gauging

• Lifetime Data Logging

accuracy. This enables remaining capacity to be

• Supports SHA-1 Authentication

calculated with discharge rate, temperature, and cell

aging all accounted for during each stage of every

• Complete Battery Protection and Gas Gauge

cycle with high accuracy.

Solution in One Package

• Available in a 38-Pin TSSOP (DBT) package

• Notebook PCs

• Medical and Test Equipment

• Portable Instrumentation

AVAILABLE OPTIONS

PACKAGE

(1)

38-PIN TSSOP (DBT) Tube 38-PIN TSSOP (DBT) Tape and Reel

– 40 ° C to 85 ° C bq20z45DBT

(2)

bq20z45DBTR

(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 50 units.

(3) 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.

2 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 (22 pages)

PAGE 1
bq20z45 www.ti.com .................................................................................................................................................................................................. SLUS800 – MARCH 2009 SBS 1.
PAGE 2
bq20z45 SLUS800 – MARCH 2009 .................................................................................................................................................................................................. www.ti.com 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.
PAGE 3
bq20z45 www.ti.com .................................................................................................................................................................................................. SLUS800 – MARCH 2009 PIN FUNCTIONS PIN I/O (1) DESCRIPTION NO. NAME 1 DSG O 2 PACK IA, P 3 VCC P Positive device supply input.
PAGE 4
bq20z45 SLUS800 – MARCH 2009 .................................................................................................................................................................................................. www.ti.com ABSOLUTE MAXIMUM RATINGS over operating free-air temperature (unless otherwise noted) (1) PIN VSS Supply voltage range UNIT BAT, VCC –0.3 V to 34 V PACK, PMS –0.3 V to 34 V VC(n)-VC(n+1); n = 1, 2, 3, 4 –0.3 V to 8.5 V VC1, VC2, VC3, VC4 –0.3 V to 34 V VC5 –0.
PAGE 5
bq20z45 www.ti.com .................................................................................................................................................................................................. SLUS800 – MARCH 2009 ELECTRICAL CHARACTERISTICS over operating free-air temperature range (unless otherwise noted), TA = –40°C to 85°C, V(REG25) = 2.41 V to 2.59 V, V(BAT) = 14 V, C(REG25) = 1 µF, C(REG33) = 2.
PAGE 6
bq20z45 SLUS800 – MARCH 2009 .................................................................................................................................................................................................. www.ti.com ELECTRICAL CHARACTERISTICS (continued) over operating free-air temperature range (unless otherwise noted), TA = –40°C to 85°C, V(REG25) = 2.41 V to 2.59 V, V(BAT) = 14 V, C(REG25) = 1 µF, C(REG33) = 2.
PAGE 7
bq20z45 www.ti.com .................................................................................................................................................................................................. SLUS800 – MARCH 2009 ELECTRICAL CHARACTERISTICS (continued) over operating free-air temperature range (unless otherwise noted), TA = –40°C to 85°C, V(REG25) = 2.41 V to 2.59 V, V(BAT) = 14 V, C(REG25) = 1 µF, C(REG33) = 2.
PAGE 8
bq20z45 SLUS800 – MARCH 2009 .................................................................................................................................................................................................. www.ti.com ELECTRICAL CHARACTERISTICS (continued) over operating free-air temperature range (unless otherwise noted), TA = –40°C to 85°C, V(REG25) = 2.41 V to 2.59 V, V(BAT) = 14 V, C(REG25) = 1 µF, C(REG33) = 2.
PAGE 9
bq20z45 www.ti.com .................................................................................................................................................................................................. SLUS800 – MARCH 2009 DATA FLASH CHARACTERISTICS OVER RECOMMENDED OPERATING TEMPERATURE AND SUPPLY VOLTAGE Typical Values at TA = 25°C and V(REG25) = 2.
PAGE 10
bq20z45 SLUS800 – MARCH 2009 .................................................................................................................................................................................................. www.ti.com TLOW SCLK TR THD:STA THD:STA TF THIGH THD:DAT TSU:STA TSU:STO TSU:DAT SDATA TBUF P S S P Start Stop TLOW:SEXT SCLKACK† SCLKACK† TLOW:MEXT TLOW:MEXT TLOW:MEXT SCLK SDATA A. SCLKACK is the acknowledge-related clock pulse generated by the master. Figure 1.
PAGE 11
bq20z45 www.ti.com .................................................................................................................................................................................................. SLUS800 – MARCH 2009 FEATURE SET Primary (1st Level) Safety Features The bq20z45 supports a wide range of battery and system protection features that can easily be configured.
PAGE 12
bq20z45 SLUS800 – MARCH 2009 .................................................................................................................................................................................................. www.ti.com Lifetime Data Logging Features The bq20z45 offers lifetime data logging, where important measurements are stored for warranty and analysis purposes.
PAGE 13
bq20z45 www.ti.com .................................................................................................................................................................................................. SLUS800 – MARCH 2009 Voltage The bq20z45 updates the individual series cell voltages at one second intervals. The internal ADC of the bq20z45 measures the voltage, scales and calibrates it appropriately.
PAGE 14
bq20z45 SLUS800 – MARCH 2009 .................................................................................................................................................................................................. www.ti.com COMMUNICATIONS The bq20z45 uses SMBus v1.1 with Master Mode and package error checking (PEC) options per the SBS specification. SMBus On and Off State The bq20z45 detects an SMBus off state when SMBC and SMBD are logic-low for ≥ 2 seconds.
PAGE 15
bq20z45 www.ti.com .................................................................................................................................................................................................. SLUS800 – MARCH 2009 Table 2.
PAGE 16
bq20z45 SLUS800 – MARCH 2009 .................................................................................................................................................................................................. www.ti.
PAGE 17
PACKAGE OPTION ADDENDUM www.ti.com 25-Jan-2010 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Drawing Pins Package Eco Plan (2) Qty BQ20Z45DBT NRND TSSOP DBT 38 BQ20Z45DBTR NRND TSSOP DBT 38 50 Lead/Ball Finish MSL Peak Temp (3) Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR 2000 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs.
PAGE 18
PACKAGE MATERIALS INFORMATION www.ti.com 14-Jul-2012 TAPE AND REEL INFORMATION *All dimensions are nominal Device BQ20Z45DBTR 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.
PAGE 19
PACKAGE MATERIALS INFORMATION www.ti.com 14-Jul-2012 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) BQ20Z45DBTR TSSOP DBT 38 2000 367.0 367.0 38.
PAGE 20
PAGE 21
PAGE 22
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 JESD46C and to discontinue any product or service per JESD48B. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.