Texas Instruments bq2083EVM-001 User manual


    
 
November 2002 High Performance Analog
User’s Guide
SLUU133

IMPORTANT NOTICE
Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications,
enhancements, improvements, and other changes to its products and services at any time and to discontinue
any product or service without notice. Customers should obtain the latest relevant information before placing
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TI warrants performance of its hardware products to the specifications applicable at the time of sale in
accordance with TI’s standard warranty. Testing and other quality control techniques are used to the extent TI
deems necessary to support this warranty. Except where mandated by government requirements, testing of all
parameters of each product is not necessarily performed.
TI assumes no liability for applications assistance or customer product design. Customers are responsible for
their products and applications using TI components. To minimize the risks associated with customer products
and applications, customers should provide adequate design and operating safeguards.
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Mailing Address:
Texas Instruments
Post Office Box 655303
Dallas, Texas 75265
Copyright 2002, Texas Instruments Incorporated

EVM IMPORTANT NOTICE
Texas Instruments (TI) provides the enclosed product(s) under the following conditions:
This evaluation kit being sold by TI is intended for use for ENGINEERING DEVELOPMENT OR EVALUATION
PURPOSES ONLY and is not considered by TI to be fit for commercial use. As such, the goods being provided
may not be complete in terms of required design-, marketing-, and/or manufacturing-related protective
considerations, including product safety measures typically found in the end product incorporating the goods.
As a prototype, this product does not fall within the scope of the European Union directive on electromagnetic
compatibility and therefore may not meet the technical requirements of the directive.
Should this evaluation kit not meet the specifications indicated in the EVM User’s Guide, the kit may be returned
within 30 days from the date of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE
WARRANTY MADE BY SELLER TO BUYER AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED,
IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY
PARTICULAR PURPOSE.
The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user
indemnifies TI from all claims arising from the handling or use of the goods. Please be aware that the products
received may not be regulatory compliant or agency certified (FCC, UL, CE, etc.). Due to the open construction
of the product, it is the user’s responsibility to take any and all appropriate precautions with regard to electrostatic
discharge.
EXCEPT TO THE EXTENT OF THE INDEMNITY SET FORTH ABOVE, NEITHER PARTY SHALL BE LIABLE
TO THE OTHER FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES.
TI currently deals with a variety of customers for products, and therefore our arrangement with the user is not
exclusive.
TI assumes no liability for applications assistance, customer product design, software performance, or
infringement of patents or services described herein.
Please read the EVM User’s Guide and, specifically, the EVM Warnings and Restrictions notice in the EVM
User’s Guide prior to handling the product. This notice contains important safety information about temperatures
and voltages. For further safety concerns, please contact the TI application engineer.
Persons handling the product must have electronics training and observe good laboratory practice standards.
No license is granted under any patent right or other intellectual property right of TI covering or relating to any
machine, process, or combination in which such TI products or services might be or are used.
Mailing Address:
Texas Instruments
Post Office Box 655303
Dallas, Texas 75265
Copyright 2002, Texas Instruments Incorporated

EVM WARNINGS AND RESTRICTIONS
It is important to operate this EVM within the input voltage range of 6 V to 25 V and the output
voltage range of 6 V to 25 V.
Exceeding the specified input range may cause unexpected operation and/or irreversible
damage to the EVM. If there are questions concerning the input range, please contact a TI
field representative prior to connecting the input power.
Applying loads outside of the specified output range may result in unintended operation and/or
possible permanent damage to the EVM. Please consult the EVM User’s Guide prior to
connecting any load to the EVM output. If there is uncertainty as to the load specification,
please contact a TI field representative.
During normal operation, some circuit components may have case temperatures greater than
60°C. The EVM is designed to operate properly with certain components above 60°C as long
as the input and output ranges are maintained. These components include but are not limited
to linear regulators, switching transistors, pass transistors, and current sense resistors. These
types of devices can be identified using the EVM schematic located in the EVM User’s Guide.
When placing measurement probes near these devices during operation, please be aware
that these devices may be very warm to the touch.
Mailing Address:
Texas Instruments
Post Office Box 655303
Dallas, Texas 75265
Copyright 2002, Texas Instruments Incorporated

Trademarks
v
Preface

About This Manual
This user’s guide describes the bq2083/bq29311 evaluation module (EVM)
and contains the EVM schematic, bill of materials, assembly drawing, and
board layouts.
How to Use This Manual
This document contains the following chapters:
-Chapter 1—Introduction
-Chapter 2—bq2083/bq29311-Based Circuit Module and Schematic
-Chapter 3—Circuit Module Physical Layouts and Bill of Materials
-Chapter 4—bq2083/bq29311EVM-001 Circuit Module Performance
Specification Summary
-Chapter 5—EVM Hardware and Software Setup
-Chapter 6—Operation
FCC Warning
This equipment is intended for use in a laboratory test environment only. It gen-
erates, uses, and can radiate radio frequency energy and has not been tested
for compliance with the limits of computing devices pursuant to subpart J of
part 15 of FCC rules, which are designed to provide reasonable protection
against radio frequency interference. Operation of this equipment in other en-
vironments may cause interference with radio communications, in which case
the user at his own expense will be required to take whatever measures may
be required to correct this interference.
Trademarks
Windowsis a trademark of Microsoft. All other trademarks are the property of their
respective owners.

Trademarks
vi
Electrostatic Sensitive Devices
This EVM contains components that can potentially be damaged by
electrostatic discharge. Always transport and store the EVM in its
supplied ESD bag when not in use. Handle using an antistatic
wristband. Operate on an antistatic work surface. For more
information on proper handling, refer to SSYA008.

Contents
vii

1 Introduction 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.1 Features 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 Kit Contents 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3 Ordering Information 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 bq2083/bq29311-Based Circuit Module and Schematic 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1 Pin Descriptions 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2 bq2083/bq29311EVM−001 Circuit Module Schematic 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . .
3 Circuit Module Physical Layouts and Bill of Materials 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1 Board Layout 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2 Bill of Materials 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4 bq2083/bq29311 Circuit Module Performance Specification Summary 4-1. . . . . . . . . . . . . . .
5 EVM Hardware and Software Setup 5-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1 Software Installation 5-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2 Hardware Connection 5-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2.1 Connecting the bq2083/bq29311EVM−001 Circuit Module to a Battery Pack 5-2
5.2.2 PC Interface Connection 5-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6 Operation 6-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.1 Starting the Program 6-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.2 Setting Programmable bq2083 and bq29311 Options 6-4. . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.3 Calibration of a bq2083/bq29311-Based Module Using the EV2200-83 Software 6-6. . . .
6.4 Direct Access Communication 6-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Contents
viii

2−1 bq2083EVM-001 Schematic 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3−1 bq2083EVM-001 Layout 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5−1 bq2083/bq29311 Circuit Module Connection to Cells and System Load/Charger 5-2. . . . . . .
6−1 SBS Data Screen 6-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6−2 SBS Data Screen—Status Bit Window 6-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6−3 Flash Data Screen 6-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6−4 SBS Data Screen—AFE Configuration and Module Calibration Locations 6-5. . . . . . . . . . . .
6−5 Calibration Screen 6-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6−6 Pro Screen 6-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1−1 Ordering Information 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3−1 bq2083EVM-001 Bill of Materials 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−1 Performance Specification Summary 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5−1 Circuit Module to EV2200 Connections 5-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6−1 Example Log File 6-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-1
Introduction

This EVM is a complete evaluation system for the bq2083/bq29311 battery
management system. The EVM includes one bq2083/bq29311 circuit module,
a current sense resistor, a thermistor, an EV2200 PC interface board for gas
gauge interface, a PC serial cable, and Windows-based PC software. The
circuit module includes one bq2083 IC, one bq29311 IC and all other
necessary components onboard. The circuit monitors and predicts capacity,
performs cell balancing, monitors critical parameters, protects the cells from
overcharge, over discharge, short circuit, and overcurrent in 3- or 4-series cell
Li-Ion or Li-Polymer battery packs. The circuit module connects directly across
the cells in a battery. With the EV2200 interface board and software, the user
can read the bq2083 data registers, program the chipset for different pack
configurations, log cycling data for further evaluation and evaluate the overall
functionality of the bq2083/bq29311 solution under different charge and
discharge conditions.
Topic Page
1.1 Features 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 Kit Contents 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3 Ordering Information 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 1

Features
1-2
1.1 Features
-Complete evaluation system for the bq2083 SBS 1.1−compliant advanced
gas gauge and the bq29311 analog front end and protection IC
-Populated circuit module for quick setup
-PC software and interface board for easy evaluation
-Software that allows data logging for system analysis
1.2 Kit Contents
-bq2083/bq29311 circuit module
-Sense resistor
-EV2200 PC interface board
-Set of evaluation software disks entitled EV2200-83
-PC serial cable
-Set of support documentation
1.3 Ordering Information
Table 1−1.Ordering Information
EVM Part Number Chemistry Configuration Capacity
bq2083EVM−001 Li-Ion 3 or 4 cell Any

2-1
bq2083/bq29311-Based Circuit Module and Schematic
  ! 
"#
The bq2083/bq29311-based circuit module is a complete and compact
example solution of a bq2083 and bq29311 circuit for battery management
and protection of Li-Ion or Li-Polymer packs. The circuit module incorporates
a bq2083 battery monitor IC, bq29311 AFE and protection IC and all other
components necessary to accurately predict the capacity of 3- or 4-series
cells.
Contacts on the circuit module provide direct connection to the cells (BAT−, 1P,
2P, 3P, BAT+) and the serial communications port (SMBC, SMBC). The
system load and charger connect across PACK+ and PACK−.
The SAFE output reflects the state of the safety output from the bq2083 and
has extra ESD protection just for evaluation purposes.
Topic Page
2.1 Pin Descriptions 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2 bq2083/bq29311 Circuit Module Schematic 2-3. . . . . . . . . . . . . . . . . . . . . .
Chapter 2

Pin Descriptions
2-2
2.1 Pin Descriptions
BAT− −ve connection of first (bottom) cell
1P +ve connection of first (bottom) cell
2P +ve connection of second cell
3P +ve connection of third cell
BAT+ +ve connection of fourth (top) cell
SMBC Serial communication port clock
SMBD Serial communication data port
SAFE bq2083 safety output
PACK− Pack negative terminal
VSS Pack negative terminal
PACK+ Pack positive terminal

bq2083/bq29311 Circuit Module Schematic
2-3
bq2083/bq29311-Based Circuit Module and Schematic
2.2 bq2083/bq29311 Circuit Module Schematic
The schematic shows the circuit for the bq2083/bq29311 implementation.
Figure 2−1.bq2083EVM-001 Schematic

2-4

3-1
Circuit Module Physical Layouts and Bill of Materials
 ! $% &%   '
!
This chapter contains the board layout and assembly drawings for the
bq2083/bq29311circuit module.
Topic Page
3.1 Board Layout 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2 Bill of Materials 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 3

Board Layout
3-2
3.1 Board Layout
Figure 3−1 shows the dimensions, PCB layers, and assembly drawing for the
bq2083/bq29311 module.
Figure 3−1.bq2083EVM-001 Layout

Bill of Materials
3-3
Circuit Module Physical Layouts and Bill of Materials
3.2 Bill of Materials
Table 3−1 lists materials required for the bq2083/bq29311 circuit module.
Table 3−1.bq2083EVM-001 Bill of Materials
Qty
−001 Reference Description Size MFR Part Number
7C1, C2, C3, C4,
C6, C7, C20 Capacitor, ceramic, .01 µF, 25 V, X7R 603 Any
1 C8 Capacitor, ceramic,
0.047 µF, 16 V, X7R 603 Any
4C13, C15, C16,
C19 Capacitor, ceramic, 0.47 µF, 16 V, X7R 603 Any
1 C17 Capacitor, ceramic, 2200 pF,
16 V, X7R 603 Any
1 C18 Capacitor, ceramic, 150 pF,
16 V, X7R 603 Any
6C5, C9, C10,
C11, C12, C14 Capacitor, ceramic, 0.1 µF, 16 V, X7R 603 Any
1 D1 Diode, dual ultra fast, series,
BAV99, 200 mA, 70 V SOT23 Fairchild BAV99
4D2, D4, D5, D7 Diode, LED, green, gullwing,
GW Type, 20 mA, 7.5 mcd
typ
SMT Panasonic LN1361C
3D3, D6, D8 Diode, Zener, 5.6 V, 350
mW SOT23 Diodes, Inc. BZX84C5v6T
4J1, J2, J3, J4 Terminal Block, 3 pin, 6 A,
3,5 mm TH OST ED1515
3Q1, Q2, Q3 MOSFET, P-channel, 30 V,
8.0 A, 20 mΩ
S08 Siliconix Si4435DY
11 R1, R2, R3, R4,
R5, R18, R26,
R27, R32, R33,
R36
Resistor, chip, 100 Ω, 1/16
W, 5% 603 Std Std
5R10, R12, R16,
R30, R34 Resistor, chip, 1 MΩ, 1/16 W, 5% 603 Std Std
3R11, R13, R17 Resistor, chip, 5.1 kΩ,
1/16 W, 5% 603 Std Std
3R14, R15, R24 Resistor, chip, 100 Ω,
1/16 W, 5% 603 Std Std
2R20, R21 Resistor, chip, 10 Ω, 1/16 W,
5% 603 Std Std
4R23, R25, R28,
R31 Resistor, chip, 470 Ω,
1/16 W, 5% 603 Std Std
2R29, R37 Resistor, chip, 61.9 kΩ,
1/16 W, 1% 603 Std Std

Bill of Materials
3-4
Qty
−001 Part NumberMFRSizeDescriptionReference
1 R35 Resistor, chip, 8.45 kΩ,
1/16 W, 1% 603 Std Std
1R6 *** Resistor, chip, 0.02 Ω, 1 W,
1% 2512 Vishay/Dale WSL−2512−R02
Table 3−1. bq2083EVM-001 Bill of Materials (Continued)
Qty
−001 Reference Description Size MFR Part Number
3R19, R22, R38 Resistor, chip, 100 kΩ,
1/16 W, 5% 603 Std Std
0 R7 Resistor, chip, 100 kΩ,
1/16 W, 5% 603 Std Std
0 R8 Resistor, chip, 0 Ω, 1/16 W,
5% 603 Std Std
1 R9 Resistor, chip, 300 Ω, 1 W,
5% 2512 Vishay/Dale CRCW2512LR301
1RT1 Thermistor,10 kΩ, 8.5 A trip,
2.6 W TH SEMTIC 103AT
1 SW1 Switch, push button,
momentary, N.O. low profile TH Panasonic EVQPLHA15
1 TP1 Jack, test point, clr TH Farnell 240−333
1 U1 IC, bq29311pw 24TSSOP TI bq29311PW
1 U2 IC, Advanced Gas Gauge,
bq2083DBT 38TSSOP TI bq2083DBT
1 Y1 Crystal, 32.768 kHz,
7−12 pF capacitance SMT Epson or KDS FC2550000201 or ZE00019
1 −− PCB Any
Assembly Notes:
1) This assembly is ESD sensitive.
2) This assembly shall comply with IPC-A-610 class 2 or better.
3) This assembly must be clean of flux residues and contaminants.
4) Use of no-clean flux is not acceptable.

4-1
bq2083/bq29311 Circuit Module Performance Specification Summary
  ! $'#
"(' "##%
This section summarizes the performance specifications of the bq2083/
bq29311 Circuit Module. Table 4−1 gives the performance specifications of
the circuit.
Table 4−1.Performance Specification Summary
Specification Min Typ Max Units
Input Voltage Pack+ to Pack− 6.0 25 V
Charge and Discharge Current See
Note A
Note: Maximum currents are determined by the value of the sense resistor used and the short
circuit threshold setting of the bq29311
Chapter 4

4-2