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BQ20Z655EVM/BQ34Z651EVM Datasheet by Texas Instruments

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l TEXAS INSTRUMENTS
User's Guide
SLUU697November 2011
bq20z655EVM and bq34z651EVM SBS 1.1 Impedance
Track Technology-Enabled Evaluation Module
This evaluation module (EVM) is a complete evaluation system for the bq20z655/bq29412 and
bq34z651/bq29412 battery management system. The EVM includes one bq20z655/bq29412 or
bq34z651/bq29412 circuit module and a link to Windows®-based PC software. The circuit module includes
one bq20z655 or bq34z651 integrated circuit (IC), one bq29412 IC, and all other onboard components
necessary to monitor and predict capacity, perform cell balancing, monitor critical parameters, protect the
cells from overcharge, over-discharge, short-circuit, and over-current in 2-, 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
EV2300 or EV2400 interface board and software, the user can read the bq20z655 or bq34z651 data
registers, program the chipset for different pack configurations, log cycling data for further evaluation, and
evaluate the overall functionality of the solution under different charge and discharge conditions.
Contents
1 Features ...................................................................................................................... 2
2 bq20z655-Based and bq34z651-Based Circuit Module ............................................................... 2
3 bq20z655 and bq34z651 Circuit Module ................................................................................. 3
4 Circuit Module Physical Layouts and Bill of Materials .................................................................. 3
5 EVM Hardware and Software Setup ..................................................................................... 8
6 Troubleshooting Unexpected Dialog Boxes ............................................................................. 8
7 Hardware Connection ...................................................................................................... 8
8 Operation ..................................................................................................................... 9
9 Calibration Screen ......................................................................................................... 12
10 Pro (Advanced) Screen ................................................................................................... 13
11 Related Documentation from Texas Instruments ..................................................................... 14
List of Figures
1 bq20z655EVM and bq34z651EVM LayoutSilk Screen.............................................................. 4
2 Top Assembly ............................................................................................................... 4
3 Top Layer .................................................................................................................... 4
4 Bottom Layer ................................................................................................................ 4
5 Bottom Assembly ........................................................................................................... 5
6 Schematic.................................................................................................................... 7
7 bq20z655 and bq34z651 Circuit Module Connection to Cells and System Load/Charger........................ 9
8 SBS Data Screen.......................................................................................................... 10
9 Data Flash Screen, 1st Level Safety Class ............................................................................ 11
10 Calibration Screen......................................................................................................... 13
11 Pro (Advanced) Screen................................................................................................... 14
List of Tables
1 Ordering Information........................................................................................................ 2
2 Components and Flash-Memory Settings for Different Precharge Modes .......................................... 3
3 Bill of Materials .............................................................................................................. 5
4 Performance Specification Summary..................................................................................... 8
5 Circuit Module to EV2300 or EV2400 Connections .................................................................... 9
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Features
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1 Features
Complete evaluation system for the bq20z655 and bq34z651 SBS 1.1-compliant advanced gas gauges
with Impedance Tracktechnology and bq29412 independent overvoltage protection IC
Populated circuit module for quick setup
Software that allows data logging for system analysis
1.1 Kit Contents
bq20z655/bq29412 and bq34z651/bq29412 circuit module
Set of support documentation
1.2 Ordering Information
Table 1. Ordering Information
EVM Part Number Chemistry Configuration Capacity
bq34z651EVM Li-Ion 2-series, 3-series, or 4-series cell Any
bq20z655EVM Li-Ion 2-series, 3-series, or 4-series cell Any
2 bq20z655-Based and bq34z651-Based Circuit Module
The bq20z655/bq29412 and bq34z651/bq29412-based circuit module is a complete and compact example
solution of a bq20z655 and bq34z651 circuit for battery management and protection of Li-Ion or
Li-Polymer packs. The circuit module incorporates a bq20z655 and bq34z651 battery monitor IC, bq29412
independent overvoltage protection IC, and all other components necessary to accurately predict the
capacity of 2-series, 3-series, or 4-series cells.
2.1 Circuit Module Connections
Contacts on the circuit module provide the following connections:
Direct connection to the cells: 1N (BAT), 1P, 2P, 3P, 4P (BAT+)
To the serial communications port (SMBC, SMBD)
To the system load and charger connect across PACK+ and PACK
To the system-present pin (SYS PRES)
To the LED/LCD interface (LED(1:5), common) (LCD option only on the bq20z655)
To charge enable input (CE) (bq20z655 option only)
To the heater control port (HEATER CNTRL) (bq34z651 option only)
2.2 Pin Descriptions
Pin Name Description
1N 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
4P +ve connection of fourth (top) cell
CE Charge enable overrides firmware control when high
COMMON Output/open drain: LCD common connection
HEATER CNTRL (X3) Drain connection to n-channel FET
LED1 Output/open drain: LED 1 current sink. LCD segment 1
LED2 Output/open drain: LED 2 current sink. LCD segment 2
LED3 Output/open drain: LED 3 current sink. LCD segment 3
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l TEXAS INSTRUMENTS (SLUSAHB) (SLUSAL7)
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bq20z655 and bq34z651 Circuit Module
Pin Name Description
LED4 Output/open drain: LED 4 current sink. LCD segment 4
LED5 Output/open drain: LED 5 current sink. LCD segment 5
PACKPack negative terminal
PACK+ Pack positive terminal
SMBC Serial communication port clock
SMBD Serial communication data port
SYS PRES System present pin (if low, system is present)
VSS Pack negative terminal
3 bq20z655 and bq34z651 Circuit Module
This section contains information for modifying and choosing a precharge mode for bq20z655/bq29412
and bq34z651/bq29412 implementation.
3.1 Schematic
The schematic follows the bill of materials in this user's guide (Figure 6).
3.2 Modifications for Choosing Particular Precharge Mode
To charge, the charge FET (CHG-FET) must be turned on to create a current path. When the V(BAT) is 0 V
and CHG-FET = ON, the V(PACK) is as low as the battery voltage. In this case, the supply voltage for the
device is too low to operate. This function has three possible configurations, and the IC can be easily
configured according to the application needs. The three modes are 0-V Charge FET mode, Common
FET mode, and Precharge FET mode.
1. 0-V Charge FET modeDedicates a precharge current path using an additional FET (ZVCHG-FET) to
sustain the PACK+ voltage level.
2. Common FET modeDoes not use a dedicated precharge FET. The charge FET (CHG-FET) is set to
ON state as default.
3. Precharge FET modeDedicates a precharge current path using an additional open-drain (OD) pin
drive FET (PCHG-FET) to sustain the PACK+ voltage level.
To use a particular mode of charging with the EVM, add or remove some elements shown in Table 2, and
use the given settings of DF.Configuration, ZVCHG1, 0.
Table 2. Components and Flash-Memory Settings for Different Precharge Modes
Mode Resistors PRECHG FET ZVCHG1 ZVCHG0
1. 0-V Chg (default) R21, R28 Q3 0 0
2. Common FET R24 Q2 0 1
3. Precharge R23, R28 Q3 1 0
For more details about pre-charge operation and mode choices, see the bq20z655 datasheet (SLUSAH8)
and the bq34z651 datasheet (SLUSAL7).
3.3 Testing Fuse-Blowing Circuit
To prevent the loss of board functionality during the fuse-blowing test, the actual chemical fuse is not
provided in the circuit. FET Q1 drives TP2 low if a fuse-blow condition occurs; so, monitoring TP2 can be
used to test this condition. Fuse placement on the application board is shown in the bq20z655 and
bq34z651 datasheet reference-board schematics.
4 Circuit Module Physical Layouts and Bill of Materials
This section contains the printed-circuit board (PCB) layout, bill of materials, and assembly drawings for
the bq20z655/bq29412 and bq34z651/bq29412 circuit module.
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75.0 mm
SMBD
SMBC
PWR084 Rev. B VSS
12.0 mm
PACK +
RT1
GND
COMMONLED2LED4
HEATER CNTRL
1P
PACK -CE
PRES
SYS
LED1LED3LED5
FUSE
RT2
4P
3P
2P
1N
TB7
TB1
TB5 TB6
2.5V
1
1
1
C1
C3
C4
C27
C23
C17
C25
C20
C2
C6
C19
C18
C26
C28
C14
D1
D11
D2
D4
D10
D8
D9
Q6
R1
R15
R22
R10
R18
R16
R28
R31
R25
R24
R40
R8
R2
R32
R4
R29
R42
R35
R30
RT1
TB3
TB7
TB6
TP1
SW1
D3
D6
D7
RT2
Q4
R7
C29
J1
TP2
TB1 TB2
T 4B
TB5
U1
Circuit Module Physical Layouts and Bill of Materials
www.ti.com
4.1 Board Layout
This section shows the dimensions, PCB layers (Figure 1 through Figure 5), and assembly drawings for
the bq20z655 and bq34z651 modules.
Figure 1. bq20z655EVM and bq34z651EVM LayoutSilk Screen
Figure 2. Top Assembly
Figure 3. Top Layer
Figure 4. Bottom Layer
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DDEHJHLUJDEB
1
1
1
C7
C24
C13
C12
C8
C9
C22
C15
C11
C5
C16
D5
Q1
Q5
R23
R21R6
R27
R20
R41
R12
R13
R37
R39
R9R5
R19
R14
R26
R3
R38
R36
R34
R33
R11
U2
Q3
Q2
R17
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Circuit Module Physical Layouts and Bill of Materials
Figure 5. Bottom Assembly
4.2 Bill of Materials and Schematic
Table 3. Bill of Materials
Count Reference Design Description Size MFR Part Number
C1, C2, C3, C4, C5, C6,
C7, C8, C9, C12, C13, Capacitor, Ceramic, 50 V, X7R,
21 0603 Any STD
C15, C16, C17, C18, C20, 20%
C23, C24, C26, C27, C28
Capacitor, Ceramic, 25 V, X7R,
3 C10, C14, C21 0805 Any STD
20%
Capacitor, Ceramic, 25 V, X7R,
1 C11 0603 Any STD
20%
Capacitor, Ceramic, 10 V, X7R,
1 C19 0603 Any STD
20%
Capacitor, Ceramic, 16 V, X7R,
2 C22, C25 0603 Any STD
20%
Capacitor, Ceramic, 16 V, X7R,
1 C29 0603 Any STD
20%
Diode, Switching, 150 mA,
4 D1, D2, D3, D11 SOT23 Fairchild BAS16
75 V, 350 mW
Diode, Dual, Zener, 5.6 V,
2 D4, D5 SOT23 Diodes AZ23C5V6-7-F
300 mW
Diode, LED, Green, Gullwing, 0.120 x 0.087
5 D6, D7, D8, D9, D10 Panasonic LN1361C
GW Type, 20 ma, 7.5 mcd typ. inch
Header, Friction Lock Ass'y, 0.400 x 0.500
1 J1 Molex 22-05-3041
4-pin Right Angle inch
MOSFET, N-Ch, 20 V, 1.3 A,
1 Q1 SOT-23 Fairchild NDS331N
210 mΩ
MOSFET, NChan 30 V, 15 A ,
3 Q2, Q4, Q6 SO8 Fairchild FDS8817NZ
7 mΩ
MOSFET, Pch, 30 V, -8.8 A,
1 Q3 SO8 Fairchild FDS4435BZ
20 mΩ
MOSFET, N-Ch, 50 V, 0.22 A,
1 Q5 SOT23 Fairchild BSS138
3.5 Ω
R1, R2, R3, R4, R5, R12,
12 R13, R32, R33, R34, R38, Resistor, Chip, 1/16 W, 5% 0603 Any STD
R39
Resistor, Chip, 1 W, 1%, 75
1 R11 2512 Vishay WSl2512R0100FEA
ppm
4 R14, R19, R21, R22 Resistor, Chip, 1/16 W, 5% 0603 Any STD
3 R15, R16, R40 Resistor, Chip, 1/16 W, 5% 0603 Any STD
1 R17 Resistor, Chip, 1 W, 5% 2512 Any STD
2 R18, R27 Resistor, Chip, 1/16 W, 1% 0603 Any STD
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Table 3. Bill of Materials (continued)
Count Reference Design Description Size MFR Part Number
4 R20, R36, R37, R41 Resistor, Chip, 1/16 W, 5% 0603 Any STD
3 R23, R28, R24 Resistor, Chip, 1/16 W, 5% 0603 Any STD
2 R25, R29 Resistor, Chip, 1/16 W, 1% 0603 Any STD
2 R26, R30 Resistor, Chip, 1/16 W, 1% 0603 Any STD
R6, R7, R8, R9, R10, R31,
8 Resistor, Chip, 1/16 W, 5% 0603 Any STD
R35, R42
0.095 X 0.150
2 RT1, RT2 Thermistor, NTC, 3-A Semitec 103AT-2
inch
Switch, Push button, 0.200 x 0.200
1 SW1 Panasonic EVQ-PLHA15
Momentary, N.O. Low Profile inch
Terminal Block, 2-pin, 6-A, 3.5
2 TB1, TB4 0.27 x 0.25 OST ED555/2DS
mm
Terminal Block, 3-pin, 6-A, 3.5
5 TB2, TB3, TB5, TB6, TB7 0.41 x 0.25 OST ED555/3DS
mm
Test Point, Black, Thru Hole 0.100 x 0.100
1 TP1 Keystone 5001
Color Keyed inch
Test Point, White, Thru Hole 0.100 x 0.100
1 TP2 Keystone 5002
Color Keyed inch
IC, Voltage Protection for 2, 3,
1 U1 4 Cell Lion , 2nd Protection, SSOP-08 TI bq29412DCT
4.45 V OVP
IC, Cool-GG Programmable bq34z651DBT or
1 U2 TSSOP30 TI
Battery Management bq20z655DBT-R1
PCB, 3.94-inch x 1.18-inch x
1 Any PWR084
0.062
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*9 TEXAS INSTRUMENTS mm :3me axles L 3:. 2.19:; 5.5.3.53 E .3; 5:53:55. :2: ®
VSS
VSS
HEATER_CNTL
PACK+
2P
1P
1N
3P
4P
PACK -
SMBD
Pack voltage range
Pack+ to Pack-
6V - 25V
SMBC
SYS PRES
Typical
cell
voltage
3V to
4.2V per
cell
Maximum output current 7A continuous
C1
0.1uF
C2
0.1uF
TP2
2.5V Vcc
C4
0.1uF
R10 1K
R8 1K
R7 1K
R13
100
C12 0.1uF
C13
0.1uF
C16
0.1uF
C18
0.1uF
C15
0.1uF
C28 0.1uF
SW1
D11
BAS16
R20
1M
R25
8.45K
R41
1M
R36
1M
R37
1M
R16
220K
D2 BAS16
TP3
FUSE
1
2
TB4
1
2
3
TB7
R1
100
R2
100
R4
100
R9 1K
R6 1K
C19
4.7uF
R12
100
R18
3.01M
R19
5.1K
R26
61.9K
C23 0.1uF
R27
3.01M
R22
5.1K
C25
0.47uF
RT1
10K
RT2
10K
R31
1K
R32
100
D3 BAS16
C26
0.1uF
C27
0.1uF
GND SIDE
G4
1
2
3
TB5
1
2
3
TB6
1
2
3
TB3
1
2
3
4
J1
TP1
GND
C3
0.1uF
C5
0.1uF
1
2
3
TB2
D9 GREEN
D8 GREEN
C14 1.0uF
C10
1.0uF
D1 BAS16
C8
0.1uF
C11
0.22uF
C6
0.1uF
R40
220K
C20 0.1uF
R21 5.1K
R28 100K
C21
1.0uF
Q2
FDS8817NZ
Q4
FDS8817NZ
R29
8.45K
D5
5.6V
R33 100 R38 100
GND SIDE G2
GND SIDE G3
C29
0.22uF
C17
0.1uF
R23
100K
R14
5.1K
R15
220K
R35
1K
R24 100K
R3
100
R5
100
1
2
TB1
D10 GREEN
D6 GREEN
D7 GREEN
1
OUT
2
VDD
3
CD
4
VD4
5GND
6VC3
7VC2
8VC1
U1
BQ29412DCT
C7
0.1uF
C9
0.1uF
C22
0.47uF
C24 0.1uF
R17
300
1W
Q3
FDS4435BZ
R30
61.9K
R34 100 R39 100
Q6
FDS8817NZ
GND SIDE
G1
D4
5.6V
R42 1K
R11
.010 ohm
Q1
NDS331N
Q5
BSS138
1
DSG
2
PACK
3
VCC
4
ZVCHG
5
GPOD
6
PMS
7
VSS
8
LEDOUT
9
TOUT
10
VCELL+
11
ALERT
12
NC
13
TS1
14
TS2
15
PRES
16
PFIN
17
SAFE
18
SMBD
19
NC
20
SMBC
21
DISP
22
VSS
23 LED1
24 LED2
25 LED3
26 LED4
27 LED5
28 GSRP
29 GSRN
30 MRST
31 VSS
32 REG
33 RBI
34 VSS
35 RESET
36 ASRN
37 ASRP
38 VC5
39 VC4
40 VC3
41 VC2
42 VC1
43 BAT
44 CHG
U2
BQ20Z655DBT / BQ34Z651DBT (Note 1)
CE
2_5V
LED5 LED4 LED1LED2LED3
CE
LED1
COMMON
LED3
2_5V
LED4
COMMON
2_5V
LED2
2_5V LED5
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Circuit Module Physical Layouts and Bill of Materials
Figure 6. Schematic
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EVM Hardware and Software Setup
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4.3 bq20z655/bq29412 and bq34z651/bq29412 Circuit Module Performance Specification
Summary
This section summarizes the performance specifications of the bq20z655/bq29412 and
bq34z651/bq29412 circuit module.
Table 4. Performance Specification Summary
Specification Minimum Typical Maximum Units
Input voltage Pack+ to Pack6 15 25 V
Charge and discharge current 0 2 7 A
5 EVM Hardware and Software Setup
This section describes how to install the bq20z655 and bq34z651 PC software and how to connect the
different components of the EVM.
5.1 System Requirements
The bq20z655EVSW or bq34z651EVSW software requires Windows®XP or later.
5.2 Software Installation
Find the latest software version in the bq20z655 and bq34z651 tool folder on power.ti.com. Use the
following steps to install the bq20z655EVSW or bq34z651EVSW software:
1. Copy the files from the TI website into a temporary directory you select, double-click on
bqEV-EASYSetup00.09.xx.exe, where xx indicates the version, and follow the installer instructions to
complete the EVSW installation.
2. If the EV2300 or EV2400 was not previously installed, after the EVSW installation, a TI USB DRIVER
INSTALLER pops up. Click Yes for the agreement message and follow its instructions. Two drivers are
associated with the EV2300 or EV2400. Follow the instructions to install both. Do not reboot the
computer, even if asked to do so.
3. Plug the EV2300 or EV2400 into a USB port. The Windows system may show a prompt that new
hardware has been found. When asked, Can Windows connect to Windows Update to search for
software?, select No, not this time and click NEXT. In the next dialog window, it indicates This wizard
helps you install software for: TI USB Firmware Updater, select Install the software automatically
(Recommended) and click NEXT. It is common for the next screen to be the Confirm File Replace
screen. Click No to continue. If this screen does not appear, then go to the next step. After Windows
indicates that the installation is completed, a similar dialog window pops up to install the second driver;
proceed with the same installation preference as the first one. The second driver is TI USB bq80xx
Driver.
6 Troubleshooting Unexpected Dialog Boxes
The following actions can help the user to avoid unexpected dialog boxes.
Ensure that the files were extracted from the zip file using the Preserve Folder names option.
Ensure that all the files were extracted from the zip file.
The user that is downloading the files must be logged in as the administrator.
The driver is not signed, so the administrator must allow installation of unsigned drivers in the
operating system policy.
7 Hardware Connection
The bq20z655EVM and bq34z651EVM comprises three hardware components: the bq20z655/bq29412 or
bq34z651/bq29412 circuit module, the EV2300 or EV2400 PC interface board, and the PC.
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-
EV2300
SMBD
SMBC
VSS
SMBD
SMBC
VSS
J1
-
LOAD / CHARGER
PACK+
SYS PRES
PAC
K
+
75.0 mm
SMBD
SMBC
PWR084 Rev. B VSS
12.0 mm
PACK +
RT1
GND
COMMONLED2LED4
HEATER CNTRL
1P
PACK –CE
PRES
SYS
LED1LED3LED5
FUSE
RT2
4P
3P
2P
1N
TB7
TB1
TB5 TB6
2.5V
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Operation
7.1 Connecting bq20z655/bq29412 and bq34z651/bq29412 Circuit Module to the Battery
Pack
Figure 7 shows how to connect the bq20z655/bq29412 and bq34z651/bq29412 circuit module to the cells
and system load/charger.
The cells must be connected in the following order:
1. 4-Cell Pack: 1N (BAT), 1P, 2P, 3P, and 4P (see Section 2.1 for definitions).
2. 3-Cell Pack: 1N (BAT), 1P, 2P, and then connect 4P and 3P together.
3. 2-Cell Pack: 1N (BAT), 1P, and then connect 4P, 3P, and 2P together
To start charge or discharge test, connect PRES pin to PACKpin to set SYS PRES state. To test sleep
mode, disconnect the SYS PRES pin.
Figure 7. bq20z655 and bq34z651 Circuit Module Connection to Cells and System Load/Charger
7.2 PC Interface Connection
The following steps configure the hardware for interface to the PC:
1. Connect the bq20z655-based and bq34z651-based smart battery to the EV2300 or EV2400 using wire
leads as shown in Table 5.
Table 5. Circuit Module to EV2300 or EV2400 Connections
bq20z655-Based and bq34z651-Based Battery EV2300 or EV2400
SMBD SMBD
SMBC SMBC
VSS GND
2. Connect the PC USB cable to the EV2300 or EV2400 and the PC USB port.
The bq20z655EVM and bq34z651EVM is now set up for operation.
8 Operation
This section details the operation of the bq20z655 and bq34z651 EVSW software.
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Operation
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8.1 Starting the Program
Run bq Evaluation Software from the Start |Programs |Texas Instruments |bq20z655 (or bq34z651)
EVSW menu sequence. The SBS Data screen (Figure 8) appears. Data begins to appear once the
Refresh (single time scan) button is clicked, or when the Keep Scanning check box is checked. To
disable the scan feature, deselect Keep Scanning.
The continuous scanning period can be set via the | Options | and | Set Scan Interval | menu selections.
The range for this interval is 0 ms to 65535 ms. Only items that are selected for scanning are scanned
within this period.
The bq Evaluation Software provides a logging function that logs the values that were last scanned by
EVSW. To enable this function, select the Start Logging button; this causes the Keep Scanning button
to be selected. When logging is Stopped, the Keep Scanning button is still selected and has to be
manually unchecked.
The logging intervals are specified under the | Options | menu with the maximum value of 65535 ms. The
Log interval cannot be smaller than the scan interval because this results in the same value being logged
at least twice.
Figure 8. SBS Data Screen
10 bq20z655EVM and bq34z651EVM SBS 1.1 Impedance Track SLUU697November 2011
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Operation
This screen (Figure 8) shows the SBS data set along with additional ManufacturersAccess() command
information such as individual cell measurements. Additional Flag and Static data can be viewed by
selecting the appropriate tab at the bottom of the SBS Data screen.
Data such as SBS.ManufacturerName() is static and does not change. This data is viewed separately
using the Static Data tab available at the bottom of the screen.
Dragging the splitter bar (line that separates the Flags/Static data from SBS values) changes the height of
the Flags/Static Data display. Selecting | View |, then | Auto Arrange | returns the splitter bar to its
original location.
8.2 Setting Programmable bq20z655 and bq34z651 Options
The bq20z655 and bq34z651 data flash comes configured per the default settings detailed in the
bq20z655 and bq34z651 datasheet. Ensure that the settings are correctly changed to match the pack and
application for the bq20z655 and bq34z651 solution being evaluated.
IMPORTANT: The correct setting of these options is essential to get the best performance.
The settings can be configured using the Data Flash Constants screen (Figure 9).
Figure 9. Data Flash Screen, 1st Level Safety Class
To read all the data from the bq20z655 and bq34z651 data flash, click on menu option | Data Flash |
Read All |.
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Calibration Screen
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To write to a data flash location, click on the desired location, enter the data and press Enter, which writes
the entire tab of flash data, or select menu option | Data Flash |Write All |. The data flash must be read
before any writes are performed to avoid any incorrect data being written to the device.
The | File |Special Export | menu option allows the data flash to be exported, but it configures the
exported data flash to a learned state ready for mass production use.
The data flash configuration can be saved to a file by selecting | File |Export | and entering a file name. A
data flash file also can be retrieved in this way, imported, and written to the bq20z655 and bq34z651
using the | Write All | button.
The configuration information of the bq20z655 and bq34z651 and module calibration data also is held in
the bq20z655 and bq34z651 data flash.
The bq20z655 and bq34z651 allows for an automatic data flash export function, similar to the SBS Data
logging function. This feature, when selected via | Options |Auto Export |, exports Data Flash to a
sequential series of files named as FilenameNNNNN.gg where N = a decimal number from 0 to 9.
The AutoExport interval is set under the | Options menu | with a minimum value of 15 s. The AutoExport
filename also is set under the | Options menu |.
When a checkmark is next to | AutoExport |, the AutoExport is in progress. The same menu selection is
used to turn on/off AutoExport.
If the data flash screen is blank, then the bq20z655 and bq34z651 that is being used may not be
supported by the bqEVSW version that is being used. An upgrade may be required.
9 Calibration Screen
9.1 How to Calibrate
The bq20z655 and bq34z651 must be calibrated using power supplies or a power supply and cell
simulation resistors (200 to 1000 each) before cells are attached. Before the bq20z655 and bq34z651
are calibrated:
Connect and measure a 2-A current source from 1N () and PACK(+) to calibrate without using the
FETs. (Calibration using the FETs is not recommended.)
Measure the pack voltage from Batt+ to Batt(total of cell voltages).
Measure the temperature of the pack.
These steps may not be required, depending on the type of calibration being performed.
9.2 To Calibrate the bq20z655 and bq34z651
To calibrate the bq20z655 and bq34z651, perform the following steps.
1. Select the types of calibration to be performed (see Figure 10).
2. Enter the measured values for the types selected (except for CC Offset Calibration).
3. If Voltage Calibration is selected, then enter the number of cells on the pack.
4. If Temperature Calibration is selected, then select the sensor that is to be calibrated.
5. If the current source is connected between 1N and PACK, then select the Off (bypassed) check box
in the FET Control section.
6. Press the Calibrate Part button.
9.3 Board Offset Calibration
To perform the offset calibration for the current offset of the board, do these steps:
1. Remove load/external voltage and short PACKto Batt.
2. Press the CC Board Offset Calibration button.
12 bq20z655EVM and bq34z651EVM SBS 1.1 Impedance Track SLUU697November 2011
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Pro (Advanced) Screen
9.4 Pack Voltage Calibration
To calibrate the voltage at the AFE Pack pin, follow these steps:
1. Ensure that Voltage Calibration has been performed for the pack. Ensure that a stable charger voltage
higher than 8-V is present at Pack+.
2. Press the Pack Voltage button to calibrate.
Figure 10. Calibration Screen
10 Pro (Advanced) Screen
10.1 SMB Communication
The set of read/write operations over SMBus are not specific to any gas gauge. These are provided as
general-purpose communication tools (Figure 11).
10.2 Hexadecimal/Decimal Converter
These two boxes convert between Hexadecimal value and Decimal value as soon as values are typed into
the boxes. Invalid values may cause erroneous results.
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SLUU697November 2011 bq20z655EVM and bq34z651EVM SBS 1.1 Impedance Track
Technology-Enabled Evaluation Module
Submit Documentation Feedback Copyright ©2011, Texas Instruments Incorporated
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Related Documentation from Texas Instruments
www.ti.com
When scaling converted hexadecimal values to a higher number of bytes, follow these rules:
When Unsigned is selected, the left pad contains zeroes.
When Signed is selected, the left pad contains zeroes for a positive number, or the left pad contains F
for negative numbers.
10.3 Programming
This screen allows device reprogramming from unencrypted and encrypted files.
Figure 11. Pro (Advanced) Screen
11 Related Documentation from Texas Instruments
1. bq20z655 SBS 1.1-Compliant Gas Gauge and Protection Enabled with Impedance TrackDatasheet
(SLUSAH8)
2. bq20z655 Technical Reference Manual (SLUU493)
3. bq20z655 SBS 1.1-Compliant Gas Gauge and Protection Enabled with Impedance Trackand
External Battery Heater Control Datasheet (SLUSAL7)
4. Quick-Start Guide for bq20zxx Family Gas Gauge Application Report (SLUA421A)
14 bq20z655EVM and bq34z651EVM SBS 1.1 Impedance Track SLUU697November 2011
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l TEXAS INSTRUMENTS (SLUU446A1 (SLUU278)
www.ti.com
Related Documentation from Texas Instruments
5. EV2400 Evaluation Module Interface Board User's Guide (SLUU446A)
6. bqEasyUser's Guide (SLUU278)
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Submit Documentation Feedback Copyright ©2011, Texas Instruments Incorporated
EVALUATION BOARD/KIT/MODULE (EVM) ADDITIONAL TERMS
Texas Instruments (TI) provides the enclosed Evaluation Board/Kit/Module (EVM) under the following conditions:
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.
Should this evaluation board/kit not meet the specifications indicated in the User’s Guide, the board/kit may be returned within 30 days from
the date of delivery for a full refund. THE FOREGOING LIMITED 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. 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.
Please read the User's Guide and, specifically, the Warnings and Restrictions notice in the User's Guide prior to handling the product. This
notice contains important safety information about temperatures and voltages. For additional information on TI's environmental and/or safety
programs, please visit www.ti.com/esh or contact TI.
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. 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.
REGULATORY COMPLIANCE INFORMATION
As noted in the EVM User’s Guide and/or EVM itself, this EVM and/or accompanying hardware may or may not be subject to the Federal
Communications Commission (FCC) and Industry Canada (IC) rules.
For EVMs not subject to the above rules, this evaluation board/kit/module is intended for use for ENGINEERING DEVELOPMENT,
DEMONSTRATION OR EVALUATION PURPOSES ONLY and is not considered by TI to be a finished end product fit for general consumer
use. It generates, uses, and can radiate radio frequency energy and has not been tested for compliance with the limits of computing
devices pursuant to part 15 of FCC or ICES-003 rules, which are designed to provide reasonable protection against radio frequency
interference. Operation of the equipment 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.
General Statement for EVMs including a radio
User Power/Frequency Use Obligations: This radio is intended for development/professional use only in legally allocated frequency and
power limits. Any use of radio frequencies and/or power availability of this EVM and its development application(s) must comply with local
laws governing radio spectrum allocation and power limits for this evaluation module. It is the user’s sole responsibility to only operate this
radio in legally acceptable frequency space and within legally mandated power limitations. Any exceptions to this are strictly prohibited and
unauthorized by Texas Instruments unless user has obtained appropriate experimental/development licenses from local regulatory
authorities, which is responsibility of user including its acceptable authorization.
For EVMs annotated as FCC – FEDERAL COMMUNICATIONS COMMISSION Part 15 Compliant
Caution
This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause
harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the
equipment.
FCC Interference Statement for Class A EVM devices
This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC Rules.
These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial
environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the
instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to
cause harmful interference in which case the user will be required to correct the interference at his own expense.
FCC Interference Statement for Class B EVM devices
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules.
These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment
generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause
harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If
this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and
on, the user is encouraged to try to correct the interference by one or more of the following measures:
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and receiver.
Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
Consult the dealer or an experienced radio/TV technician for help.
For EVMs annotated as IC – INDUSTRY CANADA Compliant
This Class A or B digital apparatus complies with Canadian ICES-003.
Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the
equipment.
Concerning EVMs including radio transmitters
This device complies with Industry Canada licence-exempt RSS standard(s). Operation is subject to the following two conditions: (1) this
device may not cause interference, and (2) this device must accept any interference, including interference that may cause undesired
operation of the device.
Concerning EVMs including detachable antennas
Under Industry Canada regulations, this radio transmitter may only operate using an antenna of a type and maximum (or lesser) gain
approved for the transmitter by Industry Canada. To reduce potential radio interference to other users, the antenna type and its gain should
be so chosen that the equivalent isotropically radiated power (e.i.r.p.) is not more than that necessary for successful communication.
This radio transmitter has been approved by Industry Canada to operate with the antenna types listed in the user guide with the maximum
permissible gain and required antenna impedance for each antenna type indicated. Antenna types not included in this list, having a gain
greater than the maximum gain indicated for that type, are strictly prohibited for use with this device.
Cet appareil numérique de la classe A ou B est conforme à la norme NMB-003 du Canada.
Les changements ou les modifications pas expressément approuvés par la partie responsable de la conformité ont pu vider l’autorité de
l'utilisateur pour actionner l'équipement.
Concernant les EVMs avec appareils radio
Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de licence. L'exploitation est
autorisée aux deux conditions suivantes : (1) l'appareil ne doit pas produire de brouillage, et (2) l'utilisateur de l'appareil doit accepter tout
brouillage radioélectrique subi, même si le brouillage est susceptible d'en compromettre le fonctionnement.
Concernant les EVMs avec antennes détachables
Conformément à la réglementation d'Industrie Canada, le présent émetteur radio peut fonctionner avec une antenne d'un type et d'un gain
maximal (ou inférieur) approuvé pour l'émetteur par Industrie Canada. Dans le but de réduire les risques de brouillage radioélectrique à
l'intention des autres utilisateurs, il faut choisir le type d'antenne et son gain de sorte que la puissance isotrope rayonnée équivalente
(p.i.r.e.) ne dépasse pas l'intensité nécessaire à l'établissement d'une communication satisfaisante.
Le présent émetteur radio a été approuvé par Industrie Canada pour fonctionner avec les types d'antenne énumérés dans le manuel
d’usage et ayant un gain admissible maximal et l'impédance requise pour chaque type d'antenne. Les types d'antenne non inclus dans
cette liste, ou dont le gain est supérieur au gain maximal indiqué, sont strictement interdits pour l'exploitation de l'émetteur.
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Important Notice for Users of this Product in Japan
This development kit is NOT certified as Confirming to Technical Regulations of Radio Law of Japan
If you use this product in Japan, you are required by Radio Law of Japan to follow the instructions below with respect to this product:
1. Use this product in a shielded room or any other test facility as defined in the notification #173 issued by Ministry of Internal Affairs and
Communications on March 28, 2006, based on Sub-section 1.1 of Article 6 of the Ministry’s Rule for Enforcement of Radio Law of
Japan,
2. Use this product only after you obtained the license of Test Radio Station as provided in Radio Law of Japan with respect to this
product, or
3. Use of this product only after you obtained the Technical Regulations Conformity Certification as provided in Radio Law of Japan with
respect to this product. Also, please do not transfer this product, unless you give the same notice above to the transferee. Please note
that if you could not follow the instructions above, you will be subject to penalties of Radio Law of Japan.
Texas Instruments Japan Limited
(address) 24-1, Nishi-Shinjuku 6 chome, Shinjuku-ku, Tokyo, Japan
http://www.tij.co.jp
【ご使用にあたっての注】
本開発キットは技術基準適合証明を受けておりません。
本製品のご使用に際しては、電波法遵守のため、以下のいずれかの措置を取っていただく必要がありますのでご注意ください。
1. 電波法施行規則第6条第1項第1号に基づく平成18328日総務省告示第173号で定められた電波暗室等の試験設備でご使用いただく。
2. 実験局の免許を取得後ご使用いただく。
3. 技術基準適合証明を取得後ご使用いただく。
なお、本製品は、上記の「ご使用にあたっての注意」を譲渡先、移転先に通知しない限り、譲渡、移転できないものとします。
   上記を遵守頂けない場合は、電波法の罰則が適用される可能性があることをご留意ください。
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EVALUATION BOARD/KIT/MODULE (EVM)
WARNINGS, RESTRICTIONS AND DISCLAIMERS
For Feasibility Evaluation Only, in Laboratory/Development Environments. Unless otherwise indicated, this EVM is not a finished
electrical equipment and not intended for consumer use. It is intended solely for use for preliminary feasibility evaluation in
laboratory/development environments by technically qualified electronics experts who are familiar with the dangers and application risks
associated with handling electrical mechanical components, systems and subsystems. It should not be used as all or part of a finished end
product.
Your Sole Responsibility and Risk. You acknowledge, represent and agree that:
1. You have unique knowledge concerning Federal, State and local regulatory requirements (including but not limited to Food and Drug
Administration regulations, if applicable) which relate to your products and which relate to your use (and/or that of your employees,
affiliates, contractors or designees) of the EVM for evaluation, testing and other purposes.
2. You have full and exclusive responsibility to assure the safety and compliance of your products with all such laws and other applicable
regulatory requirements, and also to assure the safety of any activities to be conducted by you and/or your employees, affiliates,
contractors or designees, using the EVM. Further, you are responsible to assure that any interfaces (electronic and/or mechanical)
between the EVM and any human body are designed with suitable isolation and means to safely limit accessible leakage currents to
minimize the risk of electrical shock hazard.
3. You will employ reasonable safeguards to ensure that your use of the EVM will not result in any property damage, injury or death, even
if the EVM should fail to perform as described or expected.
4. You will take care of proper disposal and recycling of the EVM’s electronic components and packing materials.
Certain Instructions. It is important to operate this EVM within TI’s recommended specifications and environmental considerations per the
user guidelines. Exceeding the specified EVM ratings (including but not limited to input and output voltage, current, power, and
environmental ranges) may cause property damage, personal injury or death. If there are questions concerning these ratings please contact
a TI field representative prior to connecting interface electronics including input power and intended loads. Any loads applied outside of the
specified output range may result in unintended and/or inaccurate operation and/or possible permanent damage to the EVM and/or
interface electronics. 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 as long as the input and output are maintained at a normal ambient operating temperature. These components include
but are not limited to linear regulators, switching transistors, pass transistors, and current sense resistors which can be identified using the
EVM schematic located in the EVM User's Guide. When placing measurement probes near these devices during normal operation, please
be aware that these devices may be very warm to the touch. As with all electronic evaluation tools, only qualified personnel knowledgeable
in electronic measurement and diagnostics normally found in development environments should use these EVMs.
Agreement to Defend, Indemnify and Hold Harmless. You agree to defend, indemnify and hold TI, its licensors and their representatives
harmless from and against any and all claims, damages, losses, expenses, costs and liabilities (collectively, "Claims") arising out of or in
connection with any use of the EVM that is not in accordance with the terms of the agreement. This obligation shall apply whether Claims
arise under law of tort or contract or any other legal theory, and even if the EVM fails to perform as described or expected.
Safety-Critical or Life-Critical Applications. If you intend to evaluate the components for possible use in safety critical applications (such
as life support) where a failure of the TI product would reasonably be expected to cause severe personal injury or death, such as devices
which are classified as FDA Class III or similar classification, then you must specifically notify TI of such intent and enter into a separate
Assurance and Indemnity Agreement.
Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265
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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
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TI warrants performance of its components to the specifications applicable at the time of sale, in accordance with the warranty in TI’s terms
and conditions of sale of semiconductor products. Testing and other quality control techniques are used to the extent TI deems necessary
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