User's Guide
SLUUAZ3 – March 2014
bq29700 Single-cell Li-Ion Protector EVM
The bq29700 EVM is a complete evaluation system for the bq297xy family of second-level protectors. The
EVM includes one bq29700-based circuit module.
1
2
3
4
5
Contents
Features .......................................................................................................................
bq29700-Based Circuit Module ............................................................................................
bq29700 Circuit Module Schematic .......................................................................................
Circuit Module Physical Layouts and Bill of Materials ..................................................................
EVM Hardware and Software Setup ......................................................................................
1
2
2
3
4
List of Figures
1
2
3
4
5
.........................................................................................................
Top Assembly ................................................................................................................
Top Layer ....................................................................................................................
Bottom Layer .................................................................................................................
bq29700 Circuit Module Connection to Cell and System Load/Charger .............................................
bq29700 Schematic
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3
3
3
5
List of Tables
1
2
1
1
4
Features
•
•
1.1
........................................................................................................
Bill of Materials ...............................................................................................................
Ordering Information
bq29700-based circuit module
Link to support documentation
Ordering Information
Table 1. Ordering Information
EVM Part Number
Chemistry
Configuration
Capacity
bq29700EVM-610
Li-Ion
1-Series Cell
Any
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1
bq29700-Based Circuit Module
2
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bq29700-Based Circuit Module
The bq29700-based circuit module is a complete and compact example solution of a bq29700 battery
protection IC. The circuit module includes one bq29700 IC, charge and discharge FETs, and all other
onboard components necessary to use and interface with the protector. The circuit module connects
directly across the battery.
2.1
Circuit Module Connections
Contacts on the circuit module provide the following connections:
• Direct connection to the cell: Cell+, Cell–
• The system load and charger connect across Pack+ and Pack–
2.2
3
Pin Descriptions
PIN NAME
DESCRIPTION
Cell–
Cell negative terminal
Cell+
Cell positive terminal
Pack–
Load or charger negative terminal
Pack+
Load or charger positive terminal
bq29700 Circuit Module Schematic
This section contains information on the schematic for the bq29700 implementation.
R1
330
TP1 TP2
Cell+ Cell -
TP6
V-
Max Vin = 6V
TP3
Pack-
U1
J1
Cell+
Cell-
6
1
2
5
4
VBAT
VSS
NC
COUT
DOUT
Max Iin = 5A
1
J2
2
2
1
3
Pack+
Pack-
bq29700DSE
Net-Tie
GND
GND
TP4
DOUT
R2
2.2K
TP5
COUT
C1
0.1µF
R3
5.1M
4,7
R4
5.1M
1,2,
5,6,8
Q1
1,2,
mid 5,6,8
4,7
Q2
Figure 1. bq29700 Schematic
3.1
Charge and Discharge FETs
The bq29700 protector has the capability to control low-side charge and discharge FETs. These FETs
have been included on the EVM board module. Test points TP4 and TP5 have been provided to allow for
easy gate-to-source measurements.
NOTE: TP4 and TP6 test points are swapped on the A version of the EVM silk screen. TP4 should
be DOUT and TP6 should be V–.
2
bq29700 Single-cell Li-Ion Protector EVM
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4
Circuit Module Physical Layouts and Bill of Materials
Circuit Module Physical Layouts and Bill of Materials
This section contains the board layout, bill of materials, and assembly drawings for the bq29700 circuit
module.
4.1
Board Layout
This section shows the dimensions, PCB layers, and assembly drawing for the bq29700 module.
Figure 2. Top Assembly
Figure 3. Top Layer
Figure 4. Bottom Layer
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Circuit Module Physical Layouts and Bill of Materials
4.2
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Bill of Materials
Table 2. Bill of Materials
4.3
Designator
Quantity
PCB1
1
C1
1
J1, J2
2
Q1, Q2
2
R1
1
R2
Value
Description
Package
Reference
Printed Circuit Board
Part Number
Manufacturer
PWR610
Any
0603
GRM188R71H104KA93D
MuRata
Terminal Block, 6A, 3.5mm
Pitch, 2-Pos, TH
7.0 x 8.2 x
6.5 mm
ED555/2DS
On-Shore
Technology
25 V
MOSFET, N-CH, 25V, 5A,
SON 2x2 mm
SON 2x2 mm CSD16301Q2
Texas
Instruments
330
RES, 330 ohm, 5%,
0.063W, 0402
0402
CRCW0402330RJNED
Vishay-Dale
1
2.2 kΩ RES, 2.2 kohm, 5%, 1/16W, 0402
0402
CRCW04022K20JNED
Vishay Dale
R3, R4
2
5.1 MΩ RES, 5.1 Mohm, 5%,
1/16W, 0402
RC1005J515CS
Samsung
Electromechanics
TP1
1
Red
Test Point, Miniature, Red,
TH
TP2, TP3,
TP4, TP5,
TP6
5
Black
Test Point, Miniature, Black, Black
TH
Miniature
Test point
5001
Keystone
U1
1
Li-Ion/Li Polymer Battery
Protection IC, DSE0006A
bq29700DSE
Texas
Instruments
0.1 µF CAP, CERM, 0.1µF, 50V,
±10%, X7R, 0603
0402
Red Miniature 5000
Test point
DSE0006A
Keystone
bq29700 Circuit Module Performance Specification Summary
This section summarizes the performance specifications of the bq29700 circuit module.
Performance Specification Summary
5
Specification
Min
Typ
Max
Unit
Input voltage Pack+ to Pack–
0
4
6
V
Charge and discharge current
0
1
5
A
EVM Hardware and Software Setup
This section describes how to connect the different components of the bq29700 EVM. Figure 5 shows how
to connect the bq29700 circuit module to the cell and system load or charger.
4
bq29700 Single-cell Li-Ion Protector EVM
Copyright © 2014, Texas Instruments Incorporated
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EVM Hardware and Software Setup
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Figure 5. bq29700 Circuit Module Connection to Cell and System Load/Charger
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5
Evaluation Board/Kit Important Notice
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FCC Warning
This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES
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EVM Warnings and Restrictions
It is important to operate this EVM within the input voltage range of 0 V to 18 V and the output voltage range of (N/A).
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.
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