BQ29700 EVM User Guide Datasheet by Rochester Electronics, LLC

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l TEXAS INSTRUMENTS
User's Guide
SLUUAZ3March 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.
Contents
1 Features....................................................................................................................... 1
2 bq29700-Based Circuit Module ............................................................................................ 2
3 bq29700 Circuit Module Schematic ....................................................................................... 2
4 Circuit Module Physical Layouts and Bill of Materials .................................................................. 3
5 EVM Hardware and Software Setup ...................................................................................... 4
List of Figures
1 bq29700 Schematic ......................................................................................................... 2
2 Top Assembly ................................................................................................................ 3
3 Top Layer .................................................................................................................... 3
4 Bottom Layer ................................................................................................................. 3
5 bq29700 Circuit Module Connection to Cell and System Load/Charger ............................................. 5
List of Tables
1 Ordering Information ........................................................................................................ 1
2 Bill of Materials............................................................................................................... 4
1 Features
bq29700-based circuit module
Link to support documentation
1.1 Ordering Information
Table 1. Ordering Information
EVM Part Number Chemistry Configuration Capacity
bq29700EVM-610 Li-Ion 1-Series Cell Any
All trademarks are the property of their respective owners.
1
SLUUAZ3March 2014 bq29700 Single-cell Li-Ion Protector EVM
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l TEXAS INSTRUMENTS }—-7 “j E {j a N{
NC 1
COUT 2
DOUT 3
VSS
4
BAT
5
V-
6
U1
bq29700DSE
5,6,84,7
1,2,
Q1
5,6,8 4,7
1,2,
Q2
5.1M
R4
2.2K
R2
5.1M
R3
330
R1
GND
Net-Tie
GND
mid
TP2
Cell - TP3
Pack-
TP1
Cell+
1
2
J1
1
2
J2
0.1µF
C1
Cell+
Cell- Pack+
Pack-
TP4
DOUT
TP5
COUT
TP6
V - Max Vin = 6V
Max Iin = 5A
bq29700-Based Circuit Module
www.ti.com
2 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 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
3 bq29700 Circuit Module Schematic
This section contains information on the schematic for the bq29700 implementation.
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–.
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Circuit Module Physical Layouts and Bill of Materials
4 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
www.ti.com
4.2 Bill of Materials
Table 2. Bill of Materials
Designator Quantity Value Description Package Part Number Manufacturer
Reference
PCB1 1 Printed Circuit Board PWR610 Any
C1 1 0.1 µF CAP, CERM, 0.1µF, 50V, 0603 GRM188R71H104KA93D MuRata
±10%, X7R, 0603
J1, J2 2 Terminal Block, 6A, 3.5mm 7.0 x 8.2 x ED555/2DS On-Shore
Pitch, 2-Pos, TH 6.5 mm Technology
Q1, Q2 2 25 V MOSFET, N-CH, 25V, 5A, SON 2x2 mm CSD16301Q2 Texas
SON 2x2 mm Instruments
R1 1 330 RES, 330 ohm, 5%, 0402 CRCW0402330RJNED Vishay-Dale
0.063W, 0402
R2 1 2.2 kΩRES, 2.2 kohm, 5%, 1/16W, 0402 CRCW04022K20JNED Vishay Dale
0402
R3, R4 2 5.1 MΩRES, 5.1 Mohm, 5%, 0402 RC1005J515CS Samsung
1/16W, 0402 Electromechanics
TP1 1 Red Test Point, Miniature, Red, Red Miniature 5000 Keystone
TH Test point
TP2, TP3, 5 Black Test Point, Miniature, Black, Black 5001 Keystone
TP4, TP5, TH Miniature
TP6 Test point
U1 1 Li-Ion/Li Polymer Battery DSE0006A bq29700DSE Texas
Protection IC, DSE0006A Instruments
4.3 bq29700 Circuit Module Performance Specification Summary
This section summarizes the performance specifications of the bq29700 circuit module.
Performance Specification Summary
Specification Min Typ Max Unit
Input voltage Pack+ to Pack– 0 4 6 V
Charge and discharge current 0 1 5 A
5 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.
4bq29700 Single-cell Li-Ion Protector EVM SLUUAZ3March 2014
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Copyright © 2014, Texas Instruments Incorporated
l TEXAS INSTRUMENTS Chivw/ mad can Ea can El J].- — I1 ”I, Tbms Chll-
www.ti.com
EVM Hardware and Software Setup
Figure 5. bq29700 Circuit Module Connection to Cell and System Load/Charger
5
SLUUAZ3March 2014 bq29700 Single-cell Li-Ion Protector EVM
Submit Documentation Feedback Copyright © 2014, Texas Instruments Incorporated
Evaluation Board/Kit Important Notice
Texas Instruments (TI) provides the enclosed product(s) under the following conditions:
This evaluation board/kit 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. Persons handling the product(s) must have
electronics training and observe good engineering practice standards. As such, the goods being provided are not intended to be complete
in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including product safety and environmental
measures typically found in end products that incorporate such semiconductor components or circuit boards. This evaluation board/kit does
not fall within the scope of the European Union directives regarding electromagnetic compatibility, restricted substances (RoHS), recycling
(WEEE), FCC, CE or UL, and therefore may not meet the technical requirements of these directives or other related directives.
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 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
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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
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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
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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
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FCC Warning
This evaluation board/kit 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 rules, which are
designed to provide reasonable protection against radio frequency interference. Operation of this equipment in other environments may
cause interference with radio communications, in which case the user at his own expense will be required to take whatever measures may
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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.
Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265
Copyright © 2014, Texas Instruments Incorporated
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