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User's Guide
BQ79631EVM Evaluation Module
The BQ79631 Evaluation Module user's guide describes the safety considerations, general features, theory of
operation, hardware setup, and use of the BQ79631 EVM. Throughout this user's guide, the abbreviations
BMS039, EVM, and the term evaluation module are synonymous with the BQ79631EVM unless otherwise
noted. This EVM is an evaluation board for the BQ79631-Q1 to provide monitoring, protecting, and
communications in high voltage environments within EV/HEVs.
1 General Texas Instruments High Voltage Evaluation (TI HV EVM) User Safety Guidelines............................................
Description................................................................................................................................................................6
Features......................................................................................................................................................................6
Operation................................................................................................................................................................8
Board.......................................................................................................................................................................9
3.2 Stacked Systems...............................................................................................................................................................
4 Connectors............................................................................................................................................................................
BQ79631EVM.............................................................................................................................................11
4.2 Primary Input and Output Connectors..............................................................................................................................
Networks.....................................................................................................................................................13
4.4 Current Sense..................................................................................................................................................................
4.5 GPIO Connections...........................................................................................................................................................
Guide..................................................................................................................................................................19
5.1 Launch Pad Connection and Example Code...................................................................................................................
5.2 USB2ANY Connection with GUI......................................................................................................................................
Dimensions............................................................................................................................................................21
Dimensions............................................................................................................................................................21
7 BQ79631-Q1 EVM Schematic, Assembly, Layout, and BOM............................................................................................
7.1
Schematics.......................................................................................................................................................................22
7.2 Layout..............................................................................................................................................................................
Materials.................................................................................................................................................................33
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Figure 1-3.
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Figure 3-1. Typical BMS System with Stacked Modules.............................................................................................................
Figure 4-3. High Voltage Connections.......................................................................................................................................
Figure 4-4. ................................................................................................................................................................................
Figure 4-5. GPIO4 Control Option.............................................................................................................................................
Figure 4-6. Buffer Bypass Jumpers...........................................................................................................................................
Figure 4-7. Additional FET Option.............................................................................................................................................
Figure 6-1. Board Dimensions...................................................................................................................................................
Figure 7-1. Power Supply..........................................................................................................................................................
Figure 7-2. AFE.........................................................................................................................................................................
Sense.................................................................................................................................................24
SLUUCC3 - FEBRUARY 2021
ABSTRACT
Table of Contents
List of Figures
Configuration............................................................................................................10
Topside.................................................................................................................................13
Underside.............................................................................................................................13
Copyright © 2021 Texas Instruments Incorporated
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Summary of Contents for Texas Instruments BQ79631EVM
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Page 1: Table Of Contents
BQ79631 EVM. Throughout this user's guide, the abbreviations BMS039, EVM, and the term evaluation module are synonymous with the BQ79631EVM unless otherwise noted. This EVM is an evaluation board for the BQ79631-Q1 to provide monitoring, protecting, and communications in high voltage environments within EV/HEVs. - Page 2 Table 4-6. Pin Descriptions................................ Table 4-7. Resistors................................... Table 4-8. Bypass Jumpers............................... Table 5-1. Connections................................Trademarks All trademarks are the property of their respective owners. BQ79631EVM Evaluation Module SLUUCC3 – FEBRUARY 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated...
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Page 3: General Texas Instruments High Voltage Evaluation (Ti Hv Evm) User Safety Guidelines
General Texas Instruments High Voltage Evaluation (TI HV EVM) User Safety Guidelines 1 General Texas Instruments High Voltage Evaluation (TI HV EVM) User Safety Guidelines Figure 1-1. Figure 1-2. Figure 1-3. Always follow TI’s setup and application instructions, including use of all interface components within their recommended electrical rated voltage and power limits. - Page 4 High Voltage Danger The BQ79631EVM is rated as a high voltage EVM, but it is not required to operate this EVM at high voltage. Measurements on the high voltage networks of the board may be taken from 400/800V connections or by a built in VCC40V connection.
- Page 5 General Texas Instruments High Voltage Evaluation (TI HV EVM) User Safety Guidelines If you apply high voltage to this board, all terminals should be considered high voltage. Electric shock is possible when connecting the board to live wire. The board should be handled with care by a professional. For safety, use of isolated test equipment with overvoltage and overcurrent protection is highly recommended.
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Page 6: General Description
All differential voltage sense inputs are integrated post ADC in digital low pass filters. In addition to the voltage sense pins, the BQ79631EVM also has integrated current sense with a low shunt resistor. There are also 8 GPIOs/auxiliary inputs that can be used to measure additional voltages, NTC thermistors, and drive relays. - Page 7 Ambient temperature –40 °C to 105 °C Nominal operating temperature –20 °C to 60 °C Cell balancing current Approximately 200 mA @ 80 °C SLUUCC3 – FEBRUARY 2021 BQ79631EVM Evaluation Module Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated...
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Page 8: Theory Of Operation
WAKE tone when using the BQ79631EVM in a stack other BQ79616EVM boards for a large battery pack. (Typically an auto address signal is needed if using the BQ79631EVM in a stack of other BQ devices but is not needed if using a single BQ79631EVM). -
Page 9: Single Board
3.2 Stacked Systems It is also possible to use the BQ79631EVM in a system of other BQ devices. If the user wishes test the BQ79631EVM in a system of other BQ79631EVMs, this is possible through use of the daisy chain communications bus. -
Page 10: Figure 3-2. Bq79631Evm Bridge Device
Figure 3-2. BQ79631EVM Bridge Device Configuration If using the BQ79631EVM in a system with the BQ79600EVM, it is recommended to configure the BQ79600EVM as the bridge device and the BQ79631EVM as a stack device. If V/I synchronization is a priority, it is recommended in the final design, to configure the system with two separate BQ79600 devices as seen in figure. -
Page 11: Connectors
4.1 Powering the BQ79631EVM Power to enable the use of the BQ79631EVM is supplied through the 5V_LV connector on the left side of the board. Simply connect the positive and negative terminals of a power supply set to 5 V to the pins 5V_LV and GNDLV respectively. - Page 12 R123, R127, R129, R120, R121, R124, and R126 slots with 0-Ω resistors and T2 and T3 with transformers. This will allow the signal to flow through the underside of the EVM where the transformers (T2 and T3) are located. BQ79631EVM Evaluation Module SLUUCC3 – FEBRUARY 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated...
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Page 13: High Voltage Networks
EVM where these voltages are dissipated are shown in the figure below. Extra care should be taken around this area of the EVM. SLUUCC3 – FEBRUARY 2021 BQ79631EVM Evaluation Module Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 14: Figure 4-3. High Voltage Connections
Negative connection for the LINK_Plus network Charge_Plus 400/800 V Positive connection for the charge network Charge_Neg 400/800 V Negative connection for the charge network BQ79631EVM Evaluation Module SLUUCC3 – FEBRUARY 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 15: Figure 4-5. Gpio4 Control Option
VCC40V supply. 4.3.4 Switches In each of the high voltage networks on the BQ79631EVM, there are MOSFET switches controlled by GPIO pins that may disconnect the high voltage inputs from the rest of the network. These switches should always remain on while measurement is taking place but may be off to block any leakage current from escaping the battery pack while not in use. -
Page 16: Figure 4-6. Buffer Bypass Jumpers
Charge_Plus 4.3.6 Insulation Detection Network The insulation detection network on the BQ79631EVM located around HV_plus allows the user to ensure that all high voltage networks within their design are properly insulated from low voltage ground. To utilize this feature, first ensure that GPIO2, and GPIO3 are both configured as “output high” and that GPIO1 is set to ADC only input. -
Page 17: Current Sense
The VCSamp_Out connection may be used simultaneously with the measurements being taken through SRP and SRN. 4.5 GPIO Connections On the BQ79631EVM there are 8 GPIO pins that can be used for a variety of purposes and may be configured in the following manners: •... - Page 18 GPIO1-3 pins are used to control FET switches throughout the EVM. GPIO4-7 can also be used as Master SPI pins to control external devices such as EEPROM or Relay/Contactor Driver. BQ79631EVM Evaluation Module SLUUCC3 – FEBRUARY 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated...
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Page 19: Quick Start Guide
Installer.exe and extract files to the default path provided (C:\ti\bq79631-Q1 Example Code 0.1). 2. Launch Code Composer Studio (CCS): Start → Programs → Texas Instruments → Code Composer Studio v8 → Code Composer Studio v8 3. When it launches, CCS requests a workspace is selected, choose “C:\myWorkspace”. - Page 20 Please refer to the picture below and this is explained in more detail in the USB2ANY Interface Adapter User's Guide and the BQ79616-Q1 and BQ75614-Q1 GUI User's Guide. BQ79631EVM Evaluation Module SLUUCC3 – FEBRUARY 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated...
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Page 21: Physical Dimensions
Top - Tallest component (GPIO, Shunts) is x.xx in (x.x mm) above PCB • Bottom - Tallest component if populated (Transformers) is x.xx in (x.xx mm) above PCB (Depopulated by default) Figure 6-1. Board Dimensions SLUUCC3 – FEBRUARY 2021 BQ79631EVM Evaluation Module Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 22: Bq79631-Q1 Evm Schematic, Assembly, Layout, And Bom
7 BQ79631-Q1 EVM Schematic, Assembly, Layout, and BOM This section provides the EVM schematic, assembly, layout and BOM in their respective sections. 7.1 Schematics Figure 7-1. Power Supply BQ79631EVM Evaluation Module SLUUCC3 – FEBRUARY 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 23: Figure 7-2. Afe
BQ79631-Q1 EVM Schematic, Assembly, Layout, and BOM Figure 7-2. AFE SLUUCC3 – FEBRUARY 2021 BQ79631EVM Evaluation Module Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 24: Figure 7-3. High Voltage Sense
BQ79631-Q1 EVM Schematic, Assembly, Layout, and BOM www.ti.com Figure 7-3. High Voltage Sense BQ79631EVM Evaluation Module SLUUCC3 – FEBRUARY 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 25: Figure 7-4. Insulation Detection
BQ79631-Q1 EVM Schematic, Assembly, Layout, and BOM Figure 7-4. Insulation Detection Figure 7-5. Current Sense SLUUCC3 – FEBRUARY 2021 BQ79631EVM Evaluation Module Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 26: Figure 7-6. Voltage Shifter
BQ79631-Q1 EVM Schematic, Assembly, Layout, and BOM www.ti.com Figure 7-6. Voltage Shifter Figure 7-7. Communications (COMMH and COMML) BQ79631EVM Evaluation Module SLUUCC3 – FEBRUARY 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 27: Figure 7-8. Hardware
BQ79631-Q1 EVM Schematic, Assembly, Layout, and BOM Figure 7-8. Hardware SLUUCC3 – FEBRUARY 2021 BQ79631EVM Evaluation Module Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 28: Layout
BQ79631-Q1 EVM Schematic, Assembly, Layout, and BOM www.ti.com 7.2 Layout Figure 7-9. Top Overlay Figure 7-10. Bottom Overlay BQ79631EVM Evaluation Module SLUUCC3 – FEBRUARY 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 29: Figure 7-11. Top Solder
BQ79631-Q1 EVM Schematic, Assembly, Layout, and BOM Figure 7-11. Top Solder Figure 7-12. Top Layer SLUUCC3 – FEBRUARY 2021 BQ79631EVM Evaluation Module Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 30: Figure 7-13. Signal Layer 1
BQ79631-Q1 EVM Schematic, Assembly, Layout, and BOM www.ti.com Figure 7-13. Signal Layer 1 Figure 7-14. Signal Layer 2 BQ79631EVM Evaluation Module SLUUCC3 – FEBRUARY 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 31: Figure 7-15. Bottom Layer
BQ79631-Q1 EVM Schematic, Assembly, Layout, and BOM Figure 7-15. Bottom Layer Figure 7-16. Bottom Solder SLUUCC3 – FEBRUARY 2021 BQ79631EVM Evaluation Module Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 32: Figure 7-17. Drill Drawing
BQ79631-Q1 EVM Schematic, Assembly, Layout, and BOM www.ti.com Figure 7-17. Drill Drawing BQ79631EVM Evaluation Module SLUUCC3 – FEBRUARY 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 33: Bill Of Materials
Header, 2.54mm, 1x2, Tin, Black, TH Header, 2.54mm, 2x1, TH PEC01DAAN Sullins Connector J15, J16, J17, J18, Solutions J19, J20, J21, J22, J24, J29, J30, J31, SLUUCC3 – FEBRUARY 2021 BQ79631EVM Evaluation Module Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 34: Figure 1-4
R106, R107, R108, R109, R110, R111 R2, R8, R32, R33, 124k RES, 124 k, 0.1%, 0.1 W, 0603 0603 RG1608P-1243-B-T5 Susumu Co Ltd R44, R46, R117 BQ79631EVM Evaluation Module SLUUCC3 – FEBRUARY 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... - Page 35 R144, R145, R146, RES, 0, 5%, 0.333 W, AEC-Q200 Grade 0805 CRCW08050000Z0EAHP Vishay-Dale R147, R148, R149, 0, 0805 R150, R151, R152, R153, R154, R155 SLUUCC3 – FEBRUARY 2021 BQ79631EVM Evaluation Module Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated...
- Page 36 Instruments Low Power Quad Operational Amplifier, Texas Instruments 14-pin Narrow SOIC Automotive Catalog Dual Operational D0008A LM2904QDRQ1 Texas Instruments Texas Amplifier, D0008A (SOIC-8) Instruments BQ79631EVM Evaluation Module SLUUCC3 – FEBRUARY 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated...
- Page 37 TL720M05QKVURQ1 Texas Instruments Fixed 5 V Output, 5.5 to 42 V Input, 3-pin PFM (KVU), -40 to 125 degC, Green (RoHS & no Sb/Br) SLUUCC3 – FEBRUARY 2021 BQ79631EVM Evaluation Module Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated...
- Page 38 STANDARD TERMS FOR EVALUATION MODULES Delivery: TI delivers TI evaluation boards, kits, or modules, including any accompanying demonstration software, components, and/or documentation which may be provided together or separately (collectively, an “EVM” or “EVMs”) to the User (“User”) in accordance with the terms set forth herein.
- Page 39 www.ti.com Regulatory Notices: 3.1 United States 3.1.1 Notice applicable to EVMs not FCC-Approved: FCC NOTICE: This kit is designed to allow product developers to evaluate electronic components, circuitry, or software associated with the kit to determine whether to incorporate such items in a finished product and software developers to write software applications for use with the end product.
- Page 40 www.ti.com 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...
- Page 41 www.ti.com EVM Use Restrictions and Warnings: 4.1 EVMS ARE NOT FOR USE IN FUNCTIONAL SAFETY AND/OR SAFETY CRITICAL EVALUATIONS, INCLUDING BUT NOT LIMITED TO EVALUATIONS OF LIFE SUPPORT APPLICATIONS. 4.2 User must read and apply the user guide and other available documentation provided by TI regarding the EVM prior to handling or using the EVM, including without limitation any warning or restriction notices.
- Page 42 Notwithstanding the foregoing, any judgment may be enforced in any United States or foreign court, and TI may seek injunctive relief in any United States or foreign court. Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright © 2019, Texas Instruments Incorporated...
- Page 43 TI products. TI’s provision of these resources does not expand or otherwise alter TI’s applicable warranties or warranty disclaimers for TI products.IMPORTANT NOTICE Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright © 2021, Texas Instruments Incorporated...
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