Texas Instruments BQ79631EVM User Manual

www.ti.com
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.
General Texas Instruments High Voltage Evaluation (TI HV EVM) User Safety Guidelines...............................................
1 General Description................................................................................................................................................................4
1.1 Key Features......................................................................................................................................................................4
2 Theory of Operation................................................................................................................................................................6
2.1 Single Board.......................................................................................................................................................................7
2.2 Stacked Systems...............................................................................................................................................................
3 Connectors..............................................................................................................................................................................8
3.1 Powering the BQ79631EVM..............................................................................................................................................
3.2 Primary Input and Output
3.3 High Voltage Networks.....................................................................................................................................................10
3.4 Current Sense..................................................................................................................................................................
3.5 GPIO Connections...........................................................................................................................................................
4 Quick Start Guide..................................................................................................................................................................15
4.1 Launch Pad Connection and Example Code...................................................................................................................
4.2 USB2ANY Connection with GUI......................................................................................................................................
5 Physical Dimensions............................................................................................................................................................17
5.1 Board Dimensions............................................................................................................................................................17
6 BQ79631-Q1 EVM Schematic, Assembly, Layout, and BOM............................................................................................
6.1 Schematics.......................................................................................................................................................................18
6.2 Layout..............................................................................................................................................................................
6.3 Bill of Materials.................................................................................................................................................................28
Figure 2-1. Typical BMS System with Stacked Modules.............................................................................................................
Figure 2-2. BQ79631EVM Bridge Device
Figure 3-1. Resistors to De-solder Topside.................................................................................................................................
Figure 3-2. Resistors to De-solder Underside.............................................................................................................................
Figure 3-3. High Voltage Connections.......................................................................................................................................
Figure 3-4. GPIO4 Control Option..............................................................................................................................................11
Figure 3-5. Buffer Bypass Jumpers...........................................................................................................................................
Figure 3-6. Additional FET Option.............................................................................................................................................
Figure 5-1. Board Dimensions...................................................................................................................................................
Figure 6-1. Power Supply..........................................................................................................................................................
Figure 6-2. AFE.........................................................................................................................................................................
Figure 6-3. High Voltage Sense.................................................................................................................................................19
Figure 6-4. Insulation Detection.................................................................................................................................................20
Figure 6-5. Current Sense.........................................................................................................................................................
Figure 6-6. Voltage Shifter.........................................................................................................................................................
Figure 6-7. Communications (COMMH and
Figure 6-8. Hardware.................................................................................................................................................................22
Figure 6-9. Top Overlay.............................................................................................................................................................
SLUUCC3 - FEBRUARY 2021
Submit Document Feedback
ABSTRACT

Table of Contents

Connectors................................................................................................................................8
List of Figures
Configuration..............................................................................................................7
COMML)...............................................................................................................21
Copyright © 2023 Texas Instruments Incorporated
Table of Contents
BQ79631EVM Evaluation Module
3
7
8
13
14
15
16
18
23
6
9
9
10
12
13
17
18
19
20
21
23
1