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User's Guide
BQ76942 Evaluation Module
Matt Sunna
The BQ76942EVM evaluation module (EVM) is a complete evaluation system for the BQ76942, a 3-cell to 10-
cell Li-Ion battery monitor integrated circuit. The EVM consists of a BQ76942 circuit module which is used for
simple evaluation of the BQ76942 monitor function. The circuit module includes one BQ76942 integrated circuit
(IC), sense resistor, thermistors, power FETs, and all other onboard components necessary to protect the cells
from overcharge, over discharge, short circuit, overcurrent discharge, over temperature and under temperature
in a 10-series cell Li-Ion or Li-Polymer battery pack. The circuit module connects directly across the cells in a
battery, or can be connected with a power supply and the included cell simulator resistors. With the on-board
interface or compatible external interface board and Microsoft
(GUI) software, the user can view the device registers, evaluate voltage, current and temperature accuracy,
perform calibration, adjust protection limits and enable FET control outputs.
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Features...................................................................................................................................................................................3
Contents........................................................................................................................................................................3
1.2 Ordering Information..........................................................................................................................................................
1.4 Required Equipment..........................................................................................................................................................
2 BQ76942 EVM Quick Start Guide..........................................................................................................................................
2.1 Before You Begin...............................................................................................................................................................
Start..........................................................................................................................................................................4
3 Battery Management Studio Software..................................................................................................................................
Requirements........................................................................................................................................................7
BQStudio.............................................................................................................................................................7
3.3 BQ769x2 bqz File Installation............................................................................................................................................
3.4 BQStudio Operation and Registers View...........................................................................................................................
3.5 Commands.......................................................................................................................................................................
3.6 Data Memory....................................................................................................................................................................
3.7 Calibration........................................................................................................................................................................
Sequences......................................................................................................................................................15
Simulator...................................................................................................................................................................17
4.2 Evaluating with Load Current...........................................................................................................................................
4.4 Evaluating with Simulated Current...................................................................................................................................
4.5 Reducing the Cell Count..................................................................................................................................................
4.6 Connecting Cells..............................................................................................................................................................
Host........................................................................................................................................................20
4.8 Hardware Configuration...................................................................................................................................................
Layout....................................................................................................................................................................23
Materials.................................................................................................................................................................31
Compliance.........................................................................................................................................................38
SLUUC32A - NOVEMBER 2019 - REVISED OCTOBER 2020
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ABSTRACT
Table of Contents
Use...............................................................................................................................................17
Currents.....................................................................................................................17
Programming...............................................................................................................................22
Construction........................................................................................................23
Copyright © 2020 Texas Instruments Incorporated
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Summary.........................................................................................3
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BQ76942 Evaluation Module
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Summary of Contents for Texas Instruments BQ76942EVM
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Page 1: Table Of Contents
Matt Sunna ABSTRACT The BQ76942EVM evaluation module (EVM) is a complete evaluation system for the BQ76942, a 3-cell to 10- cell Li-Ion battery monitor integrated circuit. The EVM consists of a BQ76942 circuit module which is used for simple evaluation of the BQ76942 monitor function. The circuit module includes one BQ76942 integrated circuit... - Page 2 ® and Windows ® are registered trademarks of Microsoft Corporation. All other trademarks are the property of their respective owners. BQ76942 Evaluation Module SLUUC32A – NOVEMBER 2019 – REVISED OCTOBER 2020 Submit Document Feedback Copyright © 2020 Texas Instruments Incorporated...
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Page 3: Features
• Electronic load or assorted resistors Additional equipment may be desired to operate the BQ76942 with a more extensive demonstration. SLUUC32A – NOVEMBER 2019 – REVISED OCTOBER 2020 BQ76942 Evaluation Module Submit Document Feedback Copyright © 2020 Texas Instruments Incorporated... -
Page 4: Bq76942 Evm Quick Start Guide
The following warnings and cautions are noted for the safety of anyone using or working close to the BQ76942 EVM. Observe all safety precautions. Warning The BQ76942EVM circuit module may become hot during operation due to dissipation of heat. Avoid contact with the board. Follow all applicable safety procedures applicable to your laboratory. - Page 5 16.When complete with this quick start demonstration, exit the BQStudio software and turn off the power supply. Refer to other sections of this user guide for additional details. SLUUC32A – NOVEMBER 2019 – REVISED OCTOBER 2020 BQ76942 Evaluation Module Submit Document Feedback Copyright © 2020 Texas Instruments Incorporated...
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Page 6: Figure 2-1. Evm Connection For Basic Operation
DC Power Supply Position shunts Install cell simulator shunts to uC_SCL and uC_SDA Figure 2-1. EVM Connection for Basic Operation BQ76942 Evaluation Module SLUUC32A – NOVEMBER 2019 – REVISED OCTOBER 2020 Submit Document Feedback Copyright © 2020 Texas Instruments Incorporated... -
Page 7: Battery Management Studio Software
Proceed? window which must be acknowledged. If the software still can not find the device, a Battery Management Studio popup window appears indicating communication status. Acknowledge the message to proceed. SLUUC32A – NOVEMBER 2019 – REVISED OCTOBER 2020 BQ76942 Evaluation Module Submit Document Feedback Copyright © 2020 Texas Instruments Incorporated... -
Page 8: Figure 3-1. Target Selection Wizard
The tool tip closes after approximately 30 seconds. To avoid the tool tip display move the cursor to the value or units column, or to the Dashboard pane. BQ76942 Evaluation Module SLUUC32A – NOVEMBER 2019 – REVISED OCTOBER 2020 Submit Document Feedback Copyright © 2020 Texas Instruments Incorporated... -
Page 9: Figure 3-2. Bqstudio Window Without Device
If a device is connected and powered after BQStudio is powered, dashboard may auto detect the device and update the device and register display. Figure 3-3 shows a register display with a connected device. SLUUC32A – NOVEMBER 2019 – REVISED OCTOBER 2020 BQ76942 Evaluation Module Submit Document Feedback Copyright © 2020 Texas Instruments Incorporated... -
Page 10: Figure 3-3. Register View With Device
These tabs can be closed with the "X" as desired, but closing the tab may terminate the operation running in the tab. Figure 3-4. Tool Selections BQ76942 Evaluation Module SLUUC32A – NOVEMBER 2019 – REVISED OCTOBER 2020 Submit Document Feedback Copyright © 2020 Texas Instruments Incorporated... -
Page 11: Commands
Data Memory must be written after bit changes, a button is provided under the bit SLUUC32A – NOVEMBER 2019 – REVISED OCTOBER 2020 BQ76942 Evaluation Module Submit Document Feedback Copyright © 2020 Texas Instruments Incorporated... -
Page 12: Figure 3-6. Data Memory Bit Field Change
6. Select the Program Data Memory to OTP Memory button. If successful, the display is similar to the check. 7. Adjust the board voltage back to normal operating conditions, cycle power, and test as desired. BQ76942 Evaluation Module SLUUC32A – NOVEMBER 2019 – REVISED OCTOBER 2020 Submit Document Feedback Copyright © 2020 Texas Instruments Incorporated... -
Page 13: Calibration
Measuring each cell voltage value is recommended rather than using a common value if individual cell voltage calibration is desired. SLUUC32A – NOVEMBER 2019 – REVISED OCTOBER 2020 BQ76942 Evaluation Module Submit Document Feedback Copyright © 2020 Texas Instruments Incorporated... -
Page 14: Figure 3-8. Calibration View
Battery Management Studio Software www.ti.com Figure 3-8. Calibration View BQ76942 Evaluation Module SLUUC32A – NOVEMBER 2019 – REVISED OCTOBER 2020 Submit Document Feedback Copyright © 2020 Texas Instruments Incorporated... -
Page 15: Command Sequences
Command Sequence File Assignment Buttons section. Results can be viewed in the Transaction Log and saved to a file if desired. SLUUC32A – NOVEMBER 2019 – REVISED OCTOBER 2020 BQ76942 Evaluation Module Submit Document Feedback Copyright © 2020 Texas Instruments Incorporated... -
Page 16: Figure 3-11. Command Sequence View
Battery Management Studio Software www.ti.com Figure 3-11. Command Sequence View BQ76942 Evaluation Module SLUUC32A – NOVEMBER 2019 – REVISED OCTOBER 2020 Submit Document Feedback Copyright © 2020 Texas Instruments Incorporated... -
Page 17: Bq76942 Circuit Module Use
Be sure to set the supplies appropriately to prevent exceeding the ratings of the EVM. SLUUC32A – NOVEMBER 2019 – REVISED OCTOBER 2020 BQ76942 Evaluation Module Submit Document Feedback Copyright © 2020 Texas Instruments Incorporated... -
Page 18: Evaluating With Simulated Current
The battery simulation supply must never be reversed. DC Power Supply (Simulated load) DC Power Supply Install cell simulator shunts Figure 4-3. Simulating Current Setup BQ76942 Evaluation Module SLUUC32A – NOVEMBER 2019 – REVISED OCTOBER 2020 Submit Document Feedback Copyright © 2020 Texas Instruments Incorporated... -
Page 19: Reducing The Cell Count
SLUUC32A – NOVEMBER 2019 – REVISED OCTOBER 2020 BQ76942 Evaluation Module Submit Document Feedback Copyright © 2020 Texas Instruments Incorporated... -
Page 20: Connecting To A Host
Do not connect the MCU board to both the J2 GND and J13 PACK- terminals, this will short the sense resistor and could result in damage to equipment or unexpected results. BQ76942 Evaluation Module SLUUC32A – NOVEMBER 2019 – REVISED OCTOBER 2020 Submit Document Feedback Copyright © 2020 Texas Instruments Incorporated... -
Page 21: Hardware Configuration
4.8 Hardware Configuration 4.8.1 Configuration Jumpers Certain features on the BQ76942EVM may be configured by jumpers or shunts on headers. See Section 5.4 details of the header pins. Not all configurations are compatible with all register settings, the user should set pins appropriately for the register settings planned. -
Page 22: Configuration Register Programming
By default, these jumpers are configured for I2C communication. 7. Restart BQStudio. BQStudio should now automatically detect the device and the updated communication protocol. BQ76942 Evaluation Module SLUUC32A – NOVEMBER 2019 – REVISED OCTOBER 2020 Submit Document Feedback Copyright © 2020 Texas Instruments Incorporated... -
Page 23: Bq76942Evm Circuit Module Physical Construction
5.1 Board Layout The BQ76942EVM circuit module is a 4.0-inch × 5.0-inch 4-layer circuit card assembly. It is designed for easy assembly with cell connections on the left edge to a terminal block. Pack terminals are on the top edge using a terminal block. -
Page 24: Figure 5-2. Top Assembly
BQ76942EVM Circuit Module Physical Construction www.ti.com Figure 5-2. Top Assembly BQ76942 Evaluation Module SLUUC32A – NOVEMBER 2019 – REVISED OCTOBER 2020 Submit Document Feedback Copyright © 2020 Texas Instruments Incorporated... -
Page 25: Figure 5-3. Top Layer
BQ76942EVM Circuit Module Physical Construction Figure 5-3. Top Layer SLUUC32A – NOVEMBER 2019 – REVISED OCTOBER 2020 BQ76942 Evaluation Module Submit Document Feedback Copyright © 2020 Texas Instruments Incorporated... -
Page 26: Figure 5-4. Layer 2
BQ76942EVM Circuit Module Physical Construction www.ti.com Figure 5-4. Layer 2 BQ76942 Evaluation Module SLUUC32A – NOVEMBER 2019 – REVISED OCTOBER 2020 Submit Document Feedback Copyright © 2020 Texas Instruments Incorporated... -
Page 27: Figure 5-5. Layer 3
BQ76942EVM Circuit Module Physical Construction Figure 5-5. Layer 3 SLUUC32A – NOVEMBER 2019 – REVISED OCTOBER 2020 BQ76942 Evaluation Module Submit Document Feedback Copyright © 2020 Texas Instruments Incorporated... -
Page 28: Figure 5-6. Bottom Layer
BQ76942EVM Circuit Module Physical Construction www.ti.com Figure 5-6. Bottom Layer BQ76942 Evaluation Module SLUUC32A – NOVEMBER 2019 – REVISED OCTOBER 2020 Submit Document Feedback Copyright © 2020 Texas Instruments Incorporated... -
Page 29: Figure 5-7. Bottom Silk Screen
BQ76942EVM Circuit Module Physical Construction Figure 5-7. Bottom Silk Screen SLUUC32A – NOVEMBER 2019 – REVISED OCTOBER 2020 BQ76942 Evaluation Module Submit Document Feedback Copyright © 2020 Texas Instruments Incorporated... -
Page 30: Figure 5-8. Bottom Assembly
BQ76942EVM Circuit Module Physical Construction www.ti.com Figure 5-8. Bottom Assembly BQ76942 Evaluation Module SLUUC32A – NOVEMBER 2019 – REVISED OCTOBER 2020 Submit Document Feedback Copyright © 2020 Texas Instruments Incorporated... -
Page 31: Bill Of Materials
BQ76942EVM Circuit Module Physical Construction 5.2 Bill of Materials The bill of materials for the circuit module is shown in Table 5-1. Substitute parts may be used in the manufacturing of the assembly. Table 5-1. BQ76942 Circuit Module Bill of Materials... - Page 32 BQ76942EVM Circuit Module Physical Construction www.ti.com Table 5-1. BQ76942 Circuit Module Bill of Materials (continued) Designator Quantity Value Description Package Reference Part Number Manufacturer 2200pF CAP, CERM, 2200 pF, 10 8.85012E+11 Wurth Elektronik V, +/- 10%, X7R, 0402 D1, D2, D10...
- Page 33 BQ76942EVM Circuit Module Physical Construction Table 5-1. BQ76942 Circuit Module Bill of Materials (continued) Designator Quantity Value Description Package Reference Part Number Manufacturer Header, 2.54 mm, 2x1, Header, 2.54mm, 2x1, TH 61300211121 Wurth Elektronik Gold, TH Header, 2.54mm, 4x1, Header, 2.54mm, 4x1, TH 22284043...
- Page 34 BQ76942EVM Circuit Module Physical Construction www.ti.com Table 5-1. BQ76942 Circuit Module Bill of Materials (continued) Designator Quantity Value Description Package Reference Part Number Manufacturer R50, R51 3.9k RES, 3.9 k, 5%, 1 W, 2512 CRCW25123K90JNEG Vishay-Dale AEC-Q200 Grade 0, 2512...
- Page 35 BQ76942EVM Circuit Module Physical Construction Table 5-1. BQ76942 Circuit Module Bill of Materials (continued) Designator Quantity Value Description Package Reference Part Number Manufacturer TP14, TP15, TP16, TP17 4 Test Point, Compact, Black Compact Testpoint 5006 Keystone Black, TH Multicell Battery Monitor...
- Page 36 BQ76942EVM Circuit Module Physical Construction www.ti.com Table 5-1. BQ76942 Circuit Module Bill of Materials (continued) Designator Quantity Value Description Package Reference Part Number Manufacturer C23, C24, C29, C31 0.1uF CAP, CERM, 0.1 uF, 100 GCJ188R72A104KA01D MuRata V,+/- 10%, X7R, AEC-...
- Page 37 BQ76942EVM Circuit Module Physical Construction Table 5-1. BQ76942 Circuit Module Bill of Materials (continued) Designator Quantity Value Description Package Reference Part Number Manufacturer R79, R80 5.1k RES, 5.1 k, 5%, 0.25 W, 1206 CRCW12065K10JNEA Vishay-Dale AEC-Q200 Grade 0, 1206...
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Page 38: Reach Compliance
In compliance with the Article 33 provision of the EU REACH regulation we are notifying you that this EVM includes component(s) containing at least one Substance of Very High Concern (SVHC) above 0.1%. These uses from Texas Instruments do not exceed 1 ton per year. The SVHC’s are: Table 5-2. REACH Components... -
Page 39: Schematic
BQ76942EVM Circuit Module Physical Construction 5.4 Schematic Figure 5-9 through Figure 5-12 illustrate the schematics. Input 45V 10A BAT+ EXTTS2 REGIN REG1 REG1 REG2 100V REG2 0.47uF 100pF 100V 20.0 220nF 20.0 VC10 PACK VC10 PACK PACK 220nF 20.0... -
Page 40: Figure 5-10. Schematic Diagram Pin Configuration
BQ76942EVM Circuit Module Physical Construction www.ti.com Multi-function Pins for External Communication -------------------------------------------------------------- CFETOFF / SPI_CS HDQ / SPI_MOSI SDA / SPI_MISO uController SCL / SPI_SCLK interface type Pull-up / ALERT / HDQ selection pull-down selection REG1 TP20 uC_SPI_CS CFETOFF EXT_SPI_CS... -
Page 41: Figure 5-11. Schematic Diagram Fets
BQ76942EVM Circuit Module Physical Construction TP25 BAT+ TP26 1.0k 0.1uF 0.1uF 0.1uF Net-Tie CPACK+ 1.0k CPACK+ 4.7k CPACK+ 0.1uF 0.1uF 1.0k 0.1uF FBAT 0.1uF 1,2,3 1.0k 5,6, TP27 0.1uF SFK-3030 0.1uF 1.0k 0.1uF BQ771807DPJR TP28 0.1uF 0.1uF MMBTA56LT1G PGND FUSE 3.9k... -
Page 42: Figure 5-12. Schematic Diagram Interface Adapter
BQ76942EVM Circuit Module Physical Construction www.ti.com 3.3V Level Translation for digital signals from device to uC 0.1uF REG1 3.3V 0.1uF VCCA VCCB QGND uC_SPI_MISO_A TP42 uC_SPI_MISO_B P4_2 QGND REG1 uC_SCL QGND uC_SDA SN74LVC2T45DCTR QGND uC_HDQ P1.0/TA0CLK/ACLK P2.0/TA1.1 uC_HDQ P1.1/TA0.0 P2.1/TA1.2 uC_SPI_CS P1.2/TA0.1... -
Page 43: Related Documents From Texas Instruments
Related Documents from Texas Instruments 6 Related Documents from Texas Instruments • Texas Instruments, BQ76942 3S-5S Battery Monitor and Protector data sheet • Texas Instruments, BQ76942 Technical Reference Manual • Texas Instruments, Easy Configuration of BQ76942, BQ76952 Battery Monitors •... - Page 44 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 45 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 46 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 47 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 48 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 49 TI products. TI’s provision of these resources does not expand or otherwise alter TI’s applicable warranties or warranty disclaimers for TI products. Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright © 2020, Texas Instruments Incorporated...
- Page 50 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Texas Instruments BQ76942EVM...
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