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User's Guide
BQ76922EVM Evaluation Module
The BQ76922EVM evaluation module (EVM) is a complete evaluation system for the BQ76922, a 3-cell to 5-cell
Li-Ion battery monitor integrated circuit. The EVM consists of a BQ76922 circuit module which is used for simple
evaluation of the BQ76922 monitor function. The circuit module includes one BQ76922 integrated circuit (IC),
sense resistor, power FETs, and all other onboard components necessary to protect the cells from overcharge,
over discharge, short circuit, and overcurrent discharge in a 5-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
®
Windows
®
based PC graphical user interface (GUI) software, the user can view the device registers,
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 BQ76922EVM Quick Start Guide...........................................................................................................................................
2.1 Before You Begin...............................................................................................................................................................
Start..........................................................................................................................................................................4
3 Interface Adapter....................................................................................................................................................................
4 Battery Management Studio Software..................................................................................................................................
Requirements........................................................................................................................................................7
BQStudio.............................................................................................................................................................7
4.3 BQ76922 bqz File Installation............................................................................................................................................
4.4 BQStudio Operation and Registers View...........................................................................................................................
4.5
Commands.........................................................................................................................................................................9
Memory......................................................................................................................................................................9
4.7 Calibration........................................................................................................................................................................
Sequences......................................................................................................................................................12
5 BQ76922EVM Circuit Module Use.......................................................................................................................................
Simulator...................................................................................................................................................................14
5.2 Evaluating with Load Current...........................................................................................................................................
5.4 Evaluating with Simulated Current...................................................................................................................................
5.5 Reducing the Cell Count..................................................................................................................................................
5.6 Connecting Cells..............................................................................................................................................................
Host........................................................................................................................................................17
5.8 Hardware Configuration...................................................................................................................................................
Layout....................................................................................................................................................................20
Materials.................................................................................................................................................................25
Compliance.........................................................................................................................................................28
6.4 Schematic........................................................................................................................................................................
8 Revision History...................................................................................................................................................................
SLVU957A - SEPTEMBER 2019 - REVISED NOVEMBER 2021
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ABSTRACT
Table of Contents
Currents.....................................................................................................................14
Programming...............................................................................................................................18
Construction........................................................................................................20
Instruments.....................................................................................................................32
Copyright © 2021 Texas Instruments Incorporated
Summary.................................................................................3
Table of Contents
BQ76922EVM Evaluation Module
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Summary of Contents for Texas Instruments BQ76922EVM
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Page 1: Table Of Contents
BQ76922EVM Evaluation Module ABSTRACT The BQ76922EVM evaluation module (EVM) is a complete evaluation system for the BQ76922, a 3-cell to 5-cell Li-Ion battery monitor integrated circuit. The EVM consists of a BQ76922 circuit module which is used for simple evaluation of the BQ76922 monitor function. The circuit module includes one BQ76922 integrated circuit (IC), sense resistor, power FETs, and all other onboard components necessary to protect the cells from overcharge, over discharge, short circuit, and overcurrent discharge in a 5-series cell Li-Ion or Li-Polymer battery pack. - Page 2 Microsoft ® and Windows ® are registered trademarks of Microsoft Corporation. All trademarks are the property of their respective owners. BQ76922EVM Evaluation Module SLVU957A – SEPTEMBER 2019 – REVISED NOVEMBER 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated...
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Page 3: Features
EVM to a 1P or 2P battery construction. Refer to the physical construction section for board details. 1.3 BQ76922EVM Circuit Module Performance Specification Summary This section summarizes the performance specifications of the BQ76922 circuit module in its default 5-cell series FET configuration. -
Page 4: Bq76922Evm Quick Start Guide
BQ76922EVM Quick Start Guide www.ti.com 2 BQ76922EVM Quick Start Guide 2.1 Before You Begin The following warnings and cautions are noted for the safety of anyone using or working close to the BQ76922 EVM. Observe all safety precautions. CAUTION The default settings of the BQ76922 do not limit performance to the ratings of the EVM. Set all protections appropriately and limit current for safe operation. -
Page 5: Figure 2-1. Evm Connection For Basic Operation
Refer to other sections of this user guide for additional details. DC Power Supply Install cell simulator shunts Position shunts to “INT” Figure 2-1. EVM Connection for Basic Operation SLVU957A – SEPTEMBER 2019 – REVISED NOVEMBER 2021 BQ76922EVM Evaluation Module Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 6: Interface Adapter
The BQ76922 devices are not supported with the older EV2300 interface. CAUTION Do not program the on-board adapter with version 0.18 or earlier firmware. BQ76922EVM Evaluation Module SLVU957A – SEPTEMBER 2019 – REVISED NOVEMBER 2021 Submit Document Feedback Copyright © 2021 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. SLVU957A – SEPTEMBER 2019 – REVISED NOVEMBER 2021 BQ76922EVM Evaluation Module Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 8: Figure 4-1. Target Selection Wizard
The dashboard updates periodically unless Auto Refresh is stopped by clicking on the banner. The right side of the window has the commands pane. BQ76922EVM Evaluation Module SLVU957A – SEPTEMBER 2019 – REVISED NOVEMBER 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 9: Commands
At power up, the device is configured from the OTP. On a new EVM, the OTP has only the REG0 and REG1 settings of the BQ76922, other locations are not programmed. SLVU957A – SEPTEMBER 2019 – REVISED NOVEMBER 2021 BQ76922EVM Evaluation Module Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 10: Figure 4-5. Data Memory View
The Write All tool writes all values BQ76922EVM Evaluation Module SLVU957A – SEPTEMBER 2019 – REVISED NOVEMBER 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 11: Calibration
4-9. If there is an error, a red X appears instead as shown in Figure 4-10 with a message in the bottom border. SLVU957A – SEPTEMBER 2019 – REVISED NOVEMBER 2021 BQ76922EVM Evaluation Module Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 12: Command Sequences
Files may be assigned to buttons in the Command Sequence File Assignment Buttons section. Results can be viewed in the Transaction Log and saved to a file if desired. BQ76922EVM Evaluation Module SLVU957A – SEPTEMBER 2019 – REVISED NOVEMBER 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 13: Figure 4-11. Command Sequence View
Battery Management Studio Software Figure 4-11. Command Sequence View SLVU957A – SEPTEMBER 2019 – REVISED NOVEMBER 2021 BQ76922EVM Evaluation Module Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 14: Bq76922Evm Circuit Module Use
BQ76922EVM Circuit Module Use www.ti.com 5 BQ76922EVM Circuit Module Use The BQ76922 circuit module contains the BQ76922 IC and related circuitry to demonstrate the features of the IC. Surface mount FETs are provided for the high current path. A thermistor provides temperature sensing on the board. -
Page 15: Evaluating With Simulated Current
The BQ76922 must have the top and bottom cells used for proper operation. Cell count can be reduced by shorting the unused cell inputs from the next-to-top down. Cell count can be reduced for basic evaluation by SLVU957A – SEPTEMBER 2019 – REVISED NOVEMBER 2021 BQ76922EVM Evaluation Module Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 16: Connecting Cells
EVM when connecting cells is bottom up: 1. Connect BAT– 2. Connect cells bottom up; CELL1, CELL2, CELL3 ... BQ76922EVM Evaluation Module SLVU957A – SEPTEMBER 2019 – REVISED NOVEMBER 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 17: Connecting To A Host
Do not connect the MCU board to both the J2 GND and J5 PACK- terminals, this shorts the sense resistor and could result in damage to equipment or unexpected results. SLVU957A – SEPTEMBER 2019 – REVISED NOVEMBER 2021 BQ76922EVM Evaluation Module Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 18: Hardware Configuration
5.8 Hardware Configuration 5.8.1 Configuration Jumpers Certain features on the BQ76922EVM may be configured by jumpers or shunts on headers. See Section 6.4 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 19 Hardware changes after OTP programming may result in damage to the IC or board after reset if incompatible configuration is selected. SLVU957A – SEPTEMBER 2019 – REVISED NOVEMBER 2021 BQ76922EVM Evaluation Module Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated...
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Page 20: Bq76922Evm Circuit Module Physical Construction
6.1 Board Layout The BQ76922EVM circuit module is a 3.0-inch × 4.9-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 21: Figure 6-2. Top Assembly
BQ76922EVM Circuit Module Physical Construction Figure 6-2. Top Assembly Figure 6-3. Top Layer SLVU957A – SEPTEMBER 2019 – REVISED NOVEMBER 2021 BQ76922EVM Evaluation Module Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 22: Figure 6-4. Layer 2
BQ76922EVM Circuit Module Physical Construction www.ti.com Figure 6-4. Layer 2 Figure 6-5. Layer 3 BQ76922EVM Evaluation Module SLVU957A – SEPTEMBER 2019 – REVISED NOVEMBER 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 23: Figure 6-6. Bottom Layer
BQ76922EVM Circuit Module Physical Construction Figure 6-6. Bottom Layer Figure 6-7. Bottom Silk Screen SLVU957A – SEPTEMBER 2019 – REVISED NOVEMBER 2021 BQ76922EVM Evaluation Module Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 24: Figure 6-8. Bottom Assembly
BQ76922EVM Circuit Module Physical Construction www.ti.com Figure 6-8. Bottom Assembly BQ76922EVM Evaluation Module SLVU957A – SEPTEMBER 2019 – REVISED NOVEMBER 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 25: Bill Of Materials
BQ76922EVM Circuit Module Physical Construction 6.2 Bill of Materials The bill of materials for the circuit module is shown in Table 6-1. Substitute parts may be used in the manufacturing of the assembly. Table 6-1. BQ76922 Circuit Module Bill of Materials... - Page 26 BQ76922EVM Circuit Module Physical Construction www.ti.com Table 6-1. BQ76922 Circuit Module Bill of Materials (continued) Alternate Alternate Designator Value Description Package Reference Part Number Part Number 80 V Transistor, NPN, 80 V, 1 A, SOT-89 SOT-89 BCX5616TA Diodes Inc. Q4, Q5 -60V MOSFET, P-CH, -60 V, -0.9 A, SOT-23...
- Page 27 BQ76922EVM Circuit Module Physical Construction Table 6-1. BQ76922 Circuit Module Bill of Materials (continued) Alternate Alternate Designator Value Description Package Reference Part Number Part Number U6, U7, U9, U10 Single-Channel ESD in 0402 Package With 10pF DPY0002A TPD1E10B06DPYT Texas Instruments...
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Page 28: 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 6-2. REACH Components... -
Page 29: Schematic
BQ76922EVM Circuit Module Physical Construction 6.4 Schematic Figure 6-9 through Figure 6-11 illustrate the schematics. Input 22V 10A BAT+ 0.47uF 100pF BAT- 20.0 VC4A VC4B 0.22uF PACK VC3A PACK PACK 20.0 VC3B 0.22uF PCHG 20.0 PCHG PCHG 0.22uF PDSG... -
Page 30: Figure 6-10. Schematic Diagram Fets
BQ76922EVM Circuit Module Physical Construction www.ti.com TP22 0.1uF 0.1uF CPACK+ CPACK+ 1.0k CPACK+ 0.1uF FBAT TP23 SFK-3030 0.1uF TP24 0.1uF 0.1uF PGND 1.0k FUSE PDgate 1.0k 0.1uF 0.1uF 1.0k TP25 0.1uF 3.9k PACK+ PACK+ 1.0k PACK+ 0.1uF PCgate 0.1uF PACK- 1.0k... -
Page 31: Figure 6-11. Schematic Diagram Interface Adapter
BQ76922EVM Circuit Module Physical Construction 3.3V SCL2 SDA2 P1.0/TA0CLK/ACLK P2.0/TA1.1 P1.1/TA0.0 P2.1/TA1.2 P1.2/TA0.1 P2.2/TA2CLK/SMCLK P1.3/TA0.2 P2.3/TA2.0 P1.4/TA0.3 P2.4/TA2.1 P1.5/TA0.4 P2.5/TA2.2 P1.6/TA1CLK/CBOUT P2.6/RTCCLK/DMAE0 P1.7/TA1.0 P2.7/UCB0STE/UCA0CLK P3.0/UCB0SIMO/UCB0SDA P4.0/PM_UCB1STE/PM_UCA1CLK P3.1/UCB0SOMI/UCB0SCL P4.1/PM_UCB1SIMO/PM_UCB1SDA P3.2/UCB0CLK/UCA0STE P4.2/PM_UCB1SOMI/PM_UCB1SCL P3.3/UCA0TXD/UCA0SIMO P4.3/PM_UCB1CLK/PM_UCA1STE Net-Tie SCL2 SCL2 SCL2 P3.4/UCA0RXD/UCA0SOMI P4.4/PM_UCA1TXD/PM_UCA1SIMO SDA2... -
Page 32: Related Documents From Texas Instruments
Related Documents from Texas Instruments www.ti.com 7 Related Documents from Texas Instruments • Texas Instruments, BQ76922 3S-5S Battery Monitor and Protector data sheet • Texas Instruments, BQ76922 Technical Reference Manual • Texas Instruments, BQ7718 Overvoltage Protection for 2 to 5-Series Cell Li-Ion Batt w/ Int Delay Timer data... - Page 33 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 34 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 35 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 36 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 37 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 38 TI products. TI’s provision of these resources does not expand or otherwise alter TI’s applicable warranties or warranty disclaimers for TI products. TI objects to and rejects any additional or different terms you may have proposed. IMPORTANT NOTICE Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright © 2021, Texas Instruments Incorporated...
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