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EVM User's Guide: BQ76905EVM
BQ76905 Evaluation Module
Description
The Texas Instruments' BQ76905EVM is a complete
evaluation system for the BQ76905, The BQ76905 is
a highly integrated, high accuracy battery monitor and
protector for 2-series to 5-series Li-Ion, LiPolymer,
and LiFePO4 battery packs.
The circuit module connects directly to 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
interface (GUI) software, the user can view the device
registers, evaluate voltage, current and temperature
accuracy, adjust protection limits and enable FET
control outputs.
Get Started
1. Order the BQ76905 EVM from ti.com.
2. Download the latest BQSTUDIO-TEST from the
BQSTUDIO
tool page.
SLUUCY9 – NOVEMBER 2023
Submit Document Feedback
®
based PC graphical user
Copyright © 2023 Texas Instruments Incorporated
3. Follow the instructions in this user's guide to get
started.
Features
•
Complete evaluation system for the BQ76905 2-
cell to 5-cell Li-Ion, LiPolymer, and LiFePO4 high
accuracy battery monitor
•
Power connections available on test points
•
Communication available with included USB
interface adapter or available on 4-pin connector
•
Resistor cell simulator for quick setup with only a
power supply
•
PC software available for configuration
Applications
•
Cordless power tools and garden tools
•
Vacuum cleaners
•
Non-military drones
•
Other industrial battery pack (2-series to 5-series)
Description
BQ76905 Evaluation Module
1
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Table of Contents
Related Manuals for Texas Instruments BQ76905
Summary of Contents for Texas Instruments BQ76905
- Page 1 Description started. The Texas Instruments' BQ76905EVM is a complete Features evaluation system for the BQ76905, The BQ76905 is a highly integrated, high accuracy battery monitor and • Complete evaluation system for the BQ76905 2- protector for 2-series to 5-series Li-Ion, LiPolymer, cell to 5-cell Li-Ion, LiPolymer, and LiFePO4 high and LiFePO4 battery packs.
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Page 2: Kit Contents
C host communication interface supporting up to 400-kHz operation with optional CRC. The evaluation module includes one BQ76905 integrated circuit (IC), sense resistor, one thermistor, 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. -
Page 3: Before You Begin
2 Hardware 2.1 Before You Begin The following warnings and cautions are noted for the safety of anyone using or working close to the BQ76905 EVM. Observe all safety precautions. The BQ76905EVM circuit module can become hot during operation due to Warning dissipation of heat. -
Page 4: Required Equipment
2.3 BQ76905 Circuit Module Use The BQ76905 circuit module contains the BQ76905 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 5 EVM. Bipolar DC Power Supply (source/sink) Bipolar DC Power Supply (source/sink) Install cell simulator shunts Figure 2-2. Evaluating with Charge or Discharge Current SLUUCY9 – NOVEMBER 2023 BQ76905 Evaluation Module Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated...
- Page 6 Polarity can be reversed on the load supply to simulate a charge current. The battery simulation supply must never be reversed. DC Power Supply Install cell DC Power Supply simulator shunts (Simulated load) Figure 2-3. Simulating Current Setup BQ76905 Evaluation Module SLUUCY9 – NOVEMBER 2023 Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated...
- Page 7 2.3.5 Reducing the Cell Count The BQ76905 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 shorting unused cells at the input terminal block.
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Page 8: Connecting Cells
For 4 cells, connect 3th cell to CELL6 to CELL3 inputs Remove cell simulator shunts to avoid draining cells Figure 2-5. Example Connection with 4 Cells BQ76905 Evaluation Module SLUUCY9 – NOVEMBER 2023 Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated... -
Page 9: Connecting To A Host
To do this, unpopulate J6 and J2, and populate J1 and J5. J6 and J2 disconnect the I2C lines of the BQ76905 from the on-board MCU. J1 and J5 connect the I2C pullup resistors to REGOUT. - Page 10 FETs on the EVM. This section does not describe current protection settings. These steps describe quick connection of the BQ76905 EVM to demonstrate operation of the AFE portion of the EVM. For more detailed descriptions, refer to other sections of the user's guide.
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Page 11: System Requirements
4.1.3 BQ76905 bqz File Installation The BQStudio software uses a .bqz file to configure the displays for the BQ76905 device family or specific family device. This is normally provided in the BQStudio installation. If provided separately, copy the .bqz file to the config directory in the installation, typically C:\ti\BatteryManagementStudio\config. - Page 12 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 panel. BQ76905 Evaluation Module SLUUCY9 – NOVEMBER 2023 Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated...
- Page 13 If a device is connected and powered after BQStudio is powered, then the dashboard auto-detects the device and update the device and register display. Figure 4-3 shows a register display with a connected device. SLUUCY9 – NOVEMBER 2023 BQ76905 Evaluation Module Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated...
- Page 14 These tabs can be closed with the X as desired, but closing the tab can terminate the operation running in the tab. Figure 4-4. Tool Selections BQ76905 Evaluation Module SLUUCY9 – NOVEMBER 2023 Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated...
- Page 15 4.1.6.1 Entering, Saving, and Loading Configuration Most of the configuration of the BQ76905 is accomplished through setting values in the data memory. The data memory locations are accessed using the buttons in the Data Memory view. The Parameter View selection at the top of the panel allows the choice of basic parameters, which shows commonly used parameters, or all parameters which shows more configuration parameters.
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Page 16: Command Sequences
Command Sequence File Assignment Buttons section. Results can be viewed in the Transaction Log and saved to a file if desired. Figure 4-7. Command Sequence View BQ76905 Evaluation Module SLUUCY9 – NOVEMBER 2023 Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated... - Page 17 Output 0.1uF TP33 TP34 TP24 5,6, 5,6, BAT- 1,2,3 1,2,3 TP25 0.001 PACK- 0.1uF 0.1uF TP26 TP27 TP28 TP29 Figure 5-1. Schematic Diagram Monitor SLUUCY9 – NOVEMBER 2023 BQ76905 Evaluation Module Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated...
- Page 18 3.3V RS T TES T Ne t-Tie QGND MP 1 MP 2 MP 3 MP 4 TP32 2200pF QGND Figure 5-2. Schematic Diagram Adapter BQ76905 Evaluation Module SLUUCY9 – NOVEMBER 2023 Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated...
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Page 19: Board Layout
An on-board interface adapter with USB connector is located in the right lower corner. See additional information in the configuration and operation sections of this document. Figure 5-3. Top Layer Figure 5-4. Bottom Layer SLUUCY9 – NOVEMBER 2023 BQ76905 Evaluation Module Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated... - Page 20 Transparent SJ-5303 (CLEAR) Bumpon J1, J2, J5, J6, J7, J8 Header, 100mil, 2x1, Tin, TH Header, 2 PIN, PEC02SAAN Sullins Connector 100mil, Tin Solutions BQ76905 Evaluation Module SLUUCY9 – NOVEMBER 2023 Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated...
- Page 21 RES, 33, 5%, 0.063 W, AEC-Q200 Grade 0, 0402 CRCW040233R0JNED Vishay-Dale 0402 2.0k RES, 2.0 k, 5%, 0.063 W, AEC-Q200 Grade 0, 0402 CRCW04022K00JNED Vishay-Dale 0402 SLUUCY9 – NOVEMBER 2023 BQ76905 Evaluation Module Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated...
- Page 22 85 degC, 80-pin QFP (PN), Green (RoHS & no Sb/Br) U5, U6, U8, U9 Single-Channel ESD in 0402 Package With 10 DPY0002A Texas Instruments pF Capacitance and 6 V Breakdown, DPY0002A (X1SON-2) BQ76905 Evaluation Module SLUUCY9 – NOVEMBER 2023 Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated...
- Page 23 RES, 10 M, 5%, 0.1 W, AEC-Q200 Grade 0, 0603 CRCW060310M0JNEA Vishay-Dale 0603 TP30, TP31 Test Point, Compact, Red, TH Red Compact 5005 Keystone Testpoint SLUUCY9 – NOVEMBER 2023 BQ76905 Evaluation Module Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated...
- Page 24 6 Additional Information Trademarks Microsoft ® and Windows ® are registered trademarks of Microsoft Corporation. All trademarks are the property of their respective owners. BQ76905 Evaluation Module SLUUCY9 – NOVEMBER 2023 Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated...
- Page 25 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 26 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 27 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 28 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 29 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 © 2023, Texas Instruments Incorporated...
- Page 30 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 © 2023, Texas Instruments Incorporated...
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