Texas Instruments bq27421 EVM User Manual
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Texas Instruments bq27421 EVM User Manual

Single-cell impedance track technology
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bq27421 EVM: Single-Cell Impedance Track Technology
This evaluation module (EVM) is a complete evaluation system for the bq27421. The EVM includes one
bq27421 circuit module with an integrated current-sense resistor. A separated orderable EV2300 or
EV2400 PC interface board for gas gauge interface along with a PC USB cable, and Microsoft
based PC software is needed when using this EVM. The circuit module includes one bq27421 integrated
circuit and all other onboard components necessary to monitor and predict capacity for a system-side fuel
gauge solution. The circuit module connects directly across the battery pack. With the EV2300 or EV2400
interface board and software, the user can:
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Read the bq27421 data registers
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Update the RAM for different configurations
•
Log cycling data for further evaluation
•
Evaluate the overall functionality of the bq27421 solution under different charge and discharge
conditions
The latest Windows-based PC software can be downloaded from the product folder on the Texas
Instruments Web site.
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Microsoft, Windows are registered trademarks of Microsoft Corporation.
All other trademarks are the property of their respective owners.
SLUUA63A - April 2013 - Revised July 2016
Submit Documentation Feedback
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Copyright © 2013-2016, Texas Instruments Incorporated
SLUUA63A - April 2013 - Revised July 2016
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bq27421 EVM: Single-Cell Impedance Track Technology
User's Guide
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Summary of Contents for Texas Instruments bq27421 EVM

  • Page 1: Table Of Contents

    User's Guide SLUUA63A – April 2013 – Revised July 2016 bq27421 EVM: Single-Cell Impedance Track Technology This evaluation module (EVM) is a complete evaluation system for the bq27421. The EVM includes one bq27421 circuit module with an integrated current-sense resistor. A separated orderable EV2300 or...

  • Page 2: Contents 1 Features

    Using the CHEM_ID (0x0008) Control() Subcommand helps differentiate between the bq27425-G1A (returns 0x0128) and the bq27421-G1B (returns 0x0312). Please refer to the bq27421-G1x data sheet for information on Control() Subcommands. bq27421 EVM: Single-Cell Impedance Track Technology SLUUA63A – April 2013 – Revised July 2016 Submit Documentation Feedback Copyright ©...

  • Page 3: Bq27421-Based Circuit Module

    Low potential of load or charger connection (system VSS) Battery insertion detection input GPOUT General purpose output SLUUA63A – April 2013 – Revised July 2016 bq27421 EVM: Single-Cell Impedance Track Technology Submit Documentation Feedback Copyright © 2013–2016, Texas Instruments Incorporated...

  • Page 4: Circuit Module Physical Layout, Bill Of Materials And Schematic

    Figure 1. bq27421EVM Layout – Top Silk Figure 2. bq27421EVM Layout - Top Layer bq27421 EVM: Single-Cell Impedance Track Technology SLUUA63A – April 2013 – Revised July 2016 Submit Documentation Feedback Copyright © 2013–2016, Texas Instruments Incorporated...

  • Page 5: Bq27421Evm Layout - Power Layer

    Circuit Module Physical Layout, Bill of Materials and Schematic www.ti.com Figure 3. bq27421EVM Layout - Power Layer Figure 4. bq27421EVM Layout – Bottom Layer SLUUA63A – April 2013 – Revised July 2016 bq27421 EVM: Single-Cell Impedance Track Technology Submit Documentation Feedback Copyright © 2013–2016, Texas Instruments Incorporated...

  • Page 6: Bq27421Evm Layout - Ground Layer

    Circuit Module Physical Layout, Bill of Materials and Schematic www.ti.com Figure 5. bq27421EVM Layout – Ground Layer bq27421 EVM: Single-Cell Impedance Track Technology SLUUA63A – April 2013 – Revised July 2016 Submit Documentation Feedback Copyright © 2013–2016, Texas Instruments Incorporated...

  • Page 7: Bill Of Material

    Charger+ Application circuit only needs to include bq27421 and C1 Charger- Load-(Host) Load- Figure 6. bq27421EVM Schematic SLUUA63A – April 2013 – Revised July 2016 bq27421 EVM: Single-Cell Impedance Track Technology Submit Documentation Feedback Copyright © 2013–2016, Texas Instruments Incorporated...

  • Page 8: Bq27421 Circuits Module Performance Specification Summary

    The user that is downloading the files must be logged in as the administrator. The driver is not signed, so the administrator must allow installation of unsigned drivers in the operating system. If using Windows 7, install the software with administrator privileges. bq27421 EVM: Single-Cell Impedance Track Technology SLUUA63A – April 2013 – Revised July 2016 Submit Documentation Feedback...

  • Page 9: Hardware Connection

    Table 4. Circuit Module to EV2300 or EV2400 Connections bq27421EVM EV2300 or EV2400 GND/VSS The bq27421EVM is now set up for operation. SLUUA63A – April 2013 – Revised July 2016 bq27421 EVM: Single-Cell Impedance Track Technology Submit Documentation Feedback Copyright © 2013–2016, Texas Instruments Incorporated...

  • Page 10: Operation

    Operation This section details the operation of the bqStudio software. Starting the Program Run bqStudio from the Start | All Programs | Texas Instruments | Battery Management Studio. The main screen (Figure 8) appears. If instead of Figure 8...

  • Page 11: Setting Programmable Bq27421 Options

    IMPORTANT: The correct setting of these options is essential to get the best performance. The settings can be configured using the Data Memory screen (Figure 10). SLUUA63A – April 2013 – Revised July 2016 bq27421 EVM: Single-Cell Impedance Track Technology Submit Documentation Feedback Copyright © 2013–2016, Texas Instruments Incorporated...

  • Page 12: Data Memory Screen

    If the Gauge Dashboard is not displaying any information, then the bq27421 may not be supported by the bqStudio version being used, a bqStudio upgrade may be required. bq27421 EVM: Single-Cell Impedance Track Technology SLUUA63A – April 2013 – Revised July 2016 Submit Documentation Feedback Copyright ©...

  • Page 13: Calibration

    1. Remove load and short PACK– to LOAD–. 2. Press the Calibrate button. Figure 11. Calibration Screen SLUUA63A – April 2013 – Revised July 2016 bq27421 EVM: Single-Cell Impedance Track Technology Submit Documentation Feedback Copyright © 2013–2016, Texas Instruments Incorporated...

  • Page 14: Advanced Communication I

    C read/write operations are not specific to any gas gauge. These operations serve as general-purpose communication tools (Figure 12). Figure 12. Advanced Communication I2C bq27421 EVM: Single-Cell Impedance Track Technology SLUUA63A – April 2013 – Revised July 2016 Submit Documentation Feedback Copyright © 2013–2016, Texas Instruments Incorporated...

  • Page 15: Parameter Q&A Screen

    Figure 13. Parameter Q&A Screen Figure 14. Golden Image Output Screen Figure 15. Perform Programming Screen SLUUA63A – April 2013 – Revised July 2016 bq27421 EVM: Single-Cell Impedance Track Technology Submit Documentation Feedback Copyright © 2013–2016, Texas Instruments Incorporated...

  • Page 16: Related Documentation From Texas Instruments

    Related Documentation from Texas Instruments To obtain a copy of any of the following TI documents, call the Texas Instruments Literature Response Center at (800) 477-8924 or the Product Information Center (PIC) at (972) 644-5580. When ordering, identify this document by its title and literature number. Updated documents also can be obtained through the TI Web site at www.ti.com...
  • Page 17 STANDARD TERMS AND CONDITIONS FOR EVALUATION MODULES Delivery: TI delivers TI evaluation boards, kits, or modules, including any accompanying demonstration software, components, or documentation (collectively, an “EVM” or “EVMs”) to the User (“User”) in accordance with the terms and conditions set forth herein. Acceptance of the EVM is expressly subject to the following terms and conditions.
  • Page 18 FCC Interference Statement for Class B EVM devices NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation.
  • Page 19 【無線電波を送信する製品の開発キットをお使いになる際の注意事項】 開発キットの中には技術基準適合証明を受けて いないものがあります。 技術適合証明を受けていないもののご使用に際しては、電波法遵守のため、以下のいずれかの 措置を取っていただく必要がありますのでご注意ください。 1. 電波法施行規則第6条第1項第1号に基づく平成18年3月28日総務省告示第173号で定められた電波暗室等の試験設備でご使用 いただく。 2. 実験局の免許を取得後ご使用いただく。 3. 技術基準適合証明を取得後ご使用いただく。 なお、本製品は、上記の「ご使用にあたっての注意」を譲渡先、移転先に通知しない限り、譲渡、移転できないものとします。 上記を遵守頂けない場合は、電波法の罰則が適用される可能性があることをご留意ください。 日本テキサス・イ ンスツルメンツ株式会社 東京都新宿区西新宿６丁目２４番１号 西新宿三井ビル 3.3.3 Notice for EVMs for Power Line Communication: Please see http://www.tij.co.jp/lsds/ti_ja/general/eStore/notice_02.page 電力線搬送波通信についての開発キットをお使いになる際の注意事項については、次のところをご覧くださ い。http://www.tij.co.jp/lsds/ti_ja/general/eStore/notice_02.page SPACER 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.
  • Page 20 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 © 2015, Texas Instruments Incorporated...
  • Page 21 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue.

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