Texas Instruments bq27441-G1 Technical Reference
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Texas Instruments bq27441-G1 Technical Reference

Texas Instruments bq27441-G1 Technical Reference

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bq27441-G1
Technical Reference
Literature Number: SLUUAC9A
December 2013 – Revised May 2015

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Summary of Contents for Texas Instruments bq27441-G1

  • Page 1 Technical Reference Literature Number: SLUUAC9A December 2013 – Revised May 2015...

  • Page 2: Table Of Contents

    Temperature(): 0x02 and 0x03 ....................Voltage(): 0x04 and 0x05 ....................Flags(): 0x06 and 0x07 ................NominalAvailableCapacity(): 0x08 and 0x09 ................FullAvailableCapacity(): 0x0A and 0x0B Contents SLUUAC9A – December 2013 – Revised May 2015 Submit Documentation Feedback Copyright © 2013–2015, Texas Instruments Incorporated...
  • Page 3 ..................6.4.2 Gas (Fuel) Gauging Class ....................6.4.3 Ra Table Class ....................6.4.4 Calibration Class ..................... 6.4.5 Security Class .......................... Revision History SLUUAC9A – December 2013 – Revised May 2015 Contents Submit Documentation Feedback Copyright © 2013–2015, Texas Instruments Incorporated...

  • Page 4: Preface

    UNSEALED mode 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 Support Center at (512) 434-1560. When ordering, identify this document by its title and literature number.
  • Page 5 Related Documentation from Texas Instruments www.ti.com SLUUAC9A – December 2013 – Revised May 2015 Preface Submit Documentation Feedback Copyright © 2013–2015, Texas Instruments Incorporated...

  • Page 6: General Description

    -based batteries for 4.3-V or 4.35-V maximum charge voltage. Unlike some other Impedance Track™ fuel gauges, the bq27441-G1 cannot be programmed with specific battery chemistry profiles. For many battery types and applications, the predefined standard chemistry profiles available in the bq27441-G1A or bq27441-G1B fuel gauge are sufficient matches from a gauging perspective.
  • Page 7 SLUUAC9A – December 2013 – Revised May 2015 General Description Submit Documentation Feedback Copyright © 2013–2015, Texas Instruments Incorporated...

  • Page 8: Functional Description

    Functional Description Fuel Gauging The bq27441-G1 battery fuel gauge measures the cell voltage, temperature, and current to determine battery SOC. The fuel gauge monitors the charging and discharging of the battery by sensing the voltage across a small-value, external sense resistor (10 mΩ, typical) between the SRN and SRP pins. By integrating the charge passing through the battery, the battery SOC is adjusted during the charging or discharging of the battery.

  • Page 9: Operating Modes

    Because the gauge consumes the most power in NORMAL mode, the Impedance Track™ algorithm minimizes the time the fuel gauge remains in this mode. SLUUAC9A – December 2013 – Revised May 2015 Functional Description Submit Documentation Feedback Copyright © 2013–2015, Texas Instruments Incorporated...

  • Page 10: Sleep Mode

    During HIBERNATE mode, RAM-based data values are maintained, but gauging status is lost. Upon exit from HIBERNATE mode, the fuel gauge will immediately reacquire measurements and reinitialize all gauging predictions. Functional Description SLUUAC9A – December 2013 – Revised May 2015 Submit Documentation Feedback Copyright © 2013–2015, Texas Instruments Incorporated...
  • Page 11 = Sleep gauge sees cell relaxed in ~3 seconds System Shutdown Figure 2-1. Power Mode Diagram SLUUAC9A – December 2013 – Revised May 2015 Functional Description Submit Documentation Feedback Copyright © 2013–2015, Texas Instruments Incorporated...

  • Page 12: Pin Descriptions

    Host sends BAT_INSERT subcommand to Host sends BAT_REMOVE subcommand to signal battery insertion. signal battery removal. Functional Description SLUUAC9A – December 2013 – Revised May 2015 Submit Documentation Feedback Copyright © 2013–2015, Texas Instruments Incorporated...
  • Page 13 Pin Descriptions www.ti.com SLUUAC9A – December 2013 – Revised May 2015 Functional Description Submit Documentation Feedback Copyright © 2013–2015, Texas Instruments Incorporated...

  • Page 14: Application Examples

    May take up to 1 second. If the device was previously SEALED, return to SEALED mode by sending the wr 0x00 0x20 0x00; Control(0x0020) subcommand. Application Examples SLUUAC9A – December 2013 – Revised May 2015 Submit Documentation Feedback Copyright © 2013–2015, Texas Instruments Incorporated...
  • Page 15 Data Memory Parameter Update Example www.ti.com SLUUAC9A – December 2013 – Revised May 2015 Application Examples Submit Documentation Feedback Copyright © 2013–2015, Texas Instruments Incorporated...

  • Page 16: Standard Commands

    / % RemainingCapacityUnfiltered() 0x28 and 0x29 RemainingCapacityFiltered() 0x2A and 0x2B FullChargeCapacityUnfiltered() 0x2C and 0x2D FullChargeCapacityFlitered() 0x2E and 0x2F StateOfChargeUnfiltered() 0x30 and 0x31 Standard Commands SLUUAC9A – December 2013 – Revised May 2015 Submit Documentation Feedback Copyright © 2013–2015, Texas Instruments Incorporated...

  • Page 17: Control(): 0X00 And 0X01

    StateOfCharge(). EXIT_RESIM 0x0044 Exits CONFIG UPDATE mode without an OCV measurement and resimulates with the updated configuration data to update StateOfCharge(). SLUUAC9A – December 2013 – Revised May 2015 Standard Commands Submit Documentation Feedback Copyright © 2013–2015, Texas Instruments Incorporated...

  • Page 18: Control_Status: 0X0000

    4.1.2 DEVICE_TYPE: 0x0001 Instructs the fuel gauge to return the device type to addresses 0x00 and 0x01. The value returned is 0x0421. (Note: Value returned is 0x0421 even if the product is bq27441-G1 so the distinguishing identification requires both DEVICE_TYPE and DM_CODE) 4.1.3 FW_VERSION: 0x0002...

  • Page 19: Chem_Id: 0X0008

    The SEALED state blocks accidental writes of specific subcommands (see Table 4-2) and most Standard and Extended Commands (see Table 4-1 Table 5-1, respectively). SLUUAC9A – December 2013 – Revised May 2015 Standard Commands Submit Documentation Feedback Copyright © 2013–2015, Texas Instruments Incorporated...

  • Page 20: Pulse_Soc_Int: 0X0023

    This read-only function returns an unsigned integer value of the measured cell-pack voltage in mV with a range of 0 to 6000 mV. Standard Commands SLUUAC9A – December 2013 – Revised May 2015 Submit Documentation Feedback Copyright © 2013–2015, Texas Instruments Incorporated...

  • Page 21: Flags(): 0X06 And 0X07

    If OpConfigB [SMOOTHEN] = 1, this register is equal to RemainingCapacityFiltered(); otherwise, it is equal to RemainingCapacityUnfiltered(). Units are mAh. SLUUAC9A – December 2013 – Revised May 2015 Standard Commands Submit Documentation Feedback Copyright © 2013–2015, Texas Instruments Incorporated...

  • Page 22: Fullchargecapacity(): 0X0E And 0X0F

    0.1°K as measured by the fuel gauge. If OpConfig [TEMPS] = 0, this command will return the same value as Temperature(). Standard Commands SLUUAC9A – December 2013 – Revised May 2015 Submit Documentation Feedback Copyright © 2013–2015, Texas Instruments Incorporated...

  • Page 23: Stateofhealth(): 0X20 And 0X21

    StateOfChargeUnfiltered() is always calculated as RemainingCapacityUnfiltered() / FullChargeCapacityUnfiltered(), rounded up to the nearest whole percentage point. SLUUAC9A – December 2013 – Revised May 2015 Standard Commands Submit Documentation Feedback Copyright © 2013–2015, Texas Instruments Incorporated...
  • Page 24 StateOfChargeUnfiltered(): 0x30 and 0x31 www.ti.com Standard Commands SLUUAC9A – December 2013 – Revised May 2015 Submit Documentation Feedback Copyright © 2013–2015, Texas Instruments Incorporated...

  • Page 25: Extended Data Commands

    Example: writing a 0x00 to DataBlock() specifies access to the first 32-byte block and a 0x01 specifies access to the second 32-byte block, and so on. SEALED Access: This command is not available in SEALED mode. SLUUAC9A – December 2013 – Revised May 2015 Extended Data Commands Submit Documentation Feedback Copyright © 2013–2015, Texas Instruments Incorporated...

  • Page 26: Blockdata(): 0X40 Through 0X5F

    BlockData() to access to RAM. SEALED Access: This command is not available in SEALED mode. Reserved – 0x62 through 0x7F Extended Data Commands SLUUAC9A – December 2013 – Revised May 2015 Submit Documentation Feedback Copyright © 2013–2015, Texas Instruments Incorporated...
  • Page 27 Reserved – 0x62 through 0x7F www.ti.com SLUUAC9A – December 2013 – Revised May 2015 Extended Data Commands Submit Documentation Feedback Copyright © 2013–2015, Texas Instruments Incorporated...

  • Page 28: Data Memory

    The default access mode of the fuel gauge is UNSEALED, so the system processor must send a SEALED subcommand after a gauge reset to utilize the data protection feature. Data Memory SLUUAC9A – December 2013 – Revised May 2015 Submit Documentation Feedback Copyright © 2013–2015, Texas Instruments Incorporated...

  • Page 29: Sealing And Unsealing Data Memory Access

    SOCF Clear Threshold Registers OpConfig 0x00 0xFFFF 0x25F8 Flag OpConfigB 0x00 0xFF 0x0F Flag Power Hibernate I 8000 Hibernate V 5000 2200 SLUUAC9A – December 2013 – Revised May 2015 Data Memory Submit Documentation Feedback Copyright © 2013–2015, Texas Instruments Incorporated...
  • Page 30 Quit Current 2000 0.1 Hr rate Dsg Relax Time 65535 Chg Relax Time Quit Relax Time Max IR Correct 1000 Data Memory SLUUAC9A – December 2013 – Revised May 2015 Submit Documentation Feedback Copyright © 2013–2015, Texas Instruments Incorporated...
  • Page 31 Avg I Last Run –32768 –1 –50 0.1 Hr rate Avg P Last Run –32768 –1 –50 0.1 Hr rate Delta Voltage 1000 SLUUAC9A – December 2013 – Revised May 2015 Data Memory Submit Documentation Feedback Copyright © 2013–2015, Texas Instruments Incorporated...
  • Page 32 Table 6-6. Data Memory Summary–Security Class Subclass Subclass Offset Name Type Value Unit Default Codes Sealed to Unsealed 0x0001 0xFFFF 0x8000 0001 FFFF 8000 Data Memory SLUUAC9A – December 2013 – Revised May 2015 Submit Documentation Feedback Copyright © 2013–2015, Texas Instruments Incorporated...

  • Page 33: Bq27441 Data Memory Parameter Descriptions

    The Flags() [FC] bit is set when Primary Charge Termination conditions are met and FC Set % is set to –1%. Section 6.4.2.3.11 for details about the Primary Charge Termination Algorithm. SLUUAC9A – December 2013 – Revised May 2015 Data Memory Submit Documentation Feedback Copyright © 2013–2015, Texas Instruments Incorporated...
  • Page 34 Initial MaxLoad whenever the battery is charged to full after a previous discharge to an SOC less than 50%. This prevents the reported value from maintaining an unusually high value. Default value depends on the system. Data Memory SLUUAC9A – December 2013 – Revised May 2015 Submit Documentation Feedback Copyright © 2013–2015, Texas Instruments Incorporated...
  • Page 35 Flags() [SOCF] bit is set. This bit is cleared once StateOfCharge() rises to or above SOCF Clear Threshold. The [SOCF] bit serves as the final discharge warning. These values are up to the user's preference. SLUUAC9A – December 2013 – Revised May 2015 Data Memory Submit Documentation Feedback Copyright © 2013–2015, Texas Instruments Incorporated...
  • Page 36 RSVD0 = Reserved. Default is 0. (Set to 0 for proper operation) RSVD1 = Reserved. Default is 1. (Set to 1 for proper operation) Data Memory SLUUAC9A – December 2013 – Revised May 2015 Submit Documentation Feedback Copyright © 2013–2015, Texas Instruments Incorporated...

  • Page 37: Gas (Fuel) Gauging Class

    Voltage < Terminate Voltage + Fast Qmax Start Volt Delta • Current < C / Fast Qmax Current Threshold 6.4.2.1.3 Fast Qmax End DOD%, Fast Qmax Minimum Data Points SLUUAC9A – December 2013 – Revised May 2015 Data Memory Submit Documentation Feedback Copyright © 2013–2015, Texas Instruments Incorporated...
  • Page 38 Default IT Cfg Qmax Filter Qmax updates are filtered to prevent corrupt values. It is not recommended to change this value. Data Memory SLUUAC9A – December 2013 – Revised May 2015 Submit Documentation Feedback Copyright © 2013–2015, Texas Instruments Incorporated...
  • Page 39 Maximum and minimum limits for current used in simulation runs. The parameters are functions of DesignCapacity() (that is, C / Max Sim Rate or C / Min Sim Rate). SLUUAC9A – December 2013 – Revised May 2015 Data Memory Submit Documentation Feedback Copyright © 2013–2015, Texas Instruments Incorporated...
  • Page 40 Chg Current Threshold 2000 0.1 h Quit Current 1000 0.1 h Dsg Relax Time 65535 Chg Relax Time Quit Relax Time Data Memory SLUUAC9A – December 2013 – Revised May 2015 Submit Documentation Feedback Copyright © 2013–2015, Texas Instruments Incorporated...
  • Page 41 SLUUAC9A – December 2013 – Revised May 2015 Data Memory Submit Documentation Feedback Copyright © 2013–2015, Texas Instruments Incorporated...
  • Page 42 (constant-current). A no-load rate of compensation is applied to this reserve capacity. This is a specialized function to allow time for a controlled shutdown after zero RemainingCapacity() is reached. Data Memory SLUUAC9A – December 2013 – Revised May 2015 Submit Documentation Feedback Copyright © 2013–2015, Texas Instruments Incorporated...
  • Page 43 Design energy / 5: C Rate based off of Design Energy /5 or a C / 5 rate in mA . SLUUAC9A – December 2013 – Revised May 2015 Data Memory Submit Documentation Feedback Copyright © 2013–2015, Texas Instruments Incorporated...
  • Page 44 Design Capacity or Design Energy to scale data for the Impedance Track™ algorithm. Default Design Cap should never require modification for any specific application. Data Memory SLUUAC9A – December 2013 – Revised May 2015 Submit Documentation Feedback Copyright © 2013–2015, Texas Instruments Incorporated...
  • Page 45 [BATLOWEN] is cleared. In this case, the GPOUT pin generates interrupts with ~1-ms pulse width under various conditions as described in Table 2-1. SLUUAC9A – December 2013 – Revised May 2015 Data Memory Submit Documentation Feedback Copyright © 2013–2015, Texas Instruments Incorporated...
  • Page 46 It represents the full charge point for a given system which can vary from charger to charger and also depends on temperature and other factors. 6.4.2.3.14 Average Current Last Run Data Memory SLUUAC9A – December 2013 – Revised May 2015 Submit Documentation Feedback Copyright © 2013–2015, Texas Instruments Incorporated...
  • Page 47 Min Delta Voltage is set to a value above zero, then Delta Voltage should also be initialized to at least the same value as Min Delta Voltage. SLUUAC9A – December 2013 – Revised May 2015 Data Memory Submit Documentation Feedback Copyright © 2013–2015, Texas Instruments Incorporated...

  • Page 48: Ra Table Class

    This gives a profile of resistance throughout the entire SOC profile of the battery cells concentrating more on the values closer to 0%. Data Memory SLUUAC9A – December 2013 – Revised May 2015 Submit Documentation Feedback Copyright © 2013–2015, Texas Instruments Incorporated...

  • Page 49: Calibration Class

    Pack V Offset should not require modification by the user. It is modified by the Voltage Calibration function from Calibration mode. SLUUAC9A – December 2013 – Revised May 2015 Data Memory Submit Documentation Feedback Copyright © 2013–2015, Texas Instruments Incorporated...
  • Page 50 1. If the PCB layout has issues that cause inconsistent board offsets from board to board. 2. An extra noisy environment. Data Memory SLUUAC9A – December 2013 – Revised May 2015 Submit Documentation Feedback Copyright © 2013–2015, Texas Instruments Incorporated...

  • Page 51: Security Class

    UNSEALED state for 4 seconds upon exiting CONFIG UPDATE mode. Any subcommand greater than 0x001A will restart the 4-second timer. SLUUAC9A – December 2013 – Revised May 2015 Data Memory Submit Documentation Feedback Copyright © 2013–2015, Texas Instruments Incorporated...
  • Page 52 Data Memory Parameter Descriptions www.ti.com Data Memory SLUUAC9A – December 2013 – Revised May 2015 Submit Documentation Feedback Copyright © 2013–2015, Texas Instruments Incorporated...

  • Page 53: Revision History

    Section 6.4.2.1.5 ........................ • Added Section 6.4.2.1.6 ........................ • Added Section 6.4.2.1.7 ........................ • Added Section 6.4.2.1.9 ....................... • Added Section 6.4.2.1.13 SLUUAC9A – December 2013 – Revised May 2015 Data Memory Submit Documentation Feedback Copyright © 2013–2015, Texas Instruments Incorporated...
  • Page 54 • Added 'and scaled by Design Capacity or Default Design Cap' (3 places) ................... • Added additional description to Section 6.4.5.1.1 Revision History SLUUAC9A – December 2013 – Revised May 2015 Submit Documentation Feedback Copyright © 2013–2015, Texas Instruments Incorporated...
  • Page 55 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 56 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 57 【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 58 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 59 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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