ZHCSF78E June   2016  – April 2019 BQ35100

PRODUCTION DATA.  

  1. 1 特性
  2. 2 应用
  3. 3 说明
    1.     Device Images
      1.      简化原理图
  4. 4 修订历史记录
  5. 5 Pin Configuration and Functions
    1.     Pin Functions
  6. 6 Specifications
    1. 6.1  Absolute Maximum Ratings
    2. 6.2  ESD Ratings
    3. 6.3  Recommended Operating Conditions
    4. 6.4  Thermal Information
    5. 6.5  Power Supply Current Static Modes
    6. 6.6  Digital Input and Outputs
    7. 6.7  Power-On Reset
    8. 6.8  LDO Regulator
    9. 6.9  Internal Temperature Sensor
    10. 6.10 Internal Clock Oscillators
    11. 6.11 Integrating ADC (Coulomb Counter)
    12. 6.12 ADC (Temperature and Voltage Measurements)
    13. 6.13 Data Flash Memory
    14. 6.14 I2C-Compatible Interface Timing Characteristics
    15. 6.15 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Basic Measurement Systems
        1. 7.3.1.1 Voltage
        2. 7.3.1.2 Temperature
        3. 7.3.1.3 Coulombs
        4. 7.3.1.4 Current
      2. 7.3.2 Battery Gauging
        1. 7.3.2.1 ACCUMULATOR (ACC) Mode
        2. 7.3.2.2 STATE-OF-HEALTH (SOH) Mode
          1. 7.3.2.2.1 Low State-of-Health Alert
        3. 7.3.2.3 END-OF-SERVICE (EOS) Mode
          1. 7.3.2.3.1 Initial EOS Learning
            1. 7.3.2.3.1.1 End-Of-Service Detection
      3. 7.3.3 Power Control
      4. 7.3.4 Battery Condition Warnings
        1. 7.3.4.1 Battery Low Warning
        2. 7.3.4.2 Temperature Low Warning
        3. 7.3.4.3 Temperature High Warning
        4. 7.3.4.4 Battery Low SOH Warning
        5. 7.3.4.5 Battery EOS OCV BAD Warning
      5. 7.3.5 ALERT Signal
      6. 7.3.6 Lifetime Data Collection
      7. 7.3.7 SHA-1 Authentication
      8. 7.3.8 Data Commands
        1. 7.3.8.1 Command Summary
        2. 7.3.8.2 0x00, 0x01 AltManufacturerAccess() and 0x3E, 0x3F AltManufacturerAccess()
        3. 7.3.8.3 Control(): 0x00/0x01
      9. 7.3.9 Communications
        1. 7.3.9.1 I2C Interface
    4. 7.4 Device Functional Modes
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Preparation for Gauging
        2. 8.2.2.2 Gauging Mode Selection
          1. 8.2.2.2.1 ACCUMULATOR Mode
            1. 8.2.2.2.1.1 STATE-OF-HEALTH (Voltage Correlation) Mode
            2. 8.2.2.2.1.2 END-OF-SERVICE (Resistance Correlation) Mode
        3. 8.2.2.3 Voltage Measurement Selection
        4. 8.2.2.4 Temperature Measurement Selection
        5. 8.2.2.5 Current Sense Resistor Selection
        6. 8.2.2.6 Expected Device Usage Profiles
        7. 8.2.2.7 Using the BQ35100 Fuel Gauge with a Battery and Capacitor in Parallel
          1. 8.2.2.7.1 ACCUMULATOR Mode
          2. 8.2.2.7.2 STATE-OF-HEALTH Mode
          3. 8.2.2.7.3 END-OF-SERVICE Mode
      3. 8.2.3 EOS Mode Load Pulse Synchronization
      4. 8.2.4 Benefits of the BQ35100 Gauge Compared to Alternative Monitoring Techniques
      5. 8.2.5 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
      1. 10.1.1 Introduction
      2. 10.1.2 Power Supply Decoupling Capacitor
      3. 10.1.3 Capacitors
      4. 10.1.4 Communication Line Protection Components
    2. 10.2 Layout Example
      1. 10.2.1 Ground System
      2. 10.2.2 Kelvin Connections
      3. 10.2.3 Board Offset Considerations
    3. 10.3 ESD Spark Gap
  11. 11器件和文档支持
    1. 11.1 文档支持
      1. 11.1.1 相关文档
    2. 11.2 接收文档更新通知
    3. 11.3 社区资源
    4. 11.4 商标
    5. 11.5 静电放电警告
    6. 11.6 术语表
  12. 12机械、封装和可订购信息

封装选项

机械数据 (封装 | 引脚)
散热焊盘机械数据 (封装 | 引脚)
订购信息

8.2.2.7.3 END-OF-SERVICE Mode

In this mode, the resistance of the capacitor will influence the end-of-service determination, but this does not impact the accuracy as the overall power delivery to the system is determined by the total resistance of the combined battery and capacitor. However, for the resistance to be updated to support the end-of-service feature, there needs to be a large enough delta in voltage between the open circuit voltage and the voltage under load. As the battery is discharged, the resistance increases and so the resistance at a state of charge of < 50% is the most important so that the accuracy will be optimized as the battery is in the second half of its service life.

The minimum delta voltage should be 100 mV to ensure there is no impact to the accuracy; therefore, the high load pulse current when the gauge is active should be:

High Load Pulse Current (mA) = 100 mV / Resistance of the battery and capacitor in parallel at 50% SOC.
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