ZHCSGI9 August   2017

PRODUCTION DATA.  

  1. 1 特性
  2. 2 应用
  3. 3 说明
  4. 4 修订历史记录
  5. 5 Pin Configuration and 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  Supply Current
    6. 6.6  Digital Input and Output DC Characteristics
    7. 6.7  LDO Regulator, Wake-up, and Auto-Shutdown DC Characteristics
    8. 6.8  LDO Regulator, Wake-up, and Auto-Shutdown AC Characteristics
    9. 6.9  ADC (Temperature and Cell Measurement) Characteristics
    10. 6.10 Integrating ADC (Coulomb Counter) Characteristics
    11. 6.11 I2C-Compatible Interface Communication Timing
    12. 6.12 SHUTDOWN and WAKE-UP Timing
    13. 6.13 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  Device Configuration
      2. 7.3.2  ALERT Interrupt and SHUTDOWN Wake-up
      3. 7.3.3  Voltage Measurement and Calibration
      4. 7.3.4  Temperature Measurement
      5. 7.3.5  Charging and Termination
      6. 7.3.6  Accumulated Charge Measurement
      7. 7.3.7  Gas Gauging
      8. 7.3.8  Battery Condition Warnings
      9. 7.3.9  Configuration Update
      10. 7.3.10 End-Of-Service Determination
      11. 7.3.11 Battery Level Threshold
      12. 7.3.12 Communications
        1. 7.3.12.1 I2C Interface
        2. 7.3.12.2 I2C Time Out
        3. 7.3.12.3 I2C Command Waiting Time
        4. 7.3.12.4 I2C Clock Stretching
      13. 7.3.13 Additional Data Memory Parameter Descriptions
    4. 7.4 Device Functional Modes
      1. 7.4.1 INITIALIZATION Mode
      2. 7.4.2 NORMAL Mode
      3. 7.4.3 SLEEP Mode
      4. 7.4.4 SHUTDOWN Mode
  8. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Getting Started
    2. 8.2 Typical Applications
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 REGIN Voltage Sense Input
        2. 8.2.2.2 Integrated LDO Capacitor
        3. 8.2.2.3 Sense Resistor Selection
      3. 8.2.3 External Thermistor Support
      4. 8.2.4 Learning Load Enable (LEN) from Host
      5. 8.2.5 I2C
      6. 8.2.6 Temperature Sense
      7. 8.2.7 Application Curves
  9. 9 Power Supply Recommendation
    1. 9.1 Power Supply Decoupling
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11器件和文档支持
    1. 11.1 器件支持
      1. 11.1.1 工具
    2. 11.2 文档支持
      1. 11.2.1 相关文档
    3. 11.3 社区资源
    4. 11.4 商标
    5. 11.5 静电放电警告
    6. 11.6 Glossary
  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

10 Layout

10.1 Layout Guidelines

  • A capacitor of a value of at least 2.2 µF is connected between the REG18 pin and VSS. The capacitor should be placed close to the fuel gauge and have short traces to both the REG18 pin and VSS as shown in bq34210-Q1 Capacitor Layout. This regulator must not be used to provide power for other devices in the system.
  • If the connection between the battery pack and the gauge REGIN pin has the potential to pick up noise, it is required to have a capacitor of at least 1.0 µF connect between the REGIN pin and VSS. Place the capacitor close to the fuel gauge and have short traces to both the REGIN pin and VSS.
  • The SRP and SRN pins should be Kelvin connected to the RSENSE terminals.
  • For the low-side sense resistor:
    • Connect SRP to the battery pack side of RSENSE and SRN to the system side of the RSENSE, as shown in bq34210-Q1 Sense Resistor Layout.
    • Kelvin connect the REGIN pin to the battery PACK+ terminal.

10.2 Layout Example

bq34210-Q1 LayoutRSENSE.gif Figure 8. bq34210-Q1 Sense Resistor Layout
bq34210-Q1 LayoutCaps.gif Figure 9. bq34210-Q1 Capacitor Layout