ZHCSEW9B March   2016  – October 2017

PRODUCTION DATA.  

  1. 特性
  2. 应用
  3. 说明
  4. 修订历史记录
  5. Pin Configuration and Functions
  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  Electrical Characteristics: Supply Current
    6. 6.6  Electrical Characteristics: Power Supply Control
    7. 6.7  Electrical Characteristics: AFE Power-On Reset
    8. 6.8  Electrical Characteristics: AFE Watchdog Reset and Wake Timer
    9. 6.9  Electrical Characteristics: Current Wake Comparator
    10. 6.10 Electrical Characteristics: VC1, VC2, VC3, VC4, BAT, PACK
    11. 6.11 Electrical Characteristics: SMBD, SMBC
    12. 6.12 Electrical Characteristics: PRES, BTP_INT, DISP
    13. 6.13 Electrical Characteristics: LEDCNTLA, LEDCNTLB, LEDCNTLC
    14. 6.14 Electrical Characteristics: Coulomb Counter
    15. 6.15 Electrical Characteristics: CC Digital Filter
    16. 6.16 Electrical Characteristics: ADC
    17. 6.17 Electrical Characteristics: ADC Digital Filter
    18. 6.18 Electrical Characteristics: CHG, DSG FET Drive
    19. 6.19 Electrical Characteristics: PCHG FET Drive
    20. 6.20 Electrical Characteristics: FUSE Drive
    21. 6.21 Electrical Characteristics: Internal Temperature Sensor
    22. 6.22 Electrical Characteristics: TS1, TS2, TS3, TS4
    23. 6.23 Electrical Characteristics: PTC, PTCEN
    24. 6.24 Electrical Characteristics: Internal 1.8-V LDO
    25. 6.25 Electrical Characteristics: High-Frequency Oscillator
    26. 6.26 Electrical Characteristics: Low-Frequency Oscillator
    27. 6.27 Electrical Characteristics: Voltage Reference 1
    28. 6.28 Electrical Characteristics: Voltage Reference 2
    29. 6.29 Electrical Characteristics: Instruction Flash
    30. 6.30 Electrical Characteristics: Data Flash
    31. 6.31 Electrical Characteristics: OCD, SCC, SCD1, SCD2 Current Protection Thresholds
    32. 6.32 Timing Requirements: OCD, SCC, SCD1, SCD2 Current Protection Timing
    33. 6.33 Timing Requirements: SMBus
    34. 6.34 Timing Requirements: SMBus XL
    35. 6.35 Typical Characteristics
  7. Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  Primary (1st Level) Safety Features
      2. 7.3.2  Secondary (2nd Level) Safety Features
      3. 7.3.3  Charge Control Features
      4. 7.3.4  Gas Gauging
      5. 7.3.5  Configuration
        1. 7.3.5.1 Oscillator Function
        2. 7.3.5.2 System Present Operation
        3. 7.3.5.3 Emergency Shutdown
        4. 7.3.5.4 1-Series, 2-Series, 3-Series, or 4-Series Cell Configuration
        5. 7.3.5.5 Cell Balancing
      6. 7.3.6  Battery Parameter Measurements
        1. 7.3.6.1 Charge and Discharge Counting
      7. 7.3.7  Battery Trip Point (BTP)
      8. 7.3.8  Lifetime Data Logging Features
      9. 7.3.9  Authentication
      10. 7.3.10 LED Display
      11. 7.3.11 Voltage
      12. 7.3.12 Current
      13. 7.3.13 Temperature
      14. 7.3.14 Communications
        1. 7.3.14.1 SMBus On and Off State
        2. 7.3.14.2 SBS Commands
    4. 7.4 Device Functional Modes
  8. Applications 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 High-Current Path
          1. 8.2.2.1.1 Protection FETs
          2. 8.2.2.1.2 Chemical Fuse
          3. 8.2.2.1.3 Lithium-Ion Cell Connections
          4. 8.2.2.1.4 Sense Resistor
          5. 8.2.2.1.5 ESD Mitigation
        2. 8.2.2.2 Gas Gauge Circuit
          1. 8.2.2.2.1 Coulomb-Counting Interface
          2. 8.2.2.2.2 Power Supply Decoupling and PBI
          3. 8.2.2.2.3 System Present
          4. 8.2.2.2.4 SMBus Communication
          5. 8.2.2.2.5 FUSE Circuitry
        3. 8.2.2.3 Secondary-Current Protection
          1. 8.2.2.3.1 Cell and Battery Inputs
          2. 8.2.2.3.2 External Cell Balancing
          3. 8.2.2.3.3 PACK and FET Control
          4. 8.2.2.3.4 Temperature Output
          5. 8.2.2.3.5 LEDs
          6. 8.2.2.3.6 Safety PTC Thermistor
      3. 8.2.3 Application Curves
  9. Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
      1. 10.1.1 Protector FET Bypass and Pack Terminal Bypass Capacitors
      2. 10.1.2 ESD Spark Gap
    2. 10.2 Layout Example
  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 社区资源
    3. 11.3 商标
    4. 11.4 静电放电警告
    5. 11.5 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

特性

  • 高侧保护 N 通道 FET 驱动器可在故障期间实现串行总线通信
  • 采用内部旁路的电池均衡功能可优化电池健康状况
  • 用于故障分析的诊断使用寿命数据监控器和黑盒记录器
  • 全面的可编程保护 特性:电压、电流和温度
  • JEITA 充电算法支持智能充电
  • 具有双路独立模数转换器 (ADC) 的模拟前端
    • 同步电流和电压采样
    • 高精度库伦计数器,输入偏移误差 < 1µV(典型值)
  • 支持电池跳变点 (BTP) 功能,用于 Windows®集成
  • LED 显示屏用于充电状态和电池状态指示
  • 适用于编程和数据访问的 100KHz SMBus 1.1 版通信接口,具有 400KHz 交替模式
  • SHA-1 认证响应器,用于提高电池组安全性
  • 紧凑型 32 引脚 VQFN 封装 (RSM)

应用

  • 笔记本电脑
  • 医疗与测试设备
  • 便携式仪表
  • 无线真空吸尘器和扫地机器人

说明

德州仪器 (TI) 的 bq4050 器件采用补偿放电终止电压 (CEDV) 技术,是一款高度集成的高精度 1-4 节电池电量测量仪表和保护解决方案,可实现自主的充电器控制和电池平衡。

bq4050 器件提供一个基于电池组的完全集成式解决方案,该解决方案具备闪存可编程的定制精简指令集 CPU (RISC)、安全保护以及身份验证,适用于锂离子和锂聚合物电池组。

bq4050 电量测量仪表通过一个与 SMBus 兼容的接口进行通信,并将超低功耗的高速 TI bqBMP 处理器、高精度模拟测量功能、集成式闪存存储器、一组外设和通信端口、N 通道 FET 驱动以及 SHA-1 身份验证变换响应器,融合为一个完整的高性能电池管理解决方案。

器件信息(1)

器件型号 封装 封装尺寸(标称值)
bq4050 VQFN (32) 4.00mm x 4.00mm
  1. 如需了解所有可用封装,请见产品说明书末尾的可订购产品附录。

简化电路原理图

bq4050 Simp_Schematic.gif