ZHCSBL4A September   2013  – January 2015

PRODUCTION DATA.  

  1. 1 特性
  2. 2 应用
  3. 3 说明
  4. 4 修订历史记录
  5. 5 说明（续）
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Timing Requirements
    7. 7.7 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Device Power Up
        1. 8.3.1.1 Power-On-Reset (POR)
        2. 8.3.1.2 Power Up from Battery without DC Source
          1. 8.3.1.2.1 BATFET Turn Off
          2. 8.3.1.2.2 Shipping Mode
        3. 8.3.1.3 Boost Mode Operation from Battery
          1. 8.3.1.3.1 Integrated Control to Switch Between USB Charge Mode and Boost Mode
        4. 8.3.1.4 Power Up from DC Source
          1. 8.3.1.4.1 REGN LDO
          2. 8.3.1.4.2 Input Source Qualification
          3. 8.3.1.4.3 Input Current Limit Detection
          4. 8.3.1.4.4 D+/D- Detection Sets Input Current Limit
          5. 8.3.1.4.5 Force Input Current Limit Detection
        5. 8.3.1.5 Converter Power-Up
        6. 8.3.1.6 Low Power HIZ State
      2. 8.3.2 Power Path Management
        1. 8.3.2.1 Narrow VDC Architecture
        2. 8.3.2.2 Dynamic Power Management
        3. 8.3.2.3 Supplement Mode
      3. 8.3.3 Battery Charging Management
        1. 8.3.3.1 Autonomous Charging Cycle
        2. 8.3.3.2 Battery Charging Profile
        3. 8.3.3.3 Thermistor Qualification
          1. 8.3.3.3.1 Cold/Hot Temperature Window
        4. 8.3.3.4 Charging Termination
          1. 8.3.3.4.1 Termination When REG02[0] = 1
        5. 8.3.3.5 Charging Safety Timer
          1. 8.3.3.5.1 Safety Timer Configuration Change
      4. 8.3.4 Status Outputs (STAT, and INT)
        1. 8.3.4.1 Charging Status Indicator (STAT)
        2. 8.3.4.2 Interrupt to Host (INT)
      5. 8.3.5 Protections
        1. 8.3.5.1 Input Current Limit on ILIM
        2. 8.3.5.2 Thermal Regulation and Thermal Shutdown
        3. 8.3.5.3 Voltage and Current Monitoring in Buck Mode
          1. 8.3.5.3.1 Input Over-Voltage (ACOV)
          2. 8.3.5.3.2 System Over-Voltage Protection (SYSOVP)
        4. 8.3.5.4 Current Monitoring in Boost Mode
        5. 8.3.5.5 Battery Protection
          1. 8.3.5.5.1 Battery Over-Voltage Protection (BATOVP)
          2. 8.3.5.5.2 Battery Short Protection
          3. 8.3.5.5.3 System Over-Current Protection
    4. 8.4 Device Functional Modes
      1. 8.4.1 Host Mode and Default Mode
    5. 8.5 Programming
      1. 8.5.1 Serial Interface
        1. 8.5.1.1 Data Validity
        2. 8.5.1.2 START and STOP Conditions
        3. 8.5.1.3 Byte Format
        4. 8.5.1.4 Acknowledge (ACK) and Not Acknowledge (NACK)
        5. 8.5.1.5 Slave Address and Data Direction Bit
          1. 8.5.1.5.1 Single Read and Write
          2. 8.5.1.5.2 Multi-Read and Multi-Write
    6. 8.6 Register Map
      1. 8.6.1 I2C Registers
        1. 8.6.1.1  Input Source Control Register REG00 [reset = 01011000, or 58]
        2. 8.6.1.2  Power-On Configuration Register REG01 [reset = 00011011, or 0x1B]
        3. 8.6.1.3  Charge Current Control Register REG02 [reset = 00100000, or 0x20]
        4. 8.6.1.4  Pre-Charge/Termination Current Control Register REG03 [reset = 00010001, or 0x11]
        5. 8.6.1.5  Charge Voltage Control Register REG04 [reset = 10110010, or 0xB2]
        6. 8.6.1.6  Charge Termination/Timer Control Register REG05 [reset = 10011100, or 0x9C]
        7. 8.6.1.7  Boost Voltage/Thermal Regulation Control Register REG06 [reset = 10010011, or 0x93]
        8. 8.6.1.8  Misc Operation Control Register REG07 [reset = 01001011, or 4B]
        9. 8.6.1.9  System Status Register REG08
        10. 8.6.1.10 New Fault Register REG09
        11. 8.6.1.11 Vender / Part / Revision Status Register REG0A
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Inductor Selection
        2. 9.2.2.2 Input Capacitor
        3. 9.2.2.3 Output Capacitor
      3. 9.2.3 Application Performance Plots
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12器件和文档支持
    1. 12.1 文档支持
      1. 12.1.1 相关文档　
    2. 12.2 商标
    3. 12.3 静电放电警告
    4. 12.4 术语表
  13. 13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

1 特性

  • 90% 高效开关模式 3A 充电器
  • 3.9V 至 6.2V 单输入 USB 标准充电器，提供 6.4V 过压保护
    • 与 USB 电池充电器技术规格 (BC1.2) 兼容的 USB 主机或充电端口 D+/D- 检测
    • 支持非标准 2A/1A 适配器检测
    • 输入电压和电流限制支持 USB2.0 和 USB 3.0
    • 输入电流限值：100mA，150mA，500mA，900mA，1A，1.5A，2A 和 3A
  • 电池升压模式同步升压转换器，具有以下特性
    • 1.5A 时可调输出电压范围为 4.55V 至 5.5V
    • 5.1V 升压模式效率为 90%
    • 快速 OTG 启动（典型值 22ms）
  • 窄范围 VDC (NVDC) 电源路径管理
    • 在无电池或深度电池放电时的即时系统启动
    • 电池充电模式中的理想二极管运行
  • 薄型 1.2mm 电感 1.5MHz 开关频率
  • I2C 端口用于实现最优系统性能和状态报告
  • 具有或不具有主机管理的自主电池充电
    • 电池充电使能
    • 电池充电预调节
    • 充电终止和再充电
  • 高精度
    • 充电电压调节范围为 ±0.5%
    • 充电电流调节范围为 ±7%
    • 输入电流调节范围为 ±7.5%
    • 升压模式下 ±3% 输出电压调节范围
  • 高集成
    • 电源路径管理
    • 同步开关 MOSFET
    • 集成电流感测
    • 阴极负载二极管
    • 内部环路补偿
  • 安全性
    • 针对升压模式中充电和放电的电池温度感测
    • 电池充电安全定时器
    • 热调节和热关断
    • 输入和系统过压保护
    • MOSFET 过流保护
  • 针对 LED 或主机处理器的充电状态输出
  • 通过输入电压调节实现最大功率跟踪能力
  • 20µA 低电池泄漏电流，支持运输模式
  • 4mm x 4mm 紧凑型超薄四方扁平无引线 (VQFN)-24 封装

2 应用

  • 用于智能手机、平板电脑的续航移动电源
  • 便携式媒体播放器
  • 互联网器件

3 说明

bq24295 是一款高度集成开关模式电池充电管理和系统电源路径管理器件，此器件用于广泛续航移动电源、平板电脑和其他便携式器件应用中的单节锂离子和锂聚合物电池。

器件信息(1)

器件型号 封装 封装尺寸（标称值）
bq24295 VQFN (24) 4.00mm x 4.00mm
  1. 如需了解所有可用封装，请见数据表末尾的可订购产品附录。

bq24295 具有 USB D+/D- 检测功能且用于升压模式充电和放电

bq24295 app_diag_lusbc1.gif

4 修订历史记录

Changes from * Revision (September 2013) to A Revision

  • Added ESD 额定值表，特性描述部分，器件功能模式，应用和实施部分，电源相关建议部分，布局部分，器件和文档支持部分以及机械、封装和可订购信息部分。Go
  • Changed bq24295 具有 USB D+/D- 检测功能且用于升压模式充电和放电中的 5.52kΩ，现为 5.25kΩGo
  • Changed 整个数据表内的 Power Pad，现为散热焊盘Go
  • Changed REG01[5] to REG01[5] = 1 in OTG descriptionGo
  • Added (10k NTC thermistor only) to QON descriptionGo
  • Changed ICHG = 1792 mA in IICHG_REG_ACC test conditionsGo
  • Changed falling to rising and TYP to 47.2% in VHTF in Electrical CharacteristicsGo
  • Added VIH_OTG to Electrical CharacteristicsGo
  • Deleted wavefroms from Typical Characteristics and added to Application Performance PlotsGo
  • Changed Table 3Go
  • Added paragraph after Table 3Go
  • Changed Figure 15Go
  • Changed from 2048 mA to 1024 mA in Table 5Go
  • Changed RT1 = 5.25 kΩ Go
  • Deleted and LSFET from Voltage and Current Monitoring in Buck Mode descriptionGo
  • Changed REG09[5] to REG09[3] in Battery Over-Voltage Protection (BATOVP) sectionGo
  • Changed reset = 01100000, or 60 to reset = 00100000, or 0x20 for REG02Go
  • Changed Default: 2048 mA (011000) to Default: 1024mA (001000) for bits [7:2] in REG02Go
  • Changed reset = 10011010, or 0x9A to reset = 10011100, or 0x9C for REG05Go
  • Changed 0 to 1 for REG05 Bit 2 Reset Go
  • Changed 1 to 0 for REG05 Bit 1 ResetGo
  • Changed REG09 Bit 3 description 1 – Battery OVP Go
  • Changed paragraph in Application InformationGo
  • Changed 5.52kΩ to 5.25kΩ in Figure 40Go