ZHCSFC3A July   2016  – August 2016

PRODUCTION DATA.  

  1. 1 特性
  2. 2 应用范围
  3. 3 说明
  4. 4 修订历史记录
  5. 5 Device Comparison Table
  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 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  Dynamic Rectifier Control
      2. 8.3.2  Dynamic Power Scaling
      3. 8.3.3  VO_REG and VIREG Calculations
      4. 8.3.4  RILIM Calculations
      5. 8.3.5  Adapter Enable Functionality
      6. 8.3.6  Turning Off the Transmitter
        1. 8.3.6.1 WPC End Power Transfer (EPT)
        2. 8.3.6.2 PMA EOC
      7. 8.3.7  CM_ILIM
      8. 8.3.8  PD_DET and TMEM
      9. 8.3.9  TS, Both WPC and PMA
      10. 8.3.10 I2C Communication
      11. 8.3.11 Input Overvoltage
    4. 8.4 Device Functional Modes
    5. 8.5 Register Maps
      1. 8.5.1  Wireless Power Supply Current Register 1 (address = 0x01) [reset = 00000001]
      2. 8.5.2  Wireless Power Supply Current Register 2 (address = 0x02) [reset = 00000111 ]
      3. 8.5.3  I2C Mailbox Register (address = 0xE0) [reset = 10000000 ]
      4. 8.5.4  Wireless Power Supply FOD RAM Register (address = 0xE1) [reset =00000000 ]
      5. 8.5.5  Wireless Power User Header RAM Register (address = 0xE2) [reset = 00000000]
      6. 8.5.6  Wireless Power USER VRECT Status RAM Register (address = 0xE3) [reset = 00000000]
      7. 8.5.7  Wireless Power VOUT Status RAM Register (address = 0xE4) [reset = 00000000]
      8. 8.5.8  Wireless Power REC PWR Byte Status RAM Register (address = 0xE8) [reset = 00000000]
      9. 8.5.9  Wireless Power Mode Indicator Register (address = 0xEF) [reset = 00000000]
      10. 8.5.10 Wireless Power Prop Packet Payload RAM Byte 0 Register (address = 0xF1) [reset = 00000000]
      11. 8.5.11 Wireless Power Prop Packet Payload RAM Byte 1 Register (address = 0xF2) [reset = 00000000]
      12. 8.5.12 Wireless Power Prop Packet Payload RAM Byte 2 Register (address = 0xF3) [reset = 00000000]
      13. 8.5.13 Wireless Power Prop Packet Payload RAM Byte 3 Register (address = 0xF4) [reset = 00000000]
      14. 8.5.14 RXID Readback Register (address = 0xF5 - 0xFA) [reset = see note]
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      1. 9.2.1 Dual Mode Design (WPC and PMA Compliant) Power Supply 5-V Output with 1-A Maximum Current
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
          1. 9.2.1.2.1  Output Voltage Set Point
          2. 9.2.1.2.2  Output and Rectifier Capacitors
            1. 9.2.1.2.2.1 TMEM
          3. 9.2.1.2.3  Maximum Output Current Set Point
          4. 9.2.1.2.4  TERM Resistor
          5. 9.2.1.2.5  Setting LPRB1 and LPRB2 Resistors
          6. 9.2.1.2.6  I2C
          7. 9.2.1.2.7  Communication Current Limit
          8. 9.2.1.2.8  Receiver Coil
          9. 9.2.1.2.9  Series and Parallel Resonant Capacitors
          10. 9.2.1.2.10 Communication, Boot and Clamp Capacitors
        3. 9.2.1.3 Application Curves
      2. 9.2.2 Embedded in System Board
      3. 9.2.3 bq51222 Implemented in Back Cover
  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 器件支持
      1. 12.1.1 Third-Party Products Disclaimer
    2. 12.2 接收文档更新通知
    3. 12.3 社区资源
    4. 12.4 商标
    5. 12.5 静电放电警告
    6. 12.6 Glossary
  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

  • 稳健的 5W 解决方案，热损耗降低 50%，从而提高热性能
    • 针对最薄解决方案的无电感器接收器
    • 可调节输出电压（4.5 至 8V），以实现线圈和热性能优化
    • 效率高达 96% 的完全同步整流器
    • 后置调节器的效率达 97%
    • 5 W 时系统效率达 79%
  • 与 WPC v1.2 和 PMA 标准兼容的通信
  • 已获专利的发送器焊盘检测功能提升了用户体验
  • 与主机进行I2C通信

2 应用范围

  • 智能手机、平板电脑和头戴式耳机
  • Wi-Fi 热点
  • 移动电源
  • 其他手持式器件

3 说明

bq51222 器件是一款装备齐全的无线电源接收器，此接收器能够以无线充电联盟 (WPC) Qi 和电源事物联盟 (PMA) 协议运行，这使得无线电源系统满足这两种感应充电标准。bq51222 器件提供针对这两种标准的单器件电源转换（整流和稳压）以及数字控制和通信。它还具有协议自主检测功能，并且无需额外的有源器件。bq51222 器件符合 WPC v1.2 和 PMA 通信协议。与 WPC 或 PMA 一次侧控制器搭配使用时，bq51222 器件可为无线电源解决方案实现一套完整的无线电源传输系统。此接收器可采用市场领先的封装、效率和解决方案实现同步整流、稳压和控制与通信。

器件信息(1)

器件型号 封装 封装尺寸（最大值）
bq51222 DSBGA (42) 3.586mm x 2.874mm
  1. 要了解所有可用封装，请参见数据表末尾的可订购产品附录。

空白

简化原理图

bq51222 fp_simple_schem_sluscl5.gif

双路模式效率（5V 输出）

bq51222 D008_SLUSBS9.gif