ZHCSSK0N june   2010  – july 2023 TPS2041B , TPS2042B , TPS2043B , TPS2044B , TPS2051B , TPS2052B , TPS2053B , TPS2054B

PRODUCTION DATA  

  1.   1
  2. 1 特性
  3. 2 应用
  4. 3 说明
  5. 4 Revision History
  6. 5 General Switch Catalog
  7. 6 Pin Configuration and Functions
  8. 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 Dissipation Ratings
    7. 7.7 Typical Characteristics (All Devices Excluding TPS2051BDBV and TPS2052BD)
    8. 7.8 Typical Characteristics (TPS2051BDBV and TPS2052BD)
  9. 8 Parameter Measurement Information
  10. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagrams
    3. 9.3 Feature Description
      1. 9.3.1  Power Switch
      2. 9.3.2  Charge Pump
      3. 9.3.3  Driver
      4. 9.3.4  Enable ( ENx)
      5. 9.3.5  Enable (ENx)
      6. 9.3.6  Current Sense
      7. 9.3.7  Overcurrent
        1. 9.3.7.1 Overcurrent Conditions (All Devices Excluding TPS2051BDBV, TPS2052BD)
        2. 9.3.7.2 Overcurrent Conditions (TPS2051BDBV, TPS2052BD)
      8. 9.3.8  Overcurrent ( OCx)
      9. 9.3.9  Thermal Sense
      10. 9.3.10 Undervoltage Lockout
    4. 9.4 Device Functional Modes
  11. 10Application and Implementation
    1. 10.1 Application Information
      1. 10.1.1 Universal Serial Bus (USB) Applications
    2. 10.2 Typical Application
      1. 10.2.1 Typical Application (TPS2042B)
        1. 10.2.1.1 Design Requirements
        2. 10.2.1.2 Detailed Design Procedure
          1. 10.2.1.2.1 Power-Supply Considerations
          2. 10.2.1.2.2 OC Response
        3. 10.2.1.3 Application Curves
      2. 10.2.2 Host and Self-Powered and Bus-Powered Hubs
        1. 10.2.2.1 Design Requirements
          1. 10.2.2.1.1 USB Power-Distribution Requirements
        2. 10.2.2.2 Detailed Design Procedure
          1. 10.2.2.2.1 Low-Power Bus-Powered and High-Power Bus-Powered Functions
        3. 10.2.2.3 Application Curves
      3. 10.2.3 Generic Hot-Plug Applications
        1. 10.2.3.1 Design Requirements
        2. 10.2.3.2 Detailed Design Procedure
        3. 10.2.3.3 Application Curves
  12. 11Power Supply Recommendations
    1. 11.1 Undervoltage Lockout (UVLO)
  13. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Example
    3. 12.3 Power Dissipation
    4. 12.4 Thermal Protection
  14. 13Device and Documentation Support
    1. 13.1 接收文档更新通知
    2. 13.2 Related Links
    3. 13.3 支持资源
    4. 13.4 Trademarks
    5. 13.5 静电放电警告
    6. 13.6 术语表
  15. 14Mechanical, Packaging, and Orderable Information

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10.1.1 Universal Serial Bus (USB) Applications

The universal serial bus (USB) interface is a 12-Mb/s, or 1.5-Mb/s, multiplexed serial bus designed for low-to-medium bandwidth PC peripherals (for example, keyboards, printers, scanners, and mice). The four-wire USB interface is conceived for dynamic attach-detach (hot plug-unplug) of peripherals. Two lines are provided for differential data, and two lines are provided for 5-V power distribution.

USB data is a 3.3-V level signal, but power is distributed at 5 V to allow for voltage drops in cases where power is distributed through more than one hub across long cables. Each function must provide its own regulated 3.3 V from the 5-V input or its own internal power supply.

The USB specification defines the following five classes of devices, each differentiated by power-consumption requirements:

  • Hosts and self-powered hubs (SPH)
  • Bus-powered hubs (BPH)
  • Low-power, bus-powered functions
  • High-power, bus-powered functions
  • Self-powered functions

Self-powered and bus-powered hubs distribute data and power to downstream functions. The TPS20xxB can provide power-distribution solutions to many of these classes of devices.