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

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

9.3.7.1 Overcurrent Conditions (All Devices Excluding TPS2051BDBV, TPS2052BD)

Three possible overload conditions can occur for all devices exclude TPS2051BDBV, TPS2052BD. In the first condition, the output has been shorted before the device is enabled or before VI(IN) has been applied (see Figure 7-44 through Figure 7-47). The TPS20xxB senses the short and immediately switches into a constant-current output.

In the second condition, a short or an overload occurs while the device is enabled. At the instant the overload occurs, high currents may flow for a short period of time before the current-limit circuit can react. After the current-limit circuit has tripped (reached the overcurrent trip threshold (IOC)), the device switches into constant-current mode and current is limited at the short-circuit output current threshold (IOS).

In the third condition, the load has been gradually increased beyond the recommended operating current. The current is permitted to rise until the overcurrent trip threshold (IOC) is reached or until the thermal limit of the device is exceeded. The TPS20xxB is capable of delivering current up to the current-limit threshold without damaging the device. Once the overcurrent trip threshold (IOC) has been reached, the device switches into its constant-current mode current is limited at the short-circuit output current threshold (IOS).