JAJS253N june   2010  – july 2023 TPS2041B , TPS2042B , TPS2043B , TPS2044B , TPS2051B , TPS2052B , TPS2053B , TPS2054B

PRODUCTION DATA  

  1.   1
  2. 1 特長
  3. 2 アプリケーション
  4. 3 概要
  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 ドキュメントの更新通知を受け取る方法
    2. 13.2 Related Links
    3. 13.3 サポート・リソース
    4. 13.4 Trademarks
    5. 13.5 静電気放電に関する注意事項
    6. 13.6 用語集
  15. 14Mechanical, Packaging, and Orderable Information

パッケージ・オプション

メカニカル・データ（パッケージ｜ピン）
サーマルパッド・メカニカル・データ
発注情報

9.3.7.2 Overcurrent Conditions (TPS2051BDBV, TPS2052BD)

Three possible overload conditions can occur for 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 short-circuit output current threshold (IOS) is reached, the device switches into constant-current mode.

In the third condition, the load has been gradually increased beyond the recommended operating current. After the short-circuit output current threshold (IOS) is reached, the device switches into constant-current mode.