ZHCSJV7D July   2005  – June 2019 TPS40190

PRODUCTION DATA.  

  1. 1 特性
  2. 2 应用
  3. 3 说明
    1.     Device Images
      1.      简化应用示意图
  4. 4 修订历史记录
  5. 5 Pin Configuration and Functions
    1.     Pin Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 Dissipation Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Electrical Characteristics
    5. 6.5 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Internally Fixed Parameters
      2. 7.3.2 Output Short Circuit Protection
      3. 7.3.3 Enable Functionality
      4. 7.3.4 5-V Regulator
      5. 7.3.5 Startup Sequence and Timing
      6. 7.3.6 Prebias Outputs
  8. 8 Application and Implementation
    1. 8.1 Typical Applications
  9. 9 器件和文档支持
    1. 9.1 文档支持
      1. 9.1.1 相关文档
    2. 9.2 接收文档更新通知
    3. 9.3 社区资源
    4. 9.4 商标
    5. 9.5 静电放电警告
    6. 9.6 Glossary
  10. 10机械、封装和可订购信息

封装选项

请参考 PDF 数据表获取器件具体的封装图。

机械数据 (封装 | 引脚)
  • DRC|10
散热焊盘机械数据 (封装 | 引脚)
订购信息

7.3.5 Startup Sequence and Timing

The TPS40190 startup sequence is as follows. After input power is applied, the 5-V onboard regulator comes up. Once this regulator comes up, the TPS40190 goes through a period where it samples the impedance at the COMP pin and decides the short circuit protection threshold voltage. This is accomplished by placing 400 mV on the COMP pin for approximately 2 ms. During this time, the current is measured and compared against internal thresholds to select the short circuit protection threshold. After this, the COMP pin is brought low for 4 ms. This ensures that the feedback loop is preconditioned at startup and no sudden output rise occurs at the output of the converter when the converter is allowed to start switching. After these initial 6 milliseconds, the internal soft-start circuitry is engaged and the converter is allowed to start. See Figure 27.