ZHCSHV0C June   2017  – April 2018 TPS2595

PRODUCTION DATA.  

  1. 1 特性
  2. 2 应用
  3. 3 说明
    1.     Device Images
      1.      简化原理图
      2.      TPS25953x 过压钳位响应时间
  4. 4 修订历史记录
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and Functions
    1.     Pin 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 Switching Characteristics
    7. 7.7 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 Undervoltage Protection (UVP) and Undervoltage Lockout (UVLO)
      2. 8.3.2 Overvoltage Protection
        1. 8.3.2.1 Overvoltage Lockout (OVLO)
        2. 8.3.2.2 Overvoltage Clamp (OVC)
      3. 8.3.3 Inrush Current, Overcurrent and Short Circuit Protection
        1. 8.3.3.1 Slew Rate and Inrush Current Control (dVdt)
        2. 8.3.3.2 Active Current Limiting
        3. 8.3.3.3 Short Circuit Protection
      4. 8.3.4 Overtemperature Protection (OTP)
      5. 8.3.5 Fault Indication (FLT )
      6. 8.3.6 Quick Output Discharge (QOD)
    4. 8.4 Device Functional Modes
      1. 8.4.1 Enable and Fault Pin Functional Mode 1: Single Device, Self-Controlled
      2. 8.4.2 Enable and Fault Pin Functional Mode 2: Single Device, Host-Controlled
      3. 8.4.3 Enable and Fault Pin Functional Mode 2: Multiple Devices, Self-Controlled
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Programming the Current-Limit Threshold: RILM Selection
        2. 9.2.2.2 Undervoltage Lockout Set Point
        3. 9.2.2.3 Setting Output Voltage Ramp Time (TdVdT)
          1. 9.2.2.3.1 Case 1: Start-Up Without Load. Only Output Capacitance COUT Draws Current
          2. 9.2.2.3.2 Case 2: Start-Up With Load. Output Capacitance COUT and Load Draw Current
      3. 9.2.3 Support Component Selection: CIN
      4. 9.2.4 Application Curves
      5. 9.2.5 Controlled Power Down (Quick Output Discharge) using TPS2595x5
      6. 9.2.6 Overvoltage Lockout using TPS259573
  10. 10Power Supply Recommendations
    1. 10.1 Transient Protection
    2. 10.2 Output Short-Circuit Measurements
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12器件和文档支持
    1. 12.1 文档支持
      1. 12.1.1 相关文档
      2. 12.1.2 相关链接
    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 术语表
  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

9.2.5 Controlled Power Down (Quick Output Discharge) using TPS2595x5

When the TPS2595x5 device is disabled, the output voltage is left floating and the power-down profile is entirely dictated by the load. In some applications, this can lead to undesired activity because the load is not powered down to a defined state. Controlled output discharge can ensure the load is completely turned off and is not in an undefined operational state. The QOD pin in the TPS2595x5 device can be connected to the OUT pin to facilitate the Quick Output Discharge function, as shown in Figure 62. When the TPS2595x5 device is disabled, the QOD pin is pulled low and provides a quick discharge path for the output capacitor. The output voltage discharge rate is dictated by the output capacitor COUT, the total discharge path resistance (internal plus external), and the load.

TPS2595 tps2595x-circuit-implementation-with-quick-output-discharge-function-block-diagram.gifFigure 62. Circuit Implementation with Quick Output Discharge Function using TPS2595x5
TPS2595 tps2595x-output-voltage-discharge-using-tps259535-without-qod-scope-shot.gifFigure 63. Output Voltage Discharge using TPS259535 without QOD [VIN = 5 V, EN = H → L, COUT = 100 µF, RLOAD = 1000 Ω, RQODEXT = OPEN]
TPS2595 tps2595x-output-voltage-discharge-using-tps259535-with-qod-scope-shot.gifFigure 64. Output Voltage Discharge using TPS259535 with QOD [VIN = 5 V, EN = H → L, COUT = 100 µF, RLOAD = 1000 Ω, RQODEXT = Short]