ZHCSQ76 December   2022 TPS25961

PRODUCTION DATA  

  1. 1 特性
  2. 2 应用
  3. 3 说明
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Timing Requirements
    7. 6.7 Switching Characteristics
    8. 6.8 典型特性
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 欠压保护 (UVP) 和欠压锁定 (UVLO)
      2. 7.3.2 Overvoltage Protection
      3. 7.3.3 Inrush Current, Overcurrent and Short Circuit Protection
        1. 7.3.3.1 Slew Rate and Inrush Current Control (dVdt)
        2. 7.3.3.2 Active Current Limiting
        3. 7.3.3.3 Short-Circuit Protection
      4. 7.3.4 Overtemperature Protection (OTP)
      5. 7.3.5 Fault Response
    4. 7.4 Device Functional Modes
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 典型应用
      1. 8.2.1 Adapter input protection for set-top boxes
      2. 8.2.2 Design Requirements
      3. 8.2.3 Detailed Design Procedure
        1. 8.2.3.1 Programming the Current-Limit Threshold: RILM Selection
        2. 8.2.3.2 欠压和过压锁定设定点
        3. 8.2.3.3 Output Voltage Rise Time (tR)
      4. 8.2.4 Application Curves
    3. 8.3 Application Example
      1. 8.3.1 Application Curves
    4. 8.4 Power Supply Recommendations
      1. 8.4.1 瞬态保护
      2. 8.4.2 Output Short-Circuit Measurements
    5. 8.5 Layout
      1. 8.5.1 Layout Guidelines
      2. 8.5.2 Layout Example
  9. 9 Device and Documentation Support
    1. 9.1 Documentation Support
      1. 9.1.1 Related Documentation
    2. 9.2 接收文档更新通知
    3. 9.3 支持资源
    4. 9.4 商标
    5. 9.5 Electrostatic Discharge Caution
    6. 9.6 术语表
  10. 10Mechanical, Packaging, and Orderable Information

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8.3 Application Example

TPS25961 can also be used as a low cost current limiter device replacing discrete PTC for memory card port protection in end equipments like IP camera, Laptop etc. Typical SD cards operate at 3.3-V and draw current less than 100 mA. TPS25961 can be configured for protection in this application without the need for many external components. Keeping OVLO pin grounded and ILIM pin open would set fixed overvoltage protection thresold of 5.98 V and current limit of 115 mA. EN pin can be tied to VIN pin through a pullup resistor. Figure 8-9 shows example layout for TPS25961 for above mentioned configuration, achieved on a single layer board with minimum components.

Figure 8-8 SD card port protection using TPS25961

GUID-20221122-SS0I-T8GQ-NSHZ-DXWFPB5MZXVM-low.gifFigure 8-9 TPS25961 layout example for SD card port protection application