ZHCSL91B October   2020  – March 2022 TPS25947

PRODUCTION DATA  

  1. 1 特性
  2. 2 应用
  3. 3 说明
  4. 4 Revision History
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and 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 Timing Requirements
    7. 7.7 Switching Characteristics
      1.      15
    8. 7.8 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  Input Reverse Polarity Protection
      2. 8.3.2  Undervoltage Lockout (UVLO and UVP)
      3. 8.3.3  Overvoltage Lockout (OVLO)
      4. 8.3.4  Overvoltage Clamp (OVC)
      5. 8.3.5  Inrush Current, Overcurrent, and Short Circuit Protection
        1. 8.3.5.1 Slew Rate (dVdt) and Inrush Current Control
        2. 8.3.5.2 Circuit-Breaker
        3. 8.3.5.3 Active Current Limiting
        4. 8.3.5.4 Short-Circuit Protection
      6. 8.3.6  Analog Load Current Monitor
      7. 8.3.7  Reverse Current Protection
      8. 8.3.8  Overtemperature Protection (OTP)
      9. 8.3.9  Fault Response and Indication (FLT)
      10. 8.3.10 Auxiliary Channel Control (AUXOFF)
      11. 8.3.11 Power Good Indication (PG)
    4. 8.4 Device Functional Modes
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Single Device, Self-Controlled
    3. 9.3 Typical Application
      1. 9.3.1 Design Requirements
      2. 9.3.2 Detailed Design Procedure
        1. 9.3.2.1 Device Selection
        2. 9.3.2.2 Setting Undervoltage and Overvoltage Thresholds
        3. 9.3.2.3 Setting Output Voltage Rise Time (tR)
        4. 9.3.2.4 Setting Power Good Assertion Threshold
        5. 9.3.2.5 Setting Overcurrent Threshold (ILIM)
        6. 9.3.2.6 Setting Overcurrent Blanking Interval (tITIMER)
      3. 9.3.3 Application Curves
    4. 9.4 Active ORing
    5. 9.5 Priority Power MUXing
    6. 9.6 USB PD Port Protection
    7. 9.7 Parallel Operation
  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. 12Device and Documentation Support
    1. 12.1 Documentation Support
      1. 12.1.1 Related Documentation
    2. 12.2 接收文档更新通知
    3. 12.3 支持资源
    4. 12.4 Trademarks
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 术语表
  13. 13Mechanical, Packaging, and Orderable Information

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7.6 Timing Requirements

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
tOVLO Overvoltage lock-out response time (TPS259470x/4x) VOVLO > VOV(R) to VOUT↓ 1.2 µs
tOVC Overvoltage clamp response time (TPS259472x) VIN > VOVC to VOUT↓ 5 µs
tCB Circuit-Breaker response time (TPS259474x) IOUT > 1.2 × ILIM & ITIMER expired to IOUT↓ 2 µs
tLIM Current limit response time (TPS259470x/2x) IOUT > 1.2 × ILIM & ITIMER expired to IOUT settling to within 5 % of ILIM 400 µs
tSC Scalable fast-trip response time IOUT > 3 × ILIM to IOUT↓ 500 ns
tFT Fixed fast-trip response time IOUT > IFT to IOUT↓ 500 ns
tRST Auto-Retry Interval after fault (TPS25947xA) 110 ms
tSWOV OVLO fast recovery response time (TPS259470x) VOVLO < VOV(F) to VOUT↑  90 µs
tSWRCB Reverse Current Blocking recovery time (VIN – VOUT) > VFWDTH to VOUT ↑ 50 µs
tRCB Reverse Current Blocking comparator response time (VOUT – VIN) > 1.3 × VREVTH to BFET OFF 1 µs
tPGA PG Assertion de-glitch (TPS259472x/4x) 12 µs
tPGD PG De-assertion de-glitch (TPS259472x/4x) 12 µs