ZHCSLK6B July   2021  – February 2025 TPS1HC100-Q1

PRODUCTION DATA  

  1.   1
  2. 1 特性
  3. 2 应用
  4. 3 说明
  5. 4 Pin Configuration and Functions
    1. 4.1 Recommended Connections for Unused Pins
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 SNS Timing Characteristics
    7. 5.7 Switching Characteristics
    8. 5.8 Typical Characteristics
  7. 6 Parameter Measurement Information
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Accurate Current Sense
      2. 7.3.2 Programmable Current Limit
        1. 7.3.2.1 Capacitive Charging
      3. 7.3.3 Inductive-Load Switching-Off Clamp
      4. 7.3.4 Full Protections and Diagnostics
        1. 7.3.4.1  Short-Circuit and Overload Protection
        2. 7.3.4.2  Open-Load and Short-to-Battery Detection
        3. 7.3.4.3  Short-to-Battery Detection
        4. 7.3.4.4  Reverse-Polarity and Battery Protection
        5. 7.3.4.5  Latch-Off Mode
        6. 7.3.4.6  Thermal Protection Behavior
        7. 7.3.4.7  UVLO Protection
        8. 7.3.4.8  Loss of GND Protection
        9. 7.3.4.9  Loss of Power Supply Protection
        10. 7.3.4.10 Reverse Current Protection
        11. 7.3.4.11 Protection for MCU I/Os
      5. 7.3.5 Diagnostic Enable Function
    4. 7.4 Device Functional Modes
      1. 7.4.1 Working Mode
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Dynamically Changing Current Limit
        2. 8.2.2.2 AEC Q100-012 Test Grade A Certification
        3. 8.2.2.3 EMC Transient Disturbances Test
      3. 8.2.3 Application Curves
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
        1. 8.4.2.1 Without a GND Network
        2. 8.4.2.2 With a GND Network
      3. 8.4.3 Thermal Considerations
  10. 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 Trademarks
    5. 9.5 静电放电警告
    6. 9.6 术语表
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

7.3.4.8 Loss of GND Protection

When loss of GND occurs, output is turned off regardless of whether the input signal is high or low.

Case 1 (loss of device GND): loss of GND protection is active when the thermal pad (Tab), IC_GND, and current limit ground are one trace connected to the system ground, as shown in Figure 7-17.

TPS1HC100-Q1 Loss of Device GND Figure 7-17 Loss of Device GND

Case 2 (loss of module GND): when the whole ECU module GND is lost, protections are also active. At this condition, the load GND remains connected.

TPS1HC100-Q1 Loss of Module GND Figure 7-18 Loss of Module GND