JAJSM08B December   2022  – August 2024 TPS281C30

PRODUCTION DATA  

  1.   1
  2. 1 特長
  3. 2 アプリケーション
  4. 3 概要
  5. 4 Device Comparison Table
  6. 5 Pin Configuration and Functions
  7. 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 SNS Timing Characteristics
    7. 6.7 Switching Characteristics
    8. 6.8 Typical Characteristics
  8. 7 Parameter Measurement Information
  9. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Device Functional Modes
      1. 8.3.1 Working Mode
    4. 8.4 Feature Description
      1. 8.4.1 Accurate Current Sense
        1. 8.4.1.1 High Accuracy Sense Mode
      2. 8.4.2 Programmable Current Limit
        1. 8.4.2.1 Short-Circuit and Overload Protection
        2. 8.4.2.2 Capacitive Charging
      3. 8.4.3 Inductive-Load Switching-Off Clamp
      4. 8.4.4 Inductive Load Demagnetization
      5. 8.4.5 Full Protections and Diagnostics
        1. 8.4.5.1 Open-Load Detection
        2. 8.4.5.2 Thermal Protection Behavior
        3. 8.4.5.3 Undervoltage Lockout (UVLO) Protection
        4. 8.4.5.4 Overvoltage (OVP) Protection
        5. 8.4.5.5 Reverse Polarity Protection
        6. 8.4.5.6 Protection for MCU I/Os
        7. 8.4.5.7 Diagnostic Enable Function
        8. 8.4.5.8 Loss of Ground
        9. 8.4.5.9 Enhanced EFT Immunity
  10. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
        1. 9.2.1.1 IEC 61000-4-5 Surge
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Selecting RILIM
        2. 9.2.2.2 Selecting RSNS
    3. 9.3 Power Supply Recommendations
    4. 9.4 Layout
      1. 9.4.1 Layout Guidelines
        1. 9.4.1.1 EMC Considerations
      2. 9.4.2 Layout Example
        1. 9.4.2.1 PWP Layout without a GND Network
        2. 9.4.2.2 PWP Layout with a GND Network
        3. 9.4.2.3 RGW Layout with a GND Network
      3. 9.4.3 Thermal Considerations
  11. 10Device and Documentation Support
    1. 10.1 ドキュメントの更新通知を受け取る方法
    2. 10.2 サポート・リソース
    3. 10.3 Trademarks
    4. 10.4 静電気放電に関する注意事項
    5. 10.5 用語集
  12. 11Revision History
  13. 12Mechanical, Packaging, and Orderable Information

パッケージ・オプション

メカニカル・データ（パッケージ｜ピン）
サーマルパッド・メカニカル・データ
発注情報

8.4.5.7 Diagnostic Enable Function

The diagnostic enable pin, DIAG_EN, offers multiplexing of the microcontroller diagnostic input for current sense or digital status, by sharing the same sense resistor and ADC line or I/O port among multiple devices.

In addition, this pin can be used to manage power dissipation by the device. During the ouput-on period, if no continious sense output diagnositcs are required, the diagnostic disable feature will lower the operating current. On the other hand, the output-off period, the diagnostic disable function lowers the current consumption for the standby condition.

TPS281C30 Resistor sharing Figure 8-20 Resistor sharing