JAJSOX6 October   2023 LM74930-Q1

PRODUCTION DATA  

  1.   1
  2. 1 特長
  3. 2 アプリケーション
  4. 3 概要
  5. 4 Revision History
  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 Switching Characteristics
    7. 6.7 Typical Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  Charge Pump
      2. 7.3.2  Dual Gate Control (DGATE, HGATE)
        1. 7.3.2.1 Load Disconnect Switch Control (HGATE, OUT)
        2. 7.3.2.2 Reverse Battery Protection (A, C, DGATE)
      3. 7.3.3  Overcurrent Protection (CS+, CS-, ILIM, IMON, TMR)
      4. 7.3.4  Overcurrent Protection with Circuit Breaker (ILIM, TMR)
      5. 7.3.5  Overcurrent Protection With Latch-Off
      6. 7.3.6  Short-Circuit Protection (ISCP)
        1. 7.3.6.1 Device Wake-Up With Output Short-Circuit Condition
      7. 7.3.7  Analog Current Monitor Output (IMON)
      8. 7.3.8  Overvoltage and Undervoltage Protection (OV, UVLO, OVCLAMP)
      9. 7.3.9  Disabling Reverse Current Blocking Functionality (MODE)
      10. 7.3.10 Device Functional Modes
        1. 7.3.10.1 Low Quiescent Current Shutdown Mode (EN)
  9. 8 Applications and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application: 200-V Unsuppressed Load Dump Protection Application
      1. 8.2.1 Design Requirements for 200-V Unsuppressed Load Dump Protection
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1  VS Capacitance, Resistor R1 and Zener Clamp (DZ)
        2. 8.2.2.2  Charge Pump Capacitance VCAP
        3. 8.2.2.3  Input and Output Capacitance
        4. 8.2.2.4  Overvoltage and Undervoltage Protection Component Selection
        5. 8.2.2.5  Selection of Scaling Resistor (RSET) and Short-Circuit Protection Setting Resistor (RSCP)
        6. 8.2.2.6  Overcurrent Limit (ILIM), Circuit Breaker Timer (TMR), and Current Monitoring Output (IMON) Selection
        7. 8.2.2.7  Selection of Current Sense Resistor, RSNS
        8. 8.2.2.8  Hold-Up Capacitance
        9. 8.2.2.9  MOSFET Q1 Selection
        10. 8.2.2.10 MOSFET Q2 Selection
        11. 8.2.2.11 Input TVS Selection
      3. 8.2.3 Application Curves
    3. 8.3 Best Design Practices
    4. 8.4 Power Supply Recommendations
      1. 8.4.1 Transient Protection
      2. 8.4.2 TVS Selection for 12-V Battery Systems
      3. 8.4.3 TVS Selection for 24-V Battery Systems
    5. 8.5 Layout
      1. 8.5.1 Layout Guidelines
      2. 8.5.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 ドキュメントの更新通知を受け取る方法
    2. 9.2 サポート・リソース
    3. 9.3 Trademarks
    4. 9.4 静電気放電に関する注意事項
    5. 9.5 用語集
  11. 10Mechanical, 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

8.2.1 Design Requirements for 200-V Unsuppressed Load Dump Protection

Table 8-1 Design Parameters - 24-V Unsuppressed Load Dump Protection
DESIGN PARAMETER EXAMPLE VALUE
Operating input voltage range 12-V/24-V battery, 200-V unsuppressed load lump
Output power 45 W
Output current range 3-A nominal, 5-A peak
Input capacitance 0.1-µF minimum
Output capacitance 0.1-µF minimum, 100-µF typical hold-up capacitance
Overvoltage cut-off / clamp threshold 37.0 V
Overcurrent limit

5 A
Short-circuit limit

20 A
Automotive transient immunity compliance ISO 7637-2 and ISO 16750-2 including 200-V unsuppressed load dump Pulse 5 A