SNOSDE0A February   2022  – May 2022 LM74502-Q1 , LM74502H-Q1

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  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 Switching Characteristics
    7. 7.7 Typical Characteristics
  8. 8 Parameter Measurement Information
  9. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1 Input Voltage (VS)
      2. 9.3.2 Charge Pump (VCAP)
      3. 9.3.3 Gate Driver (GATE an SRC)
        1. 9.3.3.1 Inrush Current Control
      4. 9.3.4 Enable and Undervoltage Lockout (EN/UVLO)
      5. 9.3.5 Overvoltage Protection (OV)
    4. 9.4 Device Functional Modes
      1. 9.4.1 Shutdown Mode
      2. 9.4.2 Conduction Mode
  10. 10Application and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Application
      1. 10.2.1 Design Requirements
      2. 10.2.2 Detailed Design Procedure
        1. 10.2.2.1 Design Considerations
        2. 10.2.2.2 MOSFET Selection
        3. 10.2.2.3 Overvoltage Protection
        4. 10.2.2.4 Charge Pump VCAP, Input and Output Capacitance
      3. 10.2.3 Selection of TVS Diodes for 12-V Battery Protection Applications
      4. 10.2.4 Selection of TVS Diodes and MOSFET for 24-V Battery Protection Applications
      5. 10.2.5 Application Curves
    3. 10.3 Surge Stopper Using LM74502-Q1, LM74502H-Q1
      1. 10.3.1 VS Capacitance, Resistor R1 and Zener Clamp (DZ)
      2. 10.3.2 Overvoltage Protection
      3. 10.3.3 MOSFET Selection
    4. 10.4 Fast Turn-On and Turn-Off High Side Switch Driver Using LM74502H-Q1
  11. 11Power Supply Recommendations
  12. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Example
  13. 13Device and Documentation Support
    1. 13.1 Receiving Notification of Documentation Updates
    2. 13.2 Support Resources
    3. 13.3 Trademarks
    4. 13.4 Electrostatic Discharge Caution
    5. 13.5 Glossary
  14. 14Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

10.2.5 Application Curves

GUID-5EC1293C-8335-46EC-BE94-35DEC5369859-low.pngFigure 10-3 ISO 7637-2 Pulse 1
GUID-20220406-SS0I-NJKC-0PHC-GQ0JBPGHG8JW-low.png
Time (40 ms/DIV)
Figure 10-5 Start-up with Input Reverse Voltage (–12 V)
GUID-20220406-SS0I-C3TT-G651-0RHXXKGXHCKZ-low.png
Time (4 ms/DIV)
Figure 10-7 Start-up with 5-A Load
GUID-20220406-SS0I-RXG8-4BLM-HWMQTJGJSL6K-low.png
Time (10 ms/DIV)
Figure 10-9 Overvoltage Recovery
GUID-20220406-SS0I-NWJC-BBPZ-DTLNBPCPB4K2-low.png
Time (2.5 ms/DIV)
Figure 10-4 Response to ISO 7637-2 Pulse 1 (–150 V)
GUID-20220406-SS0I-MZZK-5PGQ-PBC54CFD3CXP-low.png
Time (4 ms/DIV)
Figure 10-6 Start-up with No Load
GUID-20220406-SS0I-QRZK-BMNP-XKX1TN12SDML-low.png
Time (20 ms/DIV)
Figure 10-8 Overvoltage Cutoff Response (37 V)
GUID-20220406-SS0I-XZR7-VGMD-WTB05SWFGSK1-low.png
Time (20 ms/DIV)
Figure 10-10 Overvoltage Clamp Response