SLVUBU3A April   2020  – October 2020 LM7480-Q1

 

  1.   Trademarks
  2. 1Introduction
    1. 1.1 Features
    2. 1.2 Applications
  3. 2Description
    1. 2.1  Input Power and Load (J1/J3 and J2/J4):
    2. 2.2  Enable Control (J5):
    3. 2.3  Over Voltage Protection (J6):
    4. 2.4  Input Voltage Monitor (J8 and VIN_MON):
    5. 2.5  Two back-back connected MOSFETs (Q1/Q3 and Q2/Q4):
    6. 2.6  Output slew rate control (R2 and C2):
    7. 2.7  Output Schottky Diode (D2) and LED indication:
    8. 2.8  TVS selection for 12-V battery protection:
    9. 2.9  TVS selection for 24-V battery protection:
    10. 2.10 Test Points:
  4. 3Schematic
  5. 4Test Equipment Requirements
    1. 4.1 Power Supplies
    2. 4.2 Meters
    3. 4.3 Oscilloscope
    4. 4.4 Loads
  6. 5Test Setup and Results
    1. 5.1 Initial Setup
    2. 5.2 Power up
    3. 5.3 Over Voltage Protection
    4. 5.4 Enable Control
    5. 5.5 Hot-plug and Disable using EN
    6. 5.6 Inrush Current Control
    7. 5.7 Load Response
  7. 6Board Layout and Bill of Materials
    1. 6.1 Board Layout
    2. 6.2 Bill of Materials
  8. 7Revision History

2 Description

The LM74800EVM-CD is configured by default for evaluating 12-V automotive reverse battery protection with switched output to disconnect power path or clamp the output. On board options are provided for evaluating 24-V battery protection.