SLVUBU3A
April 2020 – October 2020
LM7480-Q1
Trademarks
1
Introduction
1.1
Features
1.2
Applications
2
Description
2.1
Input Power and Load (J1/J3 and J2/J4):
2.2
Enable Control (J5):
2.3
Over Voltage Protection (J6):
2.4
Input Voltage Monitor (J8 and VIN_MON):
2.5
Two back-back connected MOSFETs (Q1/Q3 and Q2/Q4):
2.6
Output slew rate control (R2 and C2):
2.7
Output Schottky Diode (D2) and LED indication:
2.8
TVS selection for 12-V battery protection:
2.9
TVS selection for 24-V battery protection:
2.10
Test Points:
3
Schematic
4
Test Equipment Requirements
4.1
Power Supplies
4.2
Meters
4.3
Oscilloscope
4.4
Loads
5
Test Setup and Results
5.1
Initial Setup
5.2
Power up
5.3
Over Voltage Protection
5.4
Enable Control
5.5
Hot-plug and Disable using EN
5.6
Inrush Current Control
5.7
Load Response
6
Board Layout and Bill of Materials
6.1
Board Layout
6.2
Bill of Materials
7
Revision History
5.6
Inrush Current Control
Figure 5-10
Inrush current with No Load
Figure 5-11
Inrush current with 6-Ω Load