SNOU186
September 2021
LM74720-Q1
,
LM74722-Q1
Trademarks
1
Introduction
1.1
Features
1.2
Applications
2
Description
2.1
Input Power and Load (J1/J5 and J2/J6, J8/J12 and J9/J13):
2.2
Enable Control (J4 and J11):
2.3
Two Back-to-Back Connected MOSFETs (Q1/Q3-Q2/Q4 and M1/M3-M2/M4):
2.4
Output Slew Rate Control (R3 and C4, R10 and C13):
2.5
Output Schottky Diode (D3, D8) and LED Indication (D4, D10) :
2.6
TVS Selection for 12-V Battery Protection:
2.7
TVS Selection for 24-V Battery Protection:
2.8
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
Enable Control
5.4
Hot-Plug and Disable using EN
5.5
Inrush Current Control
5.6
Load Response
6
Board Layout and Bill of Materials
6.1
Board Layout
6.2
Bill of Materials
1.2
Applications
Automotive reverse battery protection
ADAS domain controller
Premium audio amplifier
Camera ECU
Head unit
USB HUBs
Power path protection, power mux and ORing