SLVUBU5A May   2020  – December 2020 LM7481-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 (J10 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 C4):
    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 RC Input Snubber Option (R7 and C15):
    11. 2.11 Optional LC Filter at the Output (L2 and C11):
    12. 2.12 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 Input Reverse Polarity
    6. 5.6 Load Transient Response
  7. 6EVM Board Layout and Bill of Materials
    1. 6.1 EVM Board Layout
    2. 6.2 Bill of Materials
  8. 7Revision History

1 Introduction

TI's Evaluation Module LM74810EVM helps designers evaluate the operation and performance of the LM74810-Q1 ideal diode controller with switched output. This evaluation module demonstrates how LM74810-Q1 controls two N-channel power MOSFETs with ideal diode MOSFET connected first followed by second MOSFET for switched output and power path cut-off. LM74810-Q1 is a dual gate drive Ideal diode controller where the first gate drive DGATE controls an external N-channel MOSFET to emulate an ideal diode and the second gate drive HGATE controls another external N-Channel MOSFET to cutoff the power path when disabled or during an over voltage condition. Second MOSFET is can also be used to clamp the output during over voltage or load dump conditions.

Note:

High Current Warning: LM74810EVM is capable to handle 10 A of current and necessary safety precautions are required when using the EVM. EVM does not produce > 5-A current on its own, but passes the current from input power to the load.

Note:

For Class A performance during input micro-short test LV124 E-10, it is recommended to connect EN/UVLO, J5 pin 2 to J10 pin 1 or an external control using J5 pin 2.