SNOU179A May   2021  – September 2021 LM74501-Q1

 

  1.   Trademarks
  2. 1Introduction
  3. 2Setup
    1. 2.1 I/O Connector Description
    2. 2.2 Board Setup
    3. 2.3 Schematic
  4. 3Operation
    1. 3.1 LM74501-Q1EVM Performance Capture
      1. 3.1.1 LM74501-Q1EVM Startup
      2. 3.1.2 Startup Reverse Polarity (–12 V)
  5. 4EVM Board Assembly Drawings and Layout Guidelines
    1. 4.1 PCB Drawings
    2. 4.2 Bill of Materials
  6. 5Revision History

1 Introduction

The LM74501-Q1 evaluation module (LM74501-Q1EVM) helps designers evaluate the operation and performance of the LM74501-Q1 reverse polarity protection controller. This evaluation module demonstrates how an N-channel power MOSFET can emulate a very-low forward voltage diode with low IQ and low-leakage current flowing through the IC. In this design scheme, the LM74501-Q1 is combined with a MOSFET and used in series with a battery as a replacement for a Schottky diode and PFET, in reverse-polarity protection circuitry as shown in Figure 2-1. For more information on the LM74501-Q1 functional and electrical characteristics, see LM74501-Q1 "TVS Less" Reverse Battery Protection Controller data sheet.