SLUUD80 December   2024 LM74681

 

  1.   1
  2.   Description
  3.   Features
  4.   Applications
  5.   5
  6. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Device Information
  7. 2Hardware
    1. 2.1 Test Points and Connectors
    2. 2.2 Test Equipment and Setup
      1. 2.2.1 Power Supplies
      2. 2.2.2 Meters
      3. 2.2.3 Oscilloscope
      4. 2.2.4 Loads
    3. 2.3 Test Setup and Procedures
      1. 2.3.1 UVLO Functionality
      2. 2.3.2 Polarity Agnostic Startup
  8. 3Hardware Design Files
    1. 3.1 Schematic
    2. 3.2 PCB Layouts
    3. 3.3 Bill of Materials (BOM)
  9. 4Additional Information
    1.     Trademarks

Device Information

LM74681 is an ideal diode bridge controller that can drive four external N-channel MOSFETs in bridge configuration to eliminate traditional diode bridges for superior thermals and efficiency. The top-gates are driven to emulate a very-low forward voltage (11.5mV typ.) diode with low IQ. The wide input supply of 30V to 80V allows protection and control of 48V PoE systems with ultra low Iq in detection and classification phase.