SLUUD73 December   2024 LM74680

 

  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 Power-Up With Enable
      2. 2.3.2 Load Step
  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

2.3.2 Load Step

Use the following instructions to perform the load step test.

  1. Set the input supply voltage VIN to 24Vac and current limit of 3A.
  2. Turn ON the power supply and observe the rectification of input voltage.
  3. Once in steady-state, increase the load using a rheostat.
  4. Observe the increase in TG1-IN1 and TG2-IN2 voltage levels.

Figure 2-3 shows an example of load step profile captured on the LM74680EVM evaluation board.

LM74680 Load Step Response of LM74680 Device Figure 2-3 Load Step Response of LM74680 Device