SNVA484B October   2011  – March 2024 LM5113

 

  1.   1
  2.   Description
  3.   IC Features
  4.   4
  5. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
  6. 2Hardware
    1. 2.1 Powering and Loading Considerations
      1. 2.1.1 Proper Board Connection
      2. 2.1.2 Source Power
      3. 2.1.3 Output Current Derating
      4. 2.1.4 Air Flow
      5. 2.1.5 Quick Start-Up Procedure
  7. 3Implementation Results
    1. 3.1 Performance Characteristics
  8. 448V to 3.3V Conversion
  9. 5Hardware Design Files
    1. 5.1 Evaluation Board Schematic
    2. 5.2 PCB Layouts
    3. 5.3 Bill of Materials (BOM)
  10. 6Additional Information
    1. 6.1 Trademarks
  11. 7Revision History

Output Current Derating

The LM5113 evaluation board is designed to operate with a maximum load current of 10A for input voltages ranging from 15V to 48V. With further increases of the input voltage, the maximum allowable load current gradually decreases to 7A, to verify reliable prolonged operation. Figure 3-3 illustrates the derating curve of the output current at room temperature with airflow of 200CFM. To further reduce the maximum load current at higher ambient temperature can be necessary.

Note that the LM5113 evaluation board does not have over current protection. Certain precautions must be taken to prevent the load current from exceeding the derating curve shown in Figure 3-3, otherwise a catastrophic failure can result.