SLVUBE6C November   2018  – July 2021 TPS56339

 

  1.   Trademarks
  2. 1Introduction
  3. 2Performance Specification Summary
  4. 3Modifications
    1. 3.1 Output Voltage Set Point
    2. 3.2 Adjustable UVLO
  5. 4EVM Photos
  6. 5Test Setup and Results
    1. 5.1  Input/Output Connections
    2. 5.2  Start-Up Procedure
    3. 5.3  Efficiency
    4. 5.4  Output Voltage Load Regulation
    5. 5.5  Output Voltage Line Regulation
    6. 5.6  Load Transients
    7. 5.7  Voltage Ripple
    8. 5.8  Powering Up
    9. 5.9  Powering Down
    10. 5.10 Output Short Protection and Recovery
    11. 5.11 Thermal Performance
  7. 6Board Layout
    1. 6.1 Layout
  8. 7Schematic and List of Materials
    1. 7.1 Schematic
    2. 7.2 List of Materials
  9. 8Revision History

5.3 Efficiency

The efficiency of this EVM peaks at a load current of about 0.5 A – 1 A, and then decreases as the load current increases towards full load. Figure 5-1 shows the efficiency for the TPS56339EVM at an ambient temperature of 25 °C. Figure 5-2 shows the efficiency for the TPS56339EVM on a semi-log scale to better show light load efficiency.

The efficiency may be lower at higher ambient temperatures, due to temperature variation in the drain-to-source resistance of the internal MOSFET.

GUID-AA140A15-EB73-4AE7-BA60-2A36EFB9E4BB-low.gifFigure 5-1 TPS56339EVM Efficiency
GUID-E16189F1-9575-4EBB-A160-4881E224A74B-low.gifFigure 5-2 TPS56339EVM Low Current Efficiency