SLVU379A August   2010  – August 2021 TPS54521

 

  1.   Trademarks
  2. 1Introduction
    1. 1.1 Background
    2. 1.2 Performance Specification Summary
    3. 1.3 Modifications
      1. 1.3.1 Output Voltage Set Point
      2. 1.3.2 Slow-Start Time
      3. 1.3.3 Track In
      4. 1.3.4 Adjustable UVLO
      5. 1.3.5 Input Voltage Rails
  3. 2Test Setup and Results
    1. 2.1  Input / Output Connections
    2. 2.2  Efficiency
    3. 2.3  Output Voltage Load Regulation
    4. 2.4  Output Voltage Line Regulation
    5. 2.5  Load Transients
    6. 2.6  Loop Characteristics
    7. 2.7  Output Voltage Ripple
    8. 2.8  Input Voltage Ripple
    9. 2.9  Powering Up
    10. 2.10 Hiccup Overcurrent Mode Operation
    11. 2.11 Thermal Characteristics
  4. 3Board Layout
    1. 3.1 Layout
    2. 3.2 Estimated Circuit Area
  5. 4Schematic and Bill of Materials
    1. 4.1 Schematic
    2. 4.2 Bill of Materials
  6. 5Revision History

2.11 Thermal Characteristics

This section shows a thermal image of the TPS54521EVM-607 running at 12 V input and 5 A load and a graph showing the junction temperature vs. output current of the EVM circuit. There is no air flow and the ambient temperature is 25°C. The peak temperature of the IC (91.9°C) is below the maximum recommended operating condition listed in the data sheet of 125°C.

GUID-DCEC172B-53BD-4A1F-B518-CBCF424358C4-low.gifFigure 2-12 TPS54521EVM-607 Thermal Image
GUID-C0C1F904-D8E3-4E70-B214-B21CFAF68A20-low.gifFigure 2-13 TPS54521EVM-607 Junction Temperature vs Load Current