SLVUAP3A April   2016  – October 2021 TPS54202

 

  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 Output Capacitor and Feed-Forward Capacitor
      3. 1.3.3 Adjustable UVLO
  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 Output Voltage Ripple
    7. 2.7 Input Voltage Ripple
    8. 2.8 Powering Up
    9. 2.9 Powering Down
  4. 3Board Layout
    1. 3.1 Layout
  5. 4Schematic and Bill of Materials
    1. 4.1 Schematic
    2. 4.2 Bill of Materials
  6. 5Revision History

2.2 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 2-1 shows the efficiency for the TPS54202EVM-716 at an ambient temperature of 25°C.

GUID-23CF7E30-B2B5-4011-BC06-ABAB6BE0CB12-low.gifFigure 2-1 TPS54202EVM-716 Efficiency

Figure 2-2 shows the efficiency for the TPS54202EVM-716 on a semi-log scale to better show light load efficiency. The ambient temperature is 25°C.

GUID-28478CE3-7435-43E4-98CB-97E75ED48BF7-low.gifFigure 2-2 TPS54202EVM-716 Low Current Efficiency

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