SLVU264A November   2008  – October 2021 TPS54233

 

  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
  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
  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

2.2 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 TPS54233EVM-373 at an ambient temperature of 25°C.

GUID-95DB3A34-E349-454D-9572-B8DFD3C2F866-low.gifFigure 2-1 TPS54233EVM-373 Efficiency

Figure 2-2 shows the efficiency for the TPS54233EVM-373 at lower output currents between 0.01 A and 0.20 A at an ambient temperature of 25°C.

GUID-628E891C-6A71-4F9F-924D-52F5E2F64692-low.gifFigure 2-2 TPS54233EVM-373 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.