SLVUD71 June   2025 TPS544B28

 

  1.   1
  2.   Description
  3.   Get Started
  4.   Features
  5.   Applications
  6.   6
  7. 1Evaluation Module Overview
    1. 1.1 Introduction
      1. 1.1.1 Before You Begin
    2. 1.2 Kit Contents
    3. 1.3 Specifications
    4. 1.4 Device Information
  8. 2Hardware
    1. 2.1 Test Equipment
      1. 2.1.1 Voltage Source
      2. 2.1.2 Oscilloscope
      3. 2.1.3 Multimeters
      4. 2.1.4 Output Load
      5. 2.1.5 Fan
      6. 2.1.6 USB-to-GPIO Interface Adapter
      7. 2.1.7 Recommended Wire Gauge
      8. 2.1.8 List of Test Points, Jumpers, and Connectors
    2. 2.2 Test Setup
      1. 2.2.1 Test and Configuration Software
        1. 2.2.1.1 Description
        2. 2.2.1.2 Features
  9. 3Software
    1. 3.1 EVM Configuration Using the Fusion GUI
      1. 3.1.1 Configuration Procedure
    2. 3.2 Using the Fusion GUI
      1. 3.2.1 Opening the Fusion GUI
      2. 3.2.2 Changing ON_OFF_CONFIG
      3. 3.2.3 Pin Strapping
      4. 3.2.4 All Config
      5. 3.2.5 Monitor
      6. 3.2.6 Status
  10. 4Implementation Results
    1. 4.1 Test Procedure
      1. 4.1.1 Line and Load Regulation and Efficiency Measurement Procedure
      2. 4.1.2 Efficiency Measurement Test Points
      3. 4.1.3 Control Loop Gain and Phase Measurement Procedure
    2. 4.2 Performance Data and Typical Characteristic Curves
      1. 4.2.1 Efficiency
      2. 4.2.2 Load Regulation
      3. 4.2.3 Line Regulation
      4. 4.2.4 Output Ripple
      5. 4.2.5 Control On
      6. 4.2.6 Control Off
      7. 4.2.7 Thermal Image
  11. 5Hardware Design Files
    1. 5.1 Schematic
    2. 5.2 EVM Assembly Drawing and PCB Layout
    3. 5.3 Bill of Materials
  12. 6Additional Information
    1. 6.1 Trademarks

4.1.2 Efficiency Measurement Test Points

To evaluate the efficiency of the power train (device and inductor), measuring the voltages at the correct location is important. Otherwise, the measurements include losses that are not related to the power train. Losses incurred by the voltage drop in the copper traces and in the input and output connectors are not related to the efficiency of the power train, which must not be included in efficiency measurements.

Input current can be measured at any point in the input wires. Output current can be measured anywhere in the output wires of the output being measured.

The following table shows the measurement points for input voltage and output voltage. VIN and VOUT are measured to calculate the efficiency. Using these measurement points results in efficiency measurements that excluded losses due to the wires and connectors.

Table 4-1 Test Points for Efficiency Measurements
Test PointNode NameDescriptionComment
TP1PVIN_SInput voltage measurement point for VINThe pair of test points are connected to the VIN/PGND pins of U1. The voltage drop between input terminal to the device pins is not included for efficiency measurement.
TP14PGND_SInput voltage measurement point for PGND
TP3VOUT_EFFOutput voltage measurement point for VOUTThe pair of test points are connected near the output of the power train. The voltage drop from the output point of the inductor to the output terminals is not included for efficiency measurement.
TP15PGND_EFFOutput voltage measurement point for PGND