SLUUAY7B May   2014  – August 2021 TPS544B20 , TPS544C20

 

  1. 1 Description
    1. 1.1 Typical Applications
    2. 1.2 Features
  2. 2 Electrical Performance Specifications
  3. 3 Schematic
  4. 4 Test Setup
    1. 4.1 Test and Configuration Software
      1. 4.1.1 Description
      2. 4.1.2 Features
    2. 4.2 Test Equipment
    3. 4.3 The PWR-634EVM
    4. 4.4 Test Set up and USB Interface Adapter
    5. 4.5 List of Test Points
  5. 5 EVM Configuration Using the Fusion GUI
    1. 5.1 Configuration Procedure
  6. 6 Test Procedure
    1. 6.1 Line/Load Regulation and Efficiency Measurement Procedure
    2. 6.2 Efficiency
    3. 6.3 Equipment Shutdown
  7. 7 Performance Data and Typical Characteristic Curves
    1. 7.1 Efficiency
    2. 7.2 Load Regulation
    3. 7.3 Transient Response
    4. 7.4 Output Ripple
  8. 8 Screen Shots
    1. 8.1 Fusion GUI Screen Shots
  9. 9 EVM Assembly Drawing and PCB Layout
  10. 10List of Materials
  11. 11Revision History

6.2 Efficiency

To measure the efficiency of the power train on the EVM, it is important to measure the voltages at the correct location. This is necessary because otherwise the measurements will include losses in efficiency that are not related to the power train itself. 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, and they must not be included in efficiency measurements.

Table 6-1 List of Test Points for Efficiency Measurements
TEST POINTNODE NAMEDESCRIPTION
TP8VINMeasurement point for VIN +VE
TP9PGNDMeasurement point for VIN –VE
TP7VOUTMeasurement point for VOUT +VE
TP11PGNDMeasurement point for VOUT –VE

Input current can be measured at any point in the input wires, and output current can be measured anywhere in the output wires of the output being measured. Using these measurement points result in efficiency measurements that do not include losses due to the connectors and PCB traces.