SLUUBL7A February   2017  – February 2022 TPS543C20

 

  1.   Trademarks
  2. Introduction
    1. 1.1 Before You Begin
  3. Description
    1. 2.1 Typical End-User Applications
    2. 2.2 EVM Features
  4. EVM Electrical Performance Specifications
  5. Schematic
  6. Test Equipment
  7. TPS543C20EVM-869
  8. List of Test Points, Jumpers, and Switches
  9. Test Procedure
    1. 8.1 Line and Load Regulation Measurement Procedure
    2. 8.2 Efficiency
    3. 8.3 Equipment Shutdown
  10. Performance Data and Typical Characteristic Curves
    1. 9.1 Load Regulation
    2. 9.2 Efficiency
    3. 9.3 Power Loss
    4. 9.4 Transient Response
    5. 9.5 Output Ripple
    6. 9.6 Enable On
    7. 9.7 Control On and Off
    8. 9.8 Thermal Image
  11. 10EVM Assembly Drawing and PCB Layout
  12. 11List of Materials
  13. 12Revision History

Line and Load Regulation Measurement Procedure

Use the following procedures for line and load regulation measurement:

  1. Connect the electronic load (+) to J5 and electronic load (–) to J1 and J7 (Figure 6-1).
  2. Ensure that the electronic load is set to draw 0 ADC.
  3. Ensure the jumper provided on the EVM shorts on J2 and J6 before VIN is applied.
  4. Connect input power supply (+) to J3 and input power supply (–) to J4 (Figure 6-1).
  5. Increase VIN from 0 V to 12 V using the digital multimeter to measure input voltage.
  6. Remove the jumper on J2 and J6 to enable the controller.
  7. Use the other digital multimeter or the oscilloscope to measure output voltage VOUT at TP14 and TP3.
    Table 8-1 List of Test Points for Line and Load Measurements
    Test PointNode NameDescription
    TP14VOUTSense VOUT+ locally across C9. Use for load and line measurements
    TP3GNDSense VOUT– locally across C9. Use for load and line measurements
    TP16 or TP18VINSense VIN+ across C14 or C26
    TP35 or TP33GNDSense VIN– across C14 or C26
  8. Vary the load from 0 ADC to the maximum rated output of 80 ADC. VOUT must remain in regulation as defined in Table 3-1.
  9. Vary VIN from 5 V to 16 V. VOUT must remain in regulation as defined in Table 3-1.
  10. Decrease the load to 0 A.
  11. Put the jumper back on J2 and J6 to disable the converter.
  12. Decrease VIN to 0 V or turn off the supply.