SLUUBG3B July   2016  – August 2021 TPS548D21

 

  1.   Trademarks
  2. 1 Introduction
  3. 2 Description
    1. 2.1 Typical End-User Applications
    2. 2.2 EVM Features
  4. 3 EVM Electrical Performance Specifications
  5. 4 Schematic
  6. 5 Test Equipment
  7. 6 PWR-784EVM
  8. 7 List of Test Points, Jumpers, and Switch
  9. 8 Test Procedure
    1. 8.1 Line and Load Regulation Measurement Procedure
    2. 8.2 Efficiency
    3. 8.3 Equipment Shutdown
  10. 9 Performance Data and Typical Characteristic Curves
    1. 9.1 Efficiency
    2. 9.2 Load Regulation
    3. 9.3 Line Regulation
    4. 9.4 Transient Response
    5. 9.5 Output Ripple
    6. 9.6 Control On
    7. 9.7 Control Off
    8. 9.8 Thermal Image
  11. 10EVM Assembly Drawing and PCB Layout
  12. 11List of Materials
  13. 12Revision History

8.1 Line and Load Regulation Measurement Procedure

  1. Connect VOUT to J3 and VOUT_GND to J5 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 J4 before VIN is applied
  4. Connect VIN to J1 and VIN_GND to J2 Figure 6-1.
  5. Increase VIN from 0 V to 12 V using the digital multimeter to measure input voltage.
  6. Connect the external voltage source to TP14. Note: Make sure the external source is noise free.
  7. Increase the external voltage source from 0 V to 0.9 V.
  8. Remove the jumper on J4 to enable the controller.
  9. Use the other digital multimeter or the oscilloscope to measure output voltage VOUT at TP2 and TP10.
    Table 8-1 List of Test Points for Line and Load Measurements
    Test PointNode NameDescription
    TP2LocS+Sense VOUT + locally across C5. Use for efficiency and ripple measurements
    TP10LocS-Sense VOUT - locally across C5. Use for efficiency and ripple measurements
    TP4PVINSense VIN + across C10
    TP13PGNDSense VIN - across C10
  10. Vary the load from 0 ADC to maximum rated output 40 ADC. VOUT must remain in regulation as defined in Table 3-1.
  11. Vary VIN from 5 V to 16 V. VOUT must remain in regulation as defined in Table 3-1.
  12. Decrease the load to 0 A.
  13. Put the jumper back on J4 to disable the converter.
  14. Decrease VIN to 0 V or turn off the supply.
  15. Decrease the external voltage source to 0 V, or turn off the supply.