SLUUBE0A November   2015  – August 2021 TPS549A20

 

  1.   Trademarks
  2. 1 Introduction
  3. 2 Description
    1. 2.1 Typical Applications
    2. 2.2 Features
  4. 3 Electrical Performance Specifications
  5. 4 Schematic
  6. 5 Test Setup
    1. 5.1 Test Equipment
    2. 5.2 Recommended Test Setup
  7. 6 Configurations
    1. 6.1 PMBus Address Selection
    2. 6.2 Mode Selection
    3. 6.3 VDD Pin Supply Selection
  8. 7 Test Procedure
    1. 7.1 Line and Load Regulation and Efficiency Measurement Procedure
    2. 7.2 PMBUS Setup and Verification
    3. 7.3 Control-Loop Gain and Phase-Measurement Procedure
    4. 7.4 List of Test Points
    5. 7.5 Equipment Shutdown
  9. 8 EVM Assembly Drawing and PCB Layout
  10. 9 Bill of Materials
  11. 10Revision History

7.1 Line and Load Regulation and Efficiency Measurement Procedure

  1. Set up the EVM as described in Section 5 and Figure 5-2.
  2. Ensure the load is set to constant-resistance mode and to sink at 0 ADC.
  3. Ensure all jumper setting are configured as shown in Section 6.
  4. Ensure the jumper provided in the EVM shorts on J2 before VIN is applied.
  5. Increase VIN from 0 to 12 V. Use V1 to measure input voltage.
  6. Remove the jumper on J2 to enable the controller.
  7. Use V2 to measure the VOUT voltage.
  8. Vary the load from 0 to 10 ADC, VOUT must remain in load regulation.
  9. Vary VIN from 8 to 14 V, VOUT must remain in line regulation.
  10. To disable the converter, place the jumper on J2.
  11. Decrease the load to 0 A
  12. Decrease VIN to 0 V.