SLUU364C May   2009  – January 2022 TPS51315

 

  1.   Trademarks
  2. 1 Introduction
  3. 2 Description
  4. 3 Typical Applications
  5. 4 Features
  6. 5 Electrical Performance Specifications
  7. 6 Schematic
  8. 7 Test Setup
    1. 7.1 Test Equipment
      1. 7.1.1 Voltage Source
      2. 7.1.2 Multimeters
      3. 7.1.3 Output Load
      4. 7.1.4 Oscilloscope
      5. 7.1.5 Fan
      6. 7.1.6 Recommended Wire Gauge
    2. 7.2 Recommended Test Setup
      1. 7.2.1 Configuration
      2. 7.2.2 Input Connections
      3. 7.2.3 Output Connections
      4. 7.2.4 Other Connections
  9. 8 Test Procedure
    1. 8.1 Line/Load Regulation and Efficiency Measurement Procedure
    2. 8.2 List of Test Points
    3. 8.3 Equipment Shutown Procedure
  10. 9 Performance Data and Typical Characteristic Curves
  11. 10EVM Assembly Drawing and PCB layout
  12. 11List of Materials
  13. 12References
  14. 13Revision History

8.1 Line/Load Regulation and Efficiency Measurement Procedure

  1. Ensure that the load is set to constant resistance mode and to sink 0 Adc.
  2. Ensure that the jumper provided in the EVM to short on pin 2 and pin 3 of J4 before VIN is applied.
  3. Increase VIN from 0 V to 12 V, using V1 to measure input voltage.
  4. Remove the jumper on J4 to enable the controller.
    1. No jumper on J4 to active PWM mode but disable auto-skip mode.
    2. Jumper short on pin 1 and pin 2 of J4 to active PWM mode and enable auto-skip mode.
  5. Vary load from between 0 VAdc and 10Adc, VOUT should remain in load regulation.
  6. Vary VIN from 10 V to 14 V. VOUT should remain in line regulation.
  7. Put the jumper on pin 2 and pin 3 of J4 to disable the controller.
  8. Decrease the load to 0 A.
  9. Decrease VIN to 0 V.