SLVU432A February   2011  – January 2022 TPS53125 , TPS53126 , TPS53127 , TPS53128 , TPS53129

 

  1.   Trademarks
  2. 1 Introduction
    1. 1.1 Description
    2. 1.2 Application
    3. 1.3 Features
  3. 2 Electrical Performance Specifications
  4. 3 Schematics
  5. 4 Connector and Test Point Descriptions
    1. 4.1 Enable Switches – SW1 and SW2
    2. 4.2 Switching Frequency Select Switch – SW3
    3. 4.3 Test Point Descriptions
      1. 4.3.1 Input Voltage Monitoring – TP3 and TP9
      2. 4.3.2 Channel-1 Output Voltage Monitoring – TP4 and TP8
      3. 4.3.3 Channel-2 Output Voltage Monitoring – TP6 and TP7
      4. 4.3.4 Soft-Start Voltage Monitoring – TP1, TP2, and TP3
      5. 4.3.5 Switching Node Monitoring – TP3, TP5, and TP11
      6. 4.3.6 5-V Regulator Output Monitoring – TP3 and TP10
  6. 5 Test Setup
    1. 5.1 Equipment
      1. 5.1.1 Voltage Source
      2. 5.1.2 Meters
      3. 5.1.3 Loads
      4. 5.1.4 Oscilloscope and Probe
      5. 5.1.5 Recommended Wire Gauge
      6. 5.1.6 Other Test Equipment
    2. 5.2 Recommended Setup
  7. 6 Test Procedure
    1. 6.1 Start-Up Procedure
    2. 6.2 Line/Load Regulation and Efficiency Measurement Procedure
    3. 6.3 Output Ripple Voltage Measurement Procedure
    4. 6.4 Shutdown Procedure
  8. 7 Performance Data and Typical Characteristic Curves
    1. 7.1 Efficiency
    2. 7.2 Line and Load Regulation
    3. 7.3 Output Voltage Ripple
    4. 7.4 Switch Node Waveforms
  9. 8 EVM Assembly Drawings and Layout
  10. 9 Bill of Materials
  11. 10Revision History

4.3.4 Soft-Start Voltage Monitoring – TP1, TP2, and TP3

The TPS53129EVM-621 provides two test points for measuring the soft-start ramp voltages. TP1 monitors the soft-start ramp of Channel 1. TP2 monitors the soft-start ramp of Channel 2. To use TP1 or TP2, connect an oscilloscope probe between TP1 or TP2 and TP3.