SLVU433A 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 Test Point Descriptions

Table 4-1 lists the test points, their labels, uses, and where additional information is located.

Table 4-1 TPS53128EVM-620 Test Points Description
Test PointLabelUseSection
TP1SS1Monitor Channel 1 Soft-Start VoltageSection 4.3.4
TP2SS2Monitor Channel 2 Soft-Start VoltageSection 4.3.4
TP3GNDGround for Input VoltageSection 4.3.1
TP4GNDGround for Channel 1 Output VoltageSection 4.3.2
TP5SW1Monitor Switching Node for Channel 1Section 4.3.5
TP6GNDGround for Channel 2 Output VoltageSection 4.3.3
TP7VOUT2Monitor Output Voltage for Channel 2Section 4.3.3
TP8VOUT1Monitor Output Voltage for Channel 1Section 4.3.2
TP9VINMonitor Input VoltageSection 4.3.1
TP10VREG5Monitor Output of VREG5 RegulatorSection 4.3.6
TP11SW2Monitor Switching Node for Channel 2Section 4.3.5