SNVU588A December   2017  – January 2022 TPS40345

 

  1.   Trademarks
  2. 1Description
    1. 1.1 Applications
    2. 1.2 Features
  3. 2TPS40345EVM-353 Electrical Performance Specifications
  4. 3TPS40345EVM-353 Schematic
  5. 4Connector and Test Point Descriptions
    1. 4.1 Enable Jumper (JP2)
    2. 4.2 Frequency Spread Spectrum – FSS Jumper (JP1)
    3. 4.3 Test Point Descriptions
      1. 4.3.1 Input Voltage Monitoring (TP1 and TP2)
      2. 4.3.2 Output Voltage Monitoring (TP3 and TP4)
      3. 4.3.3 Loop Response Testing (TP5, TP6, TP7, TP8, and R3)
      4. 4.3.4 Error Amplifier Voltage Monitoring (TP9, TP10, and TP11)
      5. 4.3.5 Switching Waveform Monitoring (TP12, TP13, TP14, and TP15)
      6. 4.3.6 Power-Good Voltage Monitoring (TP16 and TP18)
      7. 4.3.7 Enable and Soft-Start Voltage Monitoring (TP17 and TP18)
  6. 5Test Setup
    1. 5.1 Equipment
      1. 5.1.1 Voltage Source
      2. 5.1.2 Meters
      3. 5.1.3 Load
      4. 5.1.4 Oscilloscope
      5. 5.1.5 Recommended Wire Gauge
      6. 5.1.6 Other
    2. 5.2 Equipment Setup
      1. 5.2.1 Procedure
      2. 5.2.2 Diagram
    3. 5.3 Start-Up/Shutdown Procedure
    4. 5.4 Output Ripple Voltage Measurement Procedure
    5. 5.5 Control Loop Gain and Phase Measurement Procedure
    6. 5.6 Equipment Shutdown
  7. 6TPS40345EVM-353 Test Data
    1. 6.1 Efficiency
    2. 6.2 Line and Load Regulation
    3. 6.3 Output Voltage Ripple
    4. 6.4 Switch Node
    5. 6.5 Control Loop Bode Diagram
    6. 6.6 Additional Waveforms
      1. 6.6.1 Output Ripple With Frequency Spread Spectrum (FSS) Enabled
  8. 7TPS40345EVM-353 Assembly Drawings and Layout
  9. 8TPS40345EVM-353 Bill of Materials
  10. 9Revision History

4.3 Test Point Descriptions

Table 4-1 Test Point Descriptions
TEST POINTLABELUSESECTION
TP1VINMeasurement test point for input voltage4.3.1
TP2GNDGround test point for input voltage4.3.1
TP3VOUTMeasurement test point for output voltage4.3.1
TP4GNDGround test point for output voltage4.3.2
TP5CHBMeasurement test point for channel B of loop response4.3.3
TP6SGNDGround test point for channel B of loop response4.3.3
TP7CHAMeasurement test point for channel A of loop response4.3.3
TP8SGNDGround test point for channel A of loop response4.3.3
TP9SGNDGround test point for error amplifier measurements4.3.4
TP10COMPMeasurement test point for error amplifier output voltage4.3.4
TP11FBMeasurement test point for error amplifier input voltage4.3.4
TP12HDRVMeasurement test point for high-side gate driver voltage4.3.5
TP13SWMeasurement test point for switching node voltage4.3.5
TP14LDRVMeasurement test point for low-side gate driver voltage4.3.5
TP15PGNDGround test point for switch node and gate drive voltages4.3.5
TP16PGOODMeasurement test point for power good4.3.6
TP17EN/SSMeasurement test point for enable / soft start4.3.7
TP18SGNDGround test point for power good and enable / soft start4.3.6 and 4.3.7