SLUU297B December   2007  – January 2022 TPS40195

 

  1.   Trademarks
  2. 1 Introduction
  3. 2 Description
    1. 2.1 Applications
    2. 2.2 Features
  4. 3 TPS40195EVM Electrical Performance Specifications
  5. 4 Schematic
    1. 4.1 Test Points
  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
      5. 5.1.5 Signal Generator
      6. 5.1.6 Recommended Wire Gauge
      7. 5.1.7 Other
    2. 5.2 Equipment Setup
  7. 6 Test Procedure
    1. 6.1 Line and Load Regulation
    2. 6.2 Output Ripple Measurement (TP5, TP13)
    3. 6.3 Loop Analysis (TP7, TP8, TP10)
    4. 6.4 Disable (TP11) and Power Good (TP9)
    5. 6.5 Switch Node (TP4) and SYNC (TP12)
    6. 6.6 Equipment Shutdown
  8. 7 TPS40195EVM Typical Performance Data and Characteristic Curves
    1. 7.1 Line and Load Regulation
    2. 7.2 Efficiency
    3. 7.3 Output Voltage Ripple
    4. 7.4 Transient Response
    5. 7.5 Bode Plots
    6. 7.6 Test Point Waveforms
  9. 8 EVM Assembly Drawings and Layout
  10. 9 List of Materials
  11. 10Revision History

4.1 Test Points

Table 4-1 Test Points Available on the TPS40195EVM
TEST POINTNAMEDESCRIPTION
TP1VINMeasure the input voltage at this point.
TP2GNDGround connection for input voltage measurements
TP3Soft StartMonitor the soft start capacitor voltage.
TP4Switch NodeMonitor the switch node voltage.
TP5VOUTMeasure the output voltage and ripple at this point, see Section 6.1.
TP6GNDGround connection for output voltage measurements
TP7CHAInput A for loop analysis, see Section 6.3.
TP8CHBInput B for loop analysis, see Section 6.3.
TP9Power GoodMonitor power good signal at this point, see Section 6.4.
TP10GNDGeneral ground connection
TP11DISABLEShort TP11 to TP2 to disable the TPS40195 controller, see Section 6.4.
TP12SYNCInject square wave synchronizing pulse here, see Section 6.5.
TP13GNDUsed for output ripple test with TP5, see Section 6.2.