SLUU406A February   2010  – January 2022 CSD16322Q5 , CSD16410Q5A , TPS40303 , TPS40304 , TPS40305

 

  1.   Trademarks
  2. 1Description
    1. 1.1 Applications
    2. 1.2 Features
  3. 2TPS40305EVM-488 Electrical Performance Specifications
  4. 3TPS40305EVM-488 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 Set Up
    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 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. 6TPS40305EVM-488 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. 7TPS40305EVM-488 Assembly Drawings and Layout
  9. 8TPS40305EVM-488 Bill of Materials
  10. 9Revision History

5.2.1 Procedure

  1. Working at an ESD workstation, make sure that any wrist straps, bootstraps, or mats are connected referencing the user to earth ground before power is applied to the EVM. Electrostatic smock and safety glasses should also be worn.
  2. Prior to connecting the DC input source, VIN, it is advisable to limit the source current from VIN to 3.0-A maximum. Make sure VIN is initially set to 0 V and connected as shown in Figure 5-1.
  3. Connect VIN to J1 as shown in Figure 5-1.
  4. Connect ammeter A1 between VIN and J1 as shown in Figure 5-1.
  5. Connect voltmeter V1 to TP1 and TP2 as shown in Figure 5-1.
  6. Connect voltmeter V2 to TP3 and TP4 as shown in Figure 5-1.
  7. Connect oscilloscope probes to desired test points per Table 4-1.
  8. Place the fan as shown in Figure 5-1 and turn on making sure to blow air directly across the evaluation module.