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

4.3 Test Point Descriptions

Table 4-1 Test Point Description
Test Point Label Use Section
TP1 VIN Measurement test point for input voltage Section 4.3.1
TP2 GND Ground test point for input voltage Section 4.3.1
TP3 VOUT Measurement test point for output voltage Section 4.3.1
TP4 GND Ground test point for output voltage Section 4.3.2
TP5 CHB Measurement test point for channel B of loop response Section 4.3.3
TP6 SGND Ground test point for channel B of loop response Section 4.3.3
TP7 CHA Measurement test point for channel A of loop response Section 4.3.3
TP8 SGND Ground test point for channel A of loop response Section 4.3.3
TP9 SGND Ground test point for error amplifier measurements Section 4.3.4
TP10 COMP Measurement test point for error amplifier output voltage Section 4.3.4
TP11 FB Measurement test point for error amplifier input voltage Section 4.3.4
TP12 HDRV Measurement test point for high-side gate driver voltage Section 4.3.5
TP13 LDRV Measurement test point for low-side gate driver voltage Section 4.3.5
TP14 PGND Ground test point for switch node and gate drive voltages Section 4.3.5
TP15 SW Measurement test point for switch node voltage Section 4.3.5
TP16 PGOOD Measurement test point for power good Section 4.3.6
TP17 EN/SS Measurement test point for enable/soft start Section 4.3.7
TP18 SGND Ground test point for power good and enable/soft start Section 4.3.6 and Section 4.3.7