SLVU719B May   2012  – November 2021 TPS53819A

 

  1.   Trademarks
  2. 1 Description
    1. 1.1 Typical Applications
    2. 1.2 Features
  3. 2 Electrical Performance Specifications
  4. 3 Schematic
  5. 4 Test Setup
    1. 4.1 Test and Configuration Software
      1. 4.1.1 Description
      2. 4.1.2 Features
    2. 4.2 Test Equipment
    3. 4.3 Recommended Test Setup
      1. 4.3.1 Input Connections
      2. 4.3.2 Output Connections
      3. 4.3.3 Other Connections
    4. 4.4 List of Test Points
    5. 4.5 Jumper Configuration: Enable Selection
  6. 5 EVM Configuration Using the Fusion GUI
    1. 5.1 Configuration Procedure
    2. 5.2 Default Fusion GUI Screenshots and Description
  7. 6 Test Procedure
    1. 6.1 Line and Load Regulation and Efficiency Measurement Procedure
    2. 6.2 Control Loop Gain and Phase Measurement Procedure
    3. 6.3 Equipment Shutdown
  8. 7 Performance Data and Typical Characteristic Curves
    1. 7.1  Efficiency
    2. 7.2  Load Regulation
    3. 7.3  Line Regulation
    4. 7.4  fSW Versus Load
    5. 7.5  Bode Plot
    6. 7.6  Transient Response
    7. 7.7  Output Ripple
    8. 7.8  Switching Node
    9. 7.9  Turn-On Waveform
    10. 7.10 Turn-Off Waveform
    11. 7.11 Pre-bias Turn-On Waveform
    12. 7.12 Thermal Images
  9. 8 EVM Assembly Drawing and PCB layout
  10. 9 Bill of Materials
  11. 10Revision History

6.2 Control Loop Gain and Phase Measurement Procedure

TPS53819AEVM-123 contains a place holder for a 10-Ω series resistor in the feedback loop for loop response analysis.

  1. Replace R16 with a 10-Ω resistor.
  2. Set up EVM as described in Section 4 and Figure 4-3.
  3. Connect isolation transformer to test points marked TP13 and TP11.
  4. Connect input signal amplitude measurement probe (Loop B) to TP11. Connect output signal amplitude measurement probe (Loop A) to TP13.
  5. Connect ground lead of Loop A and Loop B to TP12.
  6. Inject around 10 mV or less signal through the isolation transformer.
  7. Sweep the frequency from 100 Hz to 1 MHz with 10 Hz or lower post filter. The control loop gain and phase margin can be measured.
  8. Disconnect isolation transformer from bode plot test points before making other measurements (Signal injection into feedback can interfere with accuracy of other measurements).