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

4.2 Test Equipment

Voltage Source: The input voltage source VIN should be a 0-V to 14-V variable DC source capable of supplying 30 ADC. Connect VIN to J4 as shown in Figure 4-2.

Multimeters:

  • V1: VIN at TP1 (VIN) to TP4 (PGND)
  • V2: VOUT at TP7 (VOUT) to TP9 (PGND)
  • A1: VIN input current

Output Load: The output load should be an electronic constant-resistance mode load capable of 0 ADC to 25 ADC at 1.2 V. An electronic constant-current load is also acceptable.

Oscilloscope: A digital or analog oscilloscope can be used to measure the output ripple. The oscilloscope must be set for 1-MΩ impedance, 20-MHz bandwidth, AC coupling, 2-μs per division horizontal resolution, 20-mV per division vertical resolution. As shown in Figure 4-1, test points TP7 and TP9 can be used to measure the output ripple voltage by placing the oscilloscope probe tip through TP7 and holding the ground barrel to TP9. It is not recommended to use a long leaded ground connection because this may induce additional noise due to a large ground loop. Alternatively, the output ripple can be measured directly across C14 with a short ground lead as shown in Figure 4-2. To measure other waveforms, adjust the oscilloscope as needed.

GUID-A1358A95-8D51-4367-B76B-A65841C0E15B-low.gifFigure 4-1 Tip and Barrel Measurement for VOUT Ripple
GUID-FF66E397-60B9-407E-BA7B-0E4DAF9429FF-low.gifFigure 4-2 Probe with Short Ground Lead for VOUT Ripple Across C14

Fan: Some of the components of this EVM can approach temperatures of 60°C during operation. A small fan capable of 200–400 LFM is recommended to reduce component temperatures while the EVM is operating. Exercise caution when touching the EVM while the fan is not running and always exercise caution when touching any circuits that can be live or energized.

Recommended Wire Gauge:

  • VIN to J1 (12-V input): The recommended wire size is 1 × AWG #14 per input connection, with the total length of wire less than four feet (two feet input, two feet return).
  • J3 to LOAD: The minimum recommended wire size is 2 × AWG #14, with the total length of wire less than four feet (two feet input, two feet return).