SLVUCF1A September   2022  – October 2022 TPSM63610

 

  1.   Abstract
  2.   Trademarks
  3. 1High-Density EVM Description
    1. 1.1 Typical Applications
  4. 2Test Setup and Procedure
    1. 2.1 EVM Connections
    2. 2.2 EVM Setup
    3. 2.3 Test Equipment
    4. 2.4 Recommended Test Setup
      1. 2.4.1 Input Connections
      2. 2.4.2 Output Connections
    5. 2.5 Test Procedure
      1. 2.5.1 Line, Load Regulation and Efficiency
  5. 3Test Data and Performance Curves
    1. 3.1 Efficiency and Load Regulation Performance
    2. 3.2 Waveforms
    3. 3.3 Bode Plot
    4. 3.4 EMI Performance
  6. 4EVM Documentation
    1. 4.1 Schematic
    2. 4.2 Bill of Materials
    3. 4.3 PCB Layout
    4. 4.4 Multi-Layer Stackup
  7. 5Device and Documentation Support
    1. 5.1 Device Support
      1. 5.1.1 Development Support
        1. 5.1.1.1 Custom Design With WEBENCH® Tools
    2. 5.2 Documentation Support
      1. 5.2.1 Related Documentation
  8. 6Revision History

2.3 Test Equipment

Voltage Source: The input voltage source VIN must be a 36-V variable DC source capable of supplying 6 A.

Multimeters:

  • Voltmeter 1: Measure the input voltage at VIN S+ to VIN S–.
  • Voltmeter 2: Measure the output voltage at VOUT S+ to VOUT S–.
  • Ammeter 1: Measure the input current. Set the ammeter to 1-second aperture time.
  • Ammeter 2: Measure the output current. Set the ammeter to 1-second aperture time.

Electronic Load: Use an electronic load set to constant-resistance (CR) or constant-current (CC) mode and capable of 0 ADC to 6 ADC. For a no-load input current measurement, disconnect the electronic load as it can draw a small residual current.

Oscilloscope: With the scope set to 20-MHz bandwidth and AC coupling, measure the output voltage ripple directly across an output capacitor with a short ground lead normally provided with the scope probe. Place the oscilloscope probe tip on the positive terminal of the output capacitor, holding the ground barrel of the probe through the ground lead to the negative terminal of the capacitor. TI does not recommend using a long-leaded ground connection because this may induce additional noise given a large ground loop. To measure other waveforms, adjust the oscilloscope as needed.

Safety: Always use caution when touching any circuits that can be live or energized.