TIDT398 February   2025

 

  1.   1
  2.   Description
  3.   Features
  4.   Applications
  5. 1Test Prerequisites
    1. 1.1 Voltage and Current Requirements
    2. 1.2 Required Equipment
    3. 1.3 Considerations
    4. 1.4 Dimensions
    5. 1.5 Test Setup
  6. 2Testing and Results
    1. 2.1 Efficiency and Loss Graphs
    2. 2.2 Efficiency Data
    3. 2.3 Thermal Images
    4. 2.4 Bode Plots
    5. 2.5 Conducted Emissions (CISPR 25) Pre-Compliance Scans
  7. 3Waveforms
    1. 3.1 Output Voltage Ripple
    2. 3.2 Load Transients
    3. 3.3 Start-Up Sequence

1.2 Required Equipment

  • VIN power supply 20V to 60V, at least 200W at the input voltage of board under test, or 10A for the full load off a 20V input
  • Electronic load to step for efficiency graphs such as Kikusui PLZ334WL.
  • Oscilloscope such as Tektronix MDO34 with TPP0500B 10 × voltage probes
  • Digital multimeters such as Fluke 87iii or 87V
  • Vector Network Analyzer such as Bode 100 from OMICRON Lab for Bode plots
  • Signal generator such as Tektronix AFG3000 series (older) or AFG31000 series (newer): Connect at J100 to apply dynamic loads to the 3.3V output, connect at J200 to apply dynamic loads to the 5V output.
  • Mating connectors for J101 and J201 voltage senses and J102 and J202 current senses: Mate each with Amphenol 523-095-850-206-024 or equivalent which then mates with BNC male to male cable to scope input.
  • Thermal camera such as FLIR E75
  • Data acquisition & switch unit such as Keysight 34970, along with calibrated 10A and 25A current shunts for efficiency measurements
  • CISPR 25 copper top table, 5uH line impedance stabilization networks LISNs, pre-compliance ESRP3 EMI receiver such as R and S ESRP3, "48V" battery for input power for conducted emissions measurements