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

3.1 Output Voltage Ripple

Output voltage ripple is shown in Figure 3-1 and Figure 3-2. About half of the output ripple is due to the 10kHz switching frequency dithering activated to reduce conducted emissions. Overall output ripple is still well under 1% of Vout.

PMP23452 3.3V Loaded to 20A Figure 3-1 3.3V Loaded to 20A
PMP23452 5V Loaded to 15A Figure 3-2 5V Loaded to 15A