SLVT249 May   2026

 

  1.   1
  2.   Description
  3.   Resources
  4.   Features
  5.   Applications
  6.   6
  7. 1Test Prerequisites
    1. 1.1 Voltage and Current Requirements
    2. 1.2 Safety Warning
    3. 1.3 Dimensions
    4. 1.4 Test Setup
  8. 2Testing and Results
    1. 2.1 Efficiency Graphs
    2. 2.2 Efficiency Data
    3. 2.3 Thermal Images
      1. 2.3.1 PFC Stage
      2. 2.3.2 Thermal Image of System LLC Stage
      3. 2.3.3 Thermal Image of Backlight LLC Stage
    4. 2.4 PF Value
  9. 3Waveforms
    1. 3.1 Switching
      1. 3.1.1 PFC Switching waveform
      2. 3.1.2 System LLC Switching Waveform
      3. 3.1.3 Backlight Switching Waveform
    2. 3.2 Output Voltage Ripple
      1. 3.2.1 System LLC Output Ripple
      2. 3.2.2 Backlight LLC Output Ripple
    3. 3.3 Dynamic Response
      1. 3.3.1 Dynamic Response of the System LLC
      2. 3.3.2 Dynamic Response of the Backlight LLC
  10.   Trademarks

3.1.2 System LLC Switching Waveform

Wide range LLC Switching behavior is shown in Figure 3-3 through Figure 3-7.

CH1 is the waveform of switching node, CH6 is the primary side resonant current.

PMP23488 Switching Waveform With 165mW Load at 115Vac / 60Hz Input Voltage Figure 3-3 Switching Waveform With 165mW Load at 115Vac / 60Hz Input Voltage
PMP23488 Switching Waveform With 165mW Load at 230Vac / 50Hz Input Voltage Figure 3-4 Switching Waveform With 165mW Load at 230Vac / 50Hz Input Voltage
PMP23488 Switching Waveform With No Load With PS_ON Pull High; System Runs at 602.5KHz Figure 3-5 Switching Waveform With No Load With PS_ON Pull High; System Runs at 602.5KHz
PMP23488 Switching Waveform at Full Load With PS_ON pull high; System Runs at 158.4KHz Figure 3-6 Switching Waveform at Full Load With PS_ON pull high; System Runs at 158.4KHz
PMP23488 Switching Waveform at Peak Load With PS_ON Pull High. System Runs at 151.9KHz Figure 3-7 Switching Waveform at Peak Load With PS_ON Pull High. System Runs at 151.9KHz