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[SOLVED] Simulation result of a resonant converter

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kudjung

kudjung

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Folks,

I'm trying to do some simplified simulation of a resonant conveter that used for CCFL. Got some results that seem to be reasonable. I've attached the simulation results here. There's one thing that I don't understand on this simulation(using LtSpice). If I used a PWL as source to create a pulsethe oscillation(resonant) frequency look correct. However, If I use a DC source and voltage control switch to create pulse then oscillation(resonant) frequency is quite lower than expected.

Anyone see a reason why it's like that.

TIA,
 

Attachments

  • CCFL_SIMULATION_SWCONTROL.JPG
    CCFL_SIMULATION_SWCONTROL.JPG
    284 KB · Views: 125
  • CCFL_SIMULATION_PWL.JPG
    CCFL_SIMULATION_PWL.JPG
    280.7 KB · Views: 122

Guys,
Ignore this. I think I know what going on.
 

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