OhmSpiceOpen simulator

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400 V to 12 V flyback

Follow flyback energy transfer and see how an RCD snubber limits the switching spike.

Power

Editor showing the 400 V to 12 V flyback SPICE example as an unsaved schematic.
400 V to 12 V flyback opens as an editable, unsaved schematic.

Open and run

  1. Open Examples from the Home ribbon.
  2. Choose 400 V to 12 V flyback.
  3. Open Simulate and choose Setup to review the analyses.
  4. Choose Run for one analysis or Run All for the complete configured set.
  5. Select a matching Scope view after the run. Use Save as sheet to keep the example or Discard to close it.

Sheets, analyses, and Scope

400 V to 12 V flyback

#

Setup: Startup

AnalysisConfiguration
Transient
  • Step 12.5n
  • Stop 8m
  • Maximum step 12.5n
  • Initial conditions Enabled

Scope views and expected results

Startup

Analysis: Transient

12 V output startup
  • OutputV(vout)
Drain voltage and clamp ceiling
  • Q1 drainV(drain)
  • RCD clampV(clamp)
Energy storage and delivery
  • Primary currentI(T1)
  • Rectifier currentI(D1)

Python scripts

No Python scripts are included with this example.

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