• "Fundamentally, the MOSFET and IGBT do not require switching aid circuits". SRSLY? NOWAI.
  • but no, this says "Schottky diodes are generally needed to protect the outputs".
  • yes? "Some MOSFETs (actually most) have these diodes built-in, so they may not be necessary."
• Zener diodes
  • a few 75v, 0.066A zeners
  • a bunch of 15v, 0.3333A zeners (ooers)
  • NOTE: it's NOT POSSIBLE to wire these in parallel to increase wattage.... because of tolerances, one diode will always start conducting before the other(s), and will tend to bear much of the load, and will tend to
• MOVs
  • don't use for HV applications — they degrade with use
• RC
  • maxim's writeup
  • but.... requires very careful calculations?
    • here's some
• see "Protecting Your Ignition Coil Driver": RC network, MOV, or neon light
• writeups
  • Seminar 900 Topic 2 - Snubber Circuits"
  • $70 eBook (videos)
  • bridge snubbers
  • "Snubber Circuits"
  • buy the "Power Supply Designer's Handbook"?
  • Snubbers (dV/dt)

classifications

• dissipative snubbers — the energy in the snubber is dissipated in a resistive element
• non-dissipative snubbers — the energy is returned to the input or moved ahead to the output

• polarized snubber — only acts on one edge of the waveform
• non-polarized snubber — acts on both edges of the waveform

issues

• speed
  • if the