> I can't understand why the 'burp, hiccup' ones are a problem. I could und=
erstand if the PS went into constant current limit, but my impression is th=
at the 'burp, hiccup' ends up supplying pulses of current, and not continuo=
us current.


Read the article again.  The "burping" supply can deliver pulses of up
to 24W, with an average power of 1W, sufficient to sustain ignition.
I've been able to cause ignition of several PCBs (UL 94V-0 FR-4) with
one of these supplies, starting with an SO-8 fet that had a floating
gate, which might occur if you had a bad solder joint on a pull-off
resistor.
--=20
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