Re: Interupting xenon flash current ?

On Thu, 06 Dec 2007 20:45:49 -0800, JosephKK
<joseph_barrett@xxxxxxxxxxxxx> wrote:

John Larkin jjlarkin@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx posted to
sci.electronics.design:

On Thu, 06 Dec 2007 10:34:57 +1100, John Tserkezis
<jt@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote:

John Larkin wrote:

A couple of people make ICs that do the whole function: flyback
converter, trigger stuff, IGBT gate driver with timing.

Yes, but where were they when I needed them back then? :-)

Maybe they didn't exist?

The older controlled-flash units had two flashtubes, one to actually
flash, and a second shunt tube, inside, that shorted out the cap
when enough light had been generated.

John

No, they commutated the flashtube with an SCR. Google SCR
commutation.

Yes, I've seen units that used a second flashtube.

John

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