[chbot] Triac snubber

[Mark Atherton]

Hi Jasper,

I am not used to seeing the terms TRIAC and SMPSU in the same 
sentence, so either I am jumping to some conclusion, or you are doing 
something sneaky.

What are you trying to do ?

What are the part numbers of the bits involved ?

More details please.

Regards,

Mark

At 08:12 a.m. 21/01/2013, Jasper Mackenzie wrote:
>Good day,
>  Having a great deal of difficulty switching a small smps with a triac. I
>assume it has to do with holding voltage AND high dI/dt. I need to use the
>smps for its size in this app, and will need to switch bigger ones in the
>not too distant future.
>  The triac is driven from an opto, and the cirucit is simply the pump
>driver from a gentle annie chopped out with a hacksaw. resistor values
>have been changed etc. I have tried a cap across MT1/2...
>  Its good for a while, then it starts moemntary self triggering for a day
>or so, then full on forever...
>
>Cheers.