Anyone have experience with photo thyristors?

How well do they work? Cautions? Suggestions?

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

Buy a Fiarysler with your tax credit...
Ignore that grinding noise, that is normal :-)

"Jim Thompson" wrote in
message ...
Anyone have experience with photo thyristors?

How well do they work? Cautions? Suggestions?

I used KMOC3022 for switching in a home telephone exchange hobby project and
they worked very well:

http://www.holmea.demon.co.uk/Exchange/Schematics.htm

On Thu, 07 May 2009 14:45:59 -0700, the renowned Jim Thompson
wrote:

Anyone have experience with photo thyristors?

Used LASCRs *decades* ago.

How well do they work? Cautions? Suggestions?

...Jim Thompson

AFAIK, they're pretty much dead as individual components. They live on
in some optocouplers.

Cautions? As with all thyristors watch max dv/dt at high temperature
and turn-off characteristics. Can't think of anything unusual. If it's
a triac driver you probably want to be sure you don't drive it
asymmetrically under any conditions 'cause that will put DC into the
source and load-- in case those might be transformers or whatever.


Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com

"Spehro Pefhany" wrote in message
...
On Thu, 07 May 2009 14:45:59 -0700, the renowned Jim Thompson
wrote:

Anyone have experience with photo thyristors?

Used LASCRs *decades* ago.

How well do they work? Cautions? Suggestions?

...Jim Thompson

AFAIK, they're pretty much dead as individual components. They live on
in some optocouplers.

Cautions? As with all thyristors watch max dv/dt at high temperature
and turn-off characteristics. Can't think of anything unusual. If it's
a triac driver you probably want to be sure you don't drive it
asymmetrically under any conditions 'cause that will put DC into the
source and load-- in case those might be transformers or whatever.


Best regards,
Spehro Pefhany

I haven't seen one in ages. Do remember seeing a construction article in
Popular Electronics (or was it EI?) using one to trigger a slave photoflash.