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Registered Member #2901
Joined: Thu Jun 03 2010, 01:25PM
Location:
Posts: 837
It seems to me this is used as a detector, not as a switch. Or in other words you reverse bias it, put it in series with a resistor and shine a light on it and measure the tiny differences in current.
Interesting, but not very useful for the usual endeavours on this forum.
Registered Member #2893
Joined: Tue Jun 01 2010, 09:25PM
Location: Cali-forn. i. a.
Posts: 2242
How about this:
Series some 1200V IGBTs, and use these along with leds to charge their gates with C cell batteries. Send the signal into the LED and the diode works to level shift the signal, the batteries then charge the gates, (where they would probably last a long time).
Registered Member #2901
Joined: Thu Jun 03 2010, 01:25PM
Location:
Posts: 837
As I said, it's not a switch ... you could certainly use it to detect light to trigger a driver to turn on/off an IGBT (hard switching IGBT stacks is not a great idea by the way, there is a fair bit of variance in turn on/off time) but you could do that easier and cheaper with a low voltage phototransistor.
Registered Member #2893
Joined: Tue Jun 01 2010, 09:25PM
Location: Cali-forn. i. a.
Posts: 2242
Meh it was just an idea...
Here's another interesting part, 15kV of isolation between the LED and the diode, but that is something easily beatable just using black shrink tubing and hot glue.
Registered Member #543
Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992
According to the manufacturer, these opto diodes are intended for use in high voltage switches and remote control circuitry, HV linear regulators, and for the driving of low capacitance loads, such as Pockels cells, and beam deflection plates.
Registered Member #3766
Joined: Sun Mar 20 2011, 05:39AM
Location:
Posts: 624
Something like that would be a fantastic way to protect sensitive switching circuitry from back EMF or any spikes or anything. I wonder if a half bridle circuit could be made using them without too much trouble...
Registered Member #1064
Joined: Tue Oct 16 2007, 05:04PM
Location:
Posts: 42
VMI says these application notes explain the use of OZ100SG Opto-coupler Application Notes AN-0300 - High Voltage Op-Amp Application Using Opto-Couplers AN-0200 - OC100HG Push-Pull Driver in Pockels Cells Switching Methods AN-0100 - Using a VMI Opto-coupler in Conjunction with High Voltage Relays AN-0000 - General Opto-coupler Notes How Opto-couplers Work
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10kV photodiode
