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| Searching for an optocoupler with MOSFET output stage |
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| Lupin III.:
I found some LCA110 (by IXYS, they call it OptoMOS) on ebay quite cheap (less than 10€ for 10, the guy only had 50, so I guess it was surplus). I'll start experimenting with those. I looked at other vendors for other parts, but most of them had either high shipping costs (mouser wants 20€ to ship to Austria for example), not really that big of a selection, or were very pricey per part (I'll need 10-15 eventually, and since it's for a hobby project, I'm skimping whereever I can ;) ). I was thinking of building the bipolar opto/MOSFET switch, but I need multiple of them and I'd rather have to solder a single component than multiple (size is an issue as well; I want to add that onto another circuit into an existing case). I also have an application in mind where I not only don't have any power available, but not even a common ground so I'd need a proper "relay". |
| Leo Bodnar:
https://www.vishay.com/docs/83469/vom1271t.pdf Beware the ones without turn-off feature. They hold the charge and it can take ages for MOSFET to turn off. Putting a high value resistor across the gate will make sure it actually turns off at all. Leo --- Quote from: Lupin III. on January 06, 2020, 04:50:49 pm ---I'm looking for an optocoupler that has a MOSFET output stage and not the usual bipolar output transistor. --- End quote --- |
| thm_w:
--- Quote from: Leo Bodnar on January 07, 2020, 10:25:09 pm ---https://www.vishay.com/docs/83469/vom1271t.pdf Beware the ones without turn-off feature. They hold the charge and it can take ages for MOSFET to turn off. Putting a high value resistor across the gate will make sure it actually turns off at all. Leo --- End quote --- The LCA110 OP chose looks reasonable enough, 3ms on, 3ms off max: http://www.ixysic.com/home/pdfs.nsf/www/LCA110.pdf/ I'm going to try LH1520, 2ms on/off max: http://www.vishay.com/docs/83818/lh1520ab.pdf |
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