Fast but small optocouplers?

Check NEC too, PS88xx PS8501

Cheers

The usual 2kV RMS. It's not that I can't make a small one, done it many times. The issue is that on most such projects it has to come with "the papers".

Meantime I've found this from Sharp, requires a voltage and no uncommitted emitter but might do the trick here:

I've done this sort of thing before. On a hi-mu toroid or bead, you can use fat-insulated wire, far apart. Maybe 1:1, or maybe 2t primary,

Your coders have a life? Well, there's your problem.

I vaguely recall someone had an LED and an optical receiver chip in a single package... Avago maybe? I'll look thru my TAOS/Avago project files and see if I can find a part number. ...Jim Thompson

On a sunny day (Sat, 01 Sep 2012 11:57:06 -0700) it happened Joerg wrote in :

Something wron g there, rise and fall times worst case .8uS in 1.9 OHM????? typo? Do not confuse wuth common mode rejection in 30kV /uS

I'd appreciate a hint if they still have them. But this Sharp part should do the job. Best of all, it's only 80c a pop and half a bazillion in stock which is always a good sign.

The PWM filter is done as well but the smallest 1mH inductor I can get is still 0.100" by 0.100". Big. Strange, one problems solved and then there's always the next one. Like that li'l yellow light on the dash of my car. But luckily it was just an evap alert caused by a slightly loose gas cap and I was able to reset it via OBD-II. The shop would surely have charged $50 plus. The OBD-II interface that just arrived was $12 including shipping :-)

They even have kids :-)

The one a couple miles from here has a horse ranch.

I've done that as well when there was no other way. NRZ on the other side, or DC clamper. But ... then you are on the hook to get it certified and that's a ton of paperwork. BTDT, a lot.

Good point. Other than Avago, Japanese companies have always been impressive when it comes to fast yet energy-efficient opto parts.

Loads of different types, eg

But not opto...

Here's one family of Avago parts...

I know that series, used it myself. Problem is, they are big.

Yup, typo. The test circuit in figure 1 would not be able to generate a signal at all with 1.9ohms.

??

A bit much in quiescent current and very pricey but they sure are fast. However, one has to be careful. Several clients have been burned by fancy new-tech isolator chips (not from NVE though). In all cases the comeuppance happened at the EMC test facility.

I you are willing to power the receive side, just buy a logic optocoupler with CMOS output. There are tons of them, some very fast.

Well, I've seen them simply get into the wrong state. Most have incremental/edge coupling so can get confused.

On a sunny day (Sat, 01 Sep 2012 12:35:06 -0700) it happened Joerg wrote in :

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Thing is, I've only got a (somewhat) regulated 10V on that side and not much power. A milliamp or two. So that'll add more parts.