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Topic: optocoupler interfacing with arduino to get square waves (Read 142 times) previous topic - next topic

athenakiran

Feb 13, 2018, 06:50 am Last Edit: Feb 13, 2018, 07:01 am by athenakiran
hi all
I am very confused as to how I should approach a circuit design after reading all datasheets and various blogs on optocoupler. whether load should be in collector side or emitter side.My aim is to pass square waves from Arduino to a MOSFET driver (TC4427A)as fast as possible.I didn't have a spice model of the FOD817A optocoupler to simulate and check it.I know there is optogate drivers available but since I had only these, I have to interface coupler with gate driver for now.I have attached the data sheets of the optocoupler and driver.I will be grateful if would help me.
Thankyou

DrDiettrich

I'd put the load (resistor) at the collector side, dunno what subtle parameter will change when placed at the emitter side. If you have a scope, you can check both versions for eventual differences in rise or fall times.

wvmarle

If you want as fast as possible, don't use an optocoupler. The one you link to has a delay of up to 18 microseconds.

Now if you would explain what you're trying to do, we'd be able to actually provide suggestions.
Quality of answers is related to the quality of questions. Good questions will get good answers. Useless answers are a sign of a poor question.

athenakiran

am trying to run  a power MOSFET to create high voltage pulses in ranges of milliseconds

DrDiettrich

Have you already tried circuits without optocouplers?

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