Understanding Zero Cross Triac operation

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1. I have a application in which need to turn on & off a load, resistive in  nature.

mains is 220va/50Hz & load is 750ohms approx. MCu is +5V operated.

 

2. I was looking at MOC3063M ( https://www.fairchildsemi.com/da... ),

 

As it only needs 5mA forward current for tun on & off its diode at input.

 

 

3. Does zero cross triac works as :

a)If I send +5V input on diode (Pin 1 & 2), with minimum 5mA of current, then the load will be turned on whenever zero cross happens

 & load will be on as long as +5V is there on 1 & 2 pin.

 

b) And If I send zero input on diode (Pin 1 & 2),then the load will be turned off whenever zero cross happens

 & load will be on aff OFF as long as zero is there on 1 & 2 pin.

 

c) is this how this triac will work?

 

d) Will use Figure 12 ckt as datasheet link provided above except the snubber circuit.

 

4. is there any other zero cross triac to use ?

Last Edited: Sun. Dec 24, 2017 - 11:16 PM
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You got it right.
I’d suggest you use the snubber as the mains will have inductance and, as well, the snubber helps protect the opto and triac from voltage transients.

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Why on earth are you starting a second thread on the same topic? You have been here long enough to know better. Do you really want to be banned at Christmas?

 

Stay on http://www.avrfreaks.net/forum/u...

 

Annoyed Moderator

Ross McKenzie ValuSoft Melbourne Australia

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Wow Ross..... off with his head?

Jim

If you want a career with a known path - become an undertaker. Dead people don't sue! - Kartman

Please Read: Code-of-Conduct

Atmel Studio6.2/AS7, DipTrace, Quartus, MPLAB user

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Some people do not "hear" a mild rebuke when delivered. They have to be yelled at to get their attention. It is NOT the first time for this OP. He is recalcitrant in my opinion. But time will tell if he is capable of learning.

 

Ross McKenzie ValuSoft Melbourne Australia

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So the OP tends to post quite a few questions and I was wondering if he does electronics for a job?? If so I would have thought that his university or college studies would have taught him at least basic if not advanced electronics concepts??

John Samperi

Ampertronics Pty. Ltd.

www.ampertronics.com.au

* Electronic Design * Custom Products * Contract Assembly