Optocoupler

Discussion in 'General Electronics Chat' started by Iodem_Asakura, Oct 18, 2005.

  1. Iodem_Asakura

    Thread Starter Senior Member

    Sep 14, 2004
    140
    0
    I need a optocoupler with phototriac out. But i'd like to find some ic with more than one inside. Do you know of one lika that.
     
  2. Sebi

    Well-Known Member

    Sep 24, 2005
    59
    0
    Hehe... i've seen only transistor output opto dual and quad.
    Few triac output type: MOC3020, MOC3040. With zerocross detection: MOC3041
     
  3. hgmjr

    Moderator

    Jan 28, 2005
    9,030
    214
    For a list of devices in addition to the examples that seti provided, you can go to www.datasheetarchive.com then choose "Description Search" and enter the keywords "optocoupler" together with "triac". Then you can feast on the list. Maybe you can locate one that contains more than a single led-triac optocoupler.

    Good Luck,
    hgmjr
     
  4. Iodem_Asakura

    Thread Starter Senior Member

    Sep 14, 2004
    140
    0
    I read the datasheet of MOC3041, but couldn't understand it all. For example, i don't understand how the zero crossing circuit works and what is the function of this circuit on the IC. Also what is the advantage of this IC against MOC3010????

    May you explain me that? Thanks
     
  5. Sebi

    Well-Known Member

    Sep 24, 2005
    59
    0
    The advantage of zerocross-switching: noiseless switching without big spikes.
    You feed a DC to LED-side randomly, but the triac will fire after the next zerocross of AC voltage (not on 320V peak value), so the current of load increasing slower.
     
  6. Iodem_Asakura

    Thread Starter Senior Member

    Sep 14, 2004
    140
    0
    Thanks for your answer.
     
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