High current optocoupler

Discussion in 'General Electronics Chat' started by Far, Jul 26, 2009.

  1. Far

    Thread Starter Member

    May 11, 2009
    20
    0
    I need an optocoupler which could tolerate a current at least 1A. how should I find it?
    thanks for your help:)
     
  2. Tahmid

    Active Member

    Jul 2, 2008
    344
    25
    Hi,
    You can use MOSFET driving opto-couplers such as TLP250, HCPL3120, TLP251, 6N136, etc.
     
  3. bertus

    Administrator

    Apr 5, 2008
    15,646
    2,345
    Hello,

    Is the output AC or DC?
    What voltage should be switched?

    Greetings,
    Bertus
     
    Last edited: Jul 27, 2009
  4. DC_Kid

    Distinguished Member

    Feb 25, 2008
    638
    9
    there are lots to choose from. search digikey or newark for some examples. many are opto-fet ("ssr"). you should be able to find 1A in SMT.
     
  5. hgmjr

    Moderator

    Jan 28, 2005
    9,030
    214
    I imagine from your request about driving the LED emitter side of an optocoupler with so much current that you are trying to span a significant distance between the emitter and the detector. If I am correct in this interpretation then you may want to consider solving your intensity problem by using a cluster of LEDs driven by the same control signal. This would allow you to drive each LED at a more conventional drive current level. I still think you would benefit from pulsing the drive to the LEDs as recommended by bertus since that would allow you to detect your signal in the presence of a significant level of ambient light. Of course that will add some complexity to your receiver since it will need to be designed to detect a time-varying signal from the LED light source.

    hgmjr
     
  6. DC_Kid

    Distinguished Member

    Feb 25, 2008
    638
    9
    not too complex. a 555 setup as a missing pulse detector on receiver side can easily integrate.
     
Loading...