I need an optocoupler which could tolerate a current at least 1A. how should I find it?
thanks for your help

 

Hi,
You can use MOSFET driving opto-couplers such as TLP250, HCPL3120, TLP251, 6N136, etc.

 

Hello,

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

Greetings,
Bertus

 

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.

 

I need an optocoupler which could tolerate a current at least 1A. how should I find it?
thanks for your help

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

 

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

not too complex. a 555 setup as a missing pulse detector on receiver side can easily integrate.