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optocoupler input saturation current

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vlad777

Member
What optocoupler has the lowest led diode input current
that brings the output transistor to saturation?
CNY17 has 10mA.
I am connecting the input to 220V 50Hz so I need
low input led current to save watts of the input
resistor.
 

MrAl

Well-Known Member
Most Helpful Member
Hi,

This partly depends on what the load will be. What are you connecting
to the output?
There are many opto's out there, but i think 1ma might be a good lower
limit to count on, provided you can rig the output to only draw 1ma too.
I guess you only need 50Hz frequency response then too?
 
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