input protection with optoelectronic isolator circuit

Published:2011/5/29 7:11:00 Author:chopper | Keyword: optoelectronic isolator, input protection | From:SeekIC

This circuit combines diode and transistor together.When the input voltage is between 3 and 30V,the incoming current of LED of the optoelectronic isolator MOC3011 is limited to a secure ultimate value that is less than 15mA.If the polarity is set reversely by accident,this circuit can also protect the LED.



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