Patent ID: 6486485
Filing Date: 2002-11-26
Classification: H01L,H03K,H04B

Abstract:
An optocoupler, comprising:a driving triac; at least one normally-on driving element coupled to an output of the driving triac; a load coupled to the driving triac and the normally-on driving element; a light emitting element for receiving a first input current for turning on the driving triac and a light receiving element for turning on the driving triac based on an output from the light emitting element so as to supply the load with a load current for driving the load; and means for turning off the normally-on driving element; wherein the first input current is applied to the light emitting element at a time when a phase of the load current is substantially at 0Â°; and a second input current is applied to the normally-on driving element at a time when a phase of the load current is substantially at 90Â°.