Title :
A monolithic optically isolated zero crossing triac driver
Author :
O´Neil, Patrick, II ; Alonas, Paul G. ; Gilbert, David M.
Author_Institution :
Motorola Semiconductor Group, Phoenix, Arizona
Abstract :
This paper presents a description of an optically coupled device designed to drive triacs operating from the normal 115VAC line. The device provides optical isolation of the line triac from the logic trigger signal, and in addition performs the logic necessary to provide triac triggering only at the zero crossing of the AC line voltage. Theory of operation of the device and applications are presented.
Keywords :
Circuits; Contacts; Couplings; FETs; Light emitting diodes; Logic devices; Optical sensors; Phototransistors; Threshold voltage; Thyristors;
Conference_Titel :
Electron Devices Meeting, 1978 International
DOI :
10.1109/IEDM.1978.189414
