CMOS_INTERFACE_USING_OPTOlSOLATOR

Published:2009/7/2 20:18:00 Author:May | From:SeekIC

Provides logic control of 350-mA lamp. High level on input of typical CMOS inverter energizes 4N25 optoisolator, to clamp Q1 off. This removes drive from Q2, deenergizing load.Logic 0 at input reverses conditions, tuming on lamp. With values shown, 10 mA at optoisolator input controls completely isolated 350-mA load.-A. Pshaenich, Interface Techniques Between lndustrial Logic and Power Devices, Motorola, Phoenix, AZ, 1975, AN-712A, p 16.



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