Norton_lamp_relay_driver_300_mA_loads

Published:2009/7/25 1:36:00 Author:Jessie | From:SeekIC

This circuit is similar to that of Fig. 11-10, except that the load capability is increased to 300 mA. R1 and R2 hold Q2 off when the Norton OTA output is high. R2 limits the base drive when Q1 goes on. Pin 14 must tie to the same power supply as the emitter of Q1 to guarantee that Q1 can be held off. For inductive loads, such as a relay coil, a backswing diode must be added to prevent large inductive voltage kicks during the on/off switching interval.



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