SG3423

The SG3423 is designed as one kind of monolithic integrated circuits which provides the control functions necessary to protect sensitive electronic circuitry from over-voltage transients or the effects of voltage regulator failure. It is designed for use with an external SCR "crowbar" for immediate shutdown of the power supply, but additionally provides logic level outputs for regulator turn-off and/or operator or system out-of-tolerance indication.

SG3423 has six features. (1)Operation from 4.5V to 40V. (2)Highly accurate sensing threshold. (3)Built-in input hysteresis. (4)Programmable time delay. (5)SCR "crowbar" drive of 200mA. (6)Remote activation capability. Those are all the main features.

Some absolute maximum ratings of SG3423 have been concluded into several points as follow. (1)Its input supply voltage would be 40V. (2)Its sense voltage 1 input range would be Vin. (3)Its sense voltage 2 input range would be 6.5V. (4)Its reference load current would be 10mA. (5)Its indicator output voltage would be 40V. (6)Its indicator output current would be 50mA. (7)Its operating junction temperature would be 150°C. (8)Its storage temperature range would be from -65°C to 150°C. (9)Its lead temperature soldering 10 seconds would be 300°C. It should be noted that stresses above those listed in absolute maximum ratings may cause permanent damage to device.

Also some electrical characteristics of SG3423 are concluded as follow. (1)Its supply voltage range would be min 4.5V and max 40V. (2)Its supply current would be typ 5mA and max 10mA. (3)Its sense threshold would be min 2.45V and typ 2.60V and max 2.75V. (4)Its input hyteresis would be typ 25mV. (5)Its input bias current would be typ -0.3uA for sense 1 and would be typ +5uA for sense 2. (6)Its remote activation input current would be typ 5uA and max 40uA at Vpin5=2.0V and would be typ -120uA and max -250uA at Vpin5=0.8V. And so on. If you have any question or suggestion or want to know more information please contact us for details. Thank you!