Product Summary

The 2742B is an optically isolated isolated amplier which consists of the popular KA431 precision programmable shunt reference and an optocoupler. The optocoupler is a gallium arsenide (GaAs) light emitting diode optically coupled to a silicon phototransistor. And it is used in power supplies regulation, DC to DC converter.

Parametrics

2742B absolute maximum ratings: (1)Storage Temperature: -40 to +125 °C; (2)Operating Temperature :-25 to +85 °C; (3)Input Voltage:37 V; (4)Input DC Current :20 mA; (5)Collector-Emitter Voltage:70 V; (6)Emitter-Collector Voltage: 7 V; (7)Collector Current:50 mA; (8)Input Power Dissipation: 145 mW; (9)Transistor Power Dissipation:85 mW; (10)Total Power Dissipation :145 mW.

Features

2742B features: (1)Optocoupler, precision reference and error amplifier in single package; (2)2.5V reference; (3)CTR 100% to 200%; (4)2,500V RMS isolation; (5)UL approval E90700, Volume 2 ; (6)BSI approval 8661, 8662; (7)VDE approval 136616 ; (8)CSA approval 1113643; (9)Low temperature coefficient 50 ppm/°C max; (10)tolerance 1%.

Diagrams

2742B Diagram

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