2N3726

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2N3726 Application Field and Working Principle

The 2N3726 is an NPN transistor array housed in a TO-5 package for general-purpose switching and amplification applications. As part of an NPN transistor array, it is part of Siliconix’s VN4107A series of arrays. The 2N3726 is ideal for applications such as data processing networks, television transmitters, instrumentation amplifiers, and digital logic circuits. These types of arrays are typically used in circuits where tight control of current and voltage is required, as is the case with high side switching.

Features

The 2N3726 is a high current switching transistor array composed of two NPN transistors and two resistors in a single package. Each of the transistors has a gain of 10 and a maximum collector current of 1A. The array can be used in combination with a driver in applications such as relays, solenoids, ADC interfacing and motor control systems. The features of 2N3726 are high current switching up to 1A, low voltage operation (from 4.5 volts), high input impedance and low output impedance, provide of stabilized output voltage, and protection against supply variations.

Working Principle

The array is used to control the current flow through the circuit by providing a current path from the base/collector of one transistor to the base/emitter junction of the second. The basic operation of the array is identical to that of a single NPN transistor. In the simplest common-base configuration, the gate acts as a current source, turning on the transistor and thus passing current from the supply to the emitter. When the base/collector is biased with negative current, the transistor is turned off and the current through it stops. This action is then repeated by the second transistor in the array, stabilizing the overall current flow.

The current gain of an array is determined by its load resistance, the gain of each transistor, and the current load on the output. The current capability of an array is affected by its voltage requirement, the gain of each transistor, and the output current load. This array delivers a high level of current to the load, making it suitable for difficult loads, such as solenoids and other inductive motors.

The array has a maximum collector current of 1A, so it is capable of driving higher current loads than a single-transistor array. This makes it ideal for applications such as relays and motor control systems. The 2N3726 also features a maximum voltage rating of 30V, so it can be used in a wide range of operating conditions.

Applications

The 2N3726 can be used in a variety of applications where high current switching and amplification are required, such as:

• Data processing networks
• Television transmitters
• Instrumentation amplifiers
• Digital logic circuits
• Relays
• Solenoids
• ADC interfacing
• Motor control systems

Conclusion

The 2N3726 array is an NPN transistor array that is suitable for a variety of applications requiring high current switching and amplification. It features a maximum collector current of 1A and a maximum voltage rating of 30V, and can operate over a wide range of conditions. It is suitable for use in data processing networks, television transmitters, instrumentation amplifiers, and digital logic circuits, as well as in relays, solenoids, ADC interfacing, and motor control systems.

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