2N6990

Series:	--
Packaging:	Bulk
Part Status:	Active
Transistor Type:	4 NPN (Quad)
Current - Collector (Ic) (Max):	800mA
Voltage - Collector Emitter Breakdown (Max):	50V
Vce Saturation (Max) @ Ib, Ic:	1V @ 50mA, 500mA
Current - Collector Cutoff (Max):	10µA (ICBO)
DC Current Gain (hFE) (Min) @ Ic, Vce:	100 @ 150mA, 10V
Power - Max:	400mW
Frequency - Transition:	--
Operating Temperature:	-65°C ~ 200°C (TJ)
Mounting Type:	Surface Mount
Package / Case:	14-Flatpack
Supplier Device Package:	14-Flatpack

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2N6990 Application Field and Working Principle

Introduction

The 2N6990 is a versatile and popular NPN array transistor from the bipolar junction transistor (BJT) family. It features two circuitry elements; a Darlington configuration for high current applications and a common-emitter configuration for low noise and high speed. The array transistor\'s applications include amplifiers, switches, buffers, and relay plans, among others. Aside from its versatility, it is also notable for its low on-state resistance, high gain, and low power dissipation. This article discusses the application field and working principle of the 2N6990.

Application Field

The 2N6990 can be applied in a variety of ways. Firstly, it is commonly used as an amplifier due to its relatively high gain, low power dissipation, and low noise. It can also function as a switch, acting as a buffer between the circuit\'s input and output circuits. This functions to reduce interference between them and also augments the circuit\'s speed. Another popular application for the 2N6990 is as a relay driver. As a relay switch will normally take very high voltage devices, its design has to be extra robust and reliable. Array transistor transistors are commonly used to build such drivers due to their high temperature operating ranges and anti-static protection. Furthermore, it has applications in the protection of electronic devices. It can act as a fusible switch, allowing circuit systems to be "fused" in case of an overload. It can also act as part of overvoltage, overcurrent, and reverse polarity protection circuits, where it can be used to shut down or limit the amount of current passing through to protect the circuit board. Finally, the 2N6990 array transistor can be used as a precision integrated timer, providing precise timing and control over a circuit board\'s components. In this application, the 2N6990 acts as a switch, allowing control over the input and output of the Timer component.

Working Principle

The 2N6990 array transistor consists of two component transistors in a Darlington configuration. This is a combination of two NPN transistors coupled in such a way that the characteristics of one transistor amplifies the characteristics of the other, amplifying the current gain and reducing the output resistance of the circuit. The array works by controlling the base-emitter voltage of the first transistor, which in turn controls the voltage of the second transistor. The Darlington configuration of the 2N6990 provides an extremely high gain and allows the use of short circuit protection. This means that if a short-circuit occurs in the output, the voltage across the transistors remains within a safe range, preventing damage to the circuit. In addition, it is also less susceptible to "thermal runaway", where the voltage of the two transistorsThe Darlington array transistor can easily be used to control heavy loads such as motor control, relay switches, and lamps. It is ideal for controlling large currents, and when used with a suitable driver circuit, it can switch high voltages and low currents. In addition, the 2N6990 array transistor is highly reliable and has very low parasitic components. This ensures that the transistor lasts longer, can operate at higher temperatures, and dissipates very little power, reducing the risk of overheating.

Conclusion

The 2N6990 array transistor is a versatile and popular NPN array transistor from the bipolar junction transistor (BJT) family. It can be applied in a variety of ways, including as an amplifier, switch, buffer, relay driver, and precision integrated timer. Its high current gain and low power dissipation makes it ideal for applications such as motor control, relay switches, and lamps. It is highly reliable and has very low parasitic components, ensuring that the transistor can be used in a wide range of environments.

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