TIP126D

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The TIP126D is a transistor that belongs to the single bipolar junction transistor (BJT) family. It is a widely used switching and amplifier device, utilized in a variety of applications. This article will examine the primary fields of application, as well as its working principle.

Classification & Physical Characteristics

The TIP126D is an NPN power transistor for general purpose switching applications. It is most commonly used in linear and switching regualtors, solenoids and relays drivers, lamps and LED drivers, and other wide range of applications such as AF and RF amplifiers.

The TIP126D is housed in a 5-pin, TO-220 plastic package. It has a power dissipation capability of up to 6W and is capable of withstanding currents up to 4A. It can also handle voltages up to 50V. Despite its robustness, the TIP126D is also compact, making it ideal for some smaller circuitry to operate.

Working Principle

At its simplest, a BJT is a three-terminal device that can be used to control electrical circuits and voltages. In the case of the TIP126D, it operates as a switch and can be used in circuits to control the flow of electrical currents. It consists of a base, a collector and an emitter.

The base is the controlling terminal and is responsible for the activation of the transistor. As current flows through the base, electrons are attracted to the base. This causes a surge of 16mA of base current, creating a current amplification effect across the transistor. As such, the application of small base current can result in large collector currents. This allows complex switching mechanisms to be created with the TIP126D.

In addition, the collector and emitter are the two output terminals and are responsible for the current flow. The collector acts as a power supply for the base, which controls the current flowing out of the emitter. This unidirectional flow of current allows for switching mechanisms to be applied to multiple electrical applications.

Applications

Due to its robustness and its simple operation, the TIP126D can be applied in a wide range of applications. It is mainly used for rectifiers, bridge circuits, motor control and linear and switching regulators.

In linear and switching regulators, the TIP126D is often used to provide the required power supply voltage to various components. It acts as a switch, which can turn on and off based on inputs. This is accomplished by applying a base current, which will then cause the current flowing out of the emitter to increase or decrease depending on the application requirement.

The TIP126D can also be used to control the speed of motor as it provides a good combination of low power loss and high power control. It is also often used as a driver for solenoids and relays, providing a suitable current level in order to switch them on and off. In addition, the TIP126D is also used in Brushless DC Motor Controllers, making it suitable for a wide range of applications.

Conclusion

In conclusion, the TIP126D is a highly robust power transistor with a wide range of applications. It has a power dissipation capability of up to 6W, can handle currents up to 4A, and can safely endure voltages up to 50V. In addition, it also has a good combination of low power loss and high power control for motor control and switching applications. As such, it is highly suitable for linear and switching regulators, solenoids and relays drivers, lamps and LED drivers, and other wide range of applications such as AF and RF amplifiers.

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