TIP126 Discrete Semiconductor Products

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TIP126 Application Field and Working Principle

As one of the Transistors - Bipolar (BJT) - Single, the TIP126 is a silicon PNP power bipolar transistor that can be used for medium power switching, amplifier and general purpose applications. This transistor is ideal for use in industrial and consumer applications such as audio amplifiers, solenoid and relay drivers, DC-DC converters, and more.

The TIP126 is fabricated with a P-type substrate and has the ability to produce a large current gain due to its internal structure. The transistor has an emitters-base voltage rating of 60V and a collector-emitter voltage rating of 60V. It can also handle a continuous collector current of 5A, making it an effective and reliable choice for power requirements.

Working Principle

The principle function of a bipolar transistor such as the TIP126, is to amplify and switch electronic signals. The TIP126 is a PNP transistor, meaning that the voltage and current flow within the circuit is reversed compared to a NPN transistor.

The TIP126 consists of three terminals; the emitter, collector, and base. The role of the base terminal is to control the operation of the transistor, meaning that current flow between the collector and emitter is controlled by the amount of current flowing into the base.

To turn the transistor on and allow current to flow through it, a voltage is applied to the base terminal. A small current then flows from the base terminal to the emitter terminal and this causes a larger current to flow from the collector to the emitter terminal. This current amplification is the function of the transistor. When the base voltage is removed, the transistor is turned off and current no longer flows as desired.

Applications

Due to its excellent switching capability, the TIP126 can be used in switching applications where large currents must be controlled. This can be beneficial in DC-DC converters, motor drives, temperature controllers and more. The device is also used to amplify audio signals; due to its low external parts count, it is ideal for use in audio mixing consoles, receivers, amplifiers and other audio applications.

Furthermore, the TIP126 transistor can be used in automotive applications such as voltage regulators, power window regulators, power steering systems and ABS systems. Other common applications for the TIP126 include portable audio systems, linear regulators, and battery packs.

Conclusion

The TIP126 is a robust and reliable transistor from the Transistors - Bipolar (BJT) - Single family. It is capable of amplifying and switching large current flows in applications such as automotive electronics, motor drives, audio systems, and battery packs. It is an excellent choice for those looking for a powerful and efficient transistor for their next project.

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