BD179 Discrete Semiconductor Products

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The BD179 is a single bipolar junction transistor (BJT) commonly used in audio amplifiers and switching circuits. It has a maximum collector-emitter breakdown voltage of 60V, a maximum power dissipation of 1.5W and a transition frequency of 10MHz.

The working principle of a BJT is based on the behavior of two pn-junctions which form a three-layered structure. The two layers which are created are known as the emitter and the collector and are connected to a third layer known as the base.

The biasing of the base is necessary to control the current flow in the transistor, which is given by the following equation:

I_C = β*I_B,

where I_C is the collector current and I_B is the base current. The β is the current gain of the transistor, also known as the β-factor.

The characteristics of the BD179 make it ideal for use in audio amplifiers, as it can provide good signal quality while operating with low power dissipation. For example, it can be used in a circuit that amplifies the output of an electric guitar pickup.

The BD179 is also popular for its use in signal switching circuits, such as in a DTMF decoder circuit. The DTMF decoder circuit works by detecting the frequencies of incoming tones and using the BD179 as a switch to decode them into digital signal. This signal can then be used to control other devices, such as a robot arm.

In addition to its use in audio amplifiers and signal switching circuits, the BD179 is also used in power circuits such as automotive electrical systems. This is because the BD179 can handle large current, can withstand high voltages, and has a high switching speed.

The BD179 is a versatile transistor that can be used in a variety of applications that require a low-power and high-performance solution. It is most commonly used in audio amplifiers, signal switching circuits and power circuits, but can also be used in other applications such as temperature control or switching circuits.

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