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2256-17L Application Field and Working Principle

The 2256-17L is a type of fixed inductor, which is a passive two-terminal electrical component used to store energy in the form of a magnetic field. It is commonly used in electronic equipment, such as telephones, to suppress voltage spikes in the circuit board. The value of an inductor is inversely proportional to its physical size, which means that smaller sized inductors can store more energy in a given space.

Application Field

The 2256-17L is designed for use in a wide range of electronic equipment, including switch mode power supplies, switching regulators, radio communications, and other types of systems. The 2256-17L also features a high common-mode impedance, which makes it suitable for many audio frequency circuits. Additionally, the 2256-17L can be used to filter out unwanted signals in some applications.

Working Principle

Like all inductors, the 2256-17L works by storing energy in the form of a magnetic field. When an alternating current is applied to the inductor, the current will induce a changing magnetic field which in turn will induce a voltage in the wire. This voltage causes a current to flow, and the result is an opposing current also known as a “back-emf”. The back-emf counteracts the direct current, resulting in an opposing voltage. As the frequency of the alternating current increases, so does the magnitude of the opposing voltage.

The back-emf is the basic principle behind all electrical induction. It is also the reason why inductors are used for voltage suppression and other low-frequency applications. The opposition caused by the inductor effectively short-circuits any high-frequency currents and ensures that they are not passed on to sensitive parts of the circuit. In this way, the inductor acts as a “gatekeeper” between the power supply and other parts of the circuit.

Conclusion

The 2256-17L is a type of fixed inductor that is commonly used for suppression of voltage spikes in circuit boards and for filtering out high-frequency signals. It has a high common-mode impedance, making it suitable for many audio frequency circuits. The 2256-17L works by inducing a back-emf which opposes the direct current and limits the voltage passing through the inductor. This ensures that only low-frequency signals reach the rest of the circuit, protecting sensitive components from damage.

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