LLSTR-18

Fixed inductors, such as the LLSTR-18, are typically used in many applications including small electronic signal circuits, audio frequency circuits, and some sin wave filter circuits. They are also essential components of high frequency and high power oscillating circuits. While all inductors work on the same basic principle of inducing a magnetic field from an electrical current, fixed inductors include a core to minimize losses caused by manhy other factors in more complex circuits and designs.

Inductor Basics

An inductor is a passive two-terminal electronic component which, when connected to an electric current source, creates a magnetic field. This magnetic field induces a voltage across the terminals of the inductor and is proportional to the rate of change of the current through the inductor\'s terminals. This voltage, known as a ‘back EMF’, opposes the change in the current and, at a steady current, there is no voltage induced across the terminals.

Inductors follow Faraday’s Law which states that the inductance (L) is equal to the ratio of the amount of the magnetic flux (Φ) to the strength of the current (I) inducing it. This means that the higher the value of the inductance (L), the more stable the current will be in a circuit. The inductance of an inductor is measured in henries (H).

LLSTR-18 Application Field and Working Principle

The LLSTR-18 is one of the many fixed inductors that are widely used by engineers and technicians in various application fields. This inductor is manufactured with a wide range of values, varying from 2.2 μH to 66 μH, and a wide range of features, such as high self-resonant frequency (SRF), low DC resistance (DCR), and high ripple current capabilities.

The working principle of the LLSTR-18 is similar to that of other inductors. When a current is passed through the inductor, the core materials (usually ferrite material) create a magnetic field. This field induces a back EMF which opposes the current flowing through the inductor, thus stabilizing it. This property makes fixed inductors such as the LLSTR-18 ideal for use in filter circuits where high stability and low ripple current must be achieved.

The LLSTR-18 is a perfect choice for applications that require a good combination of stable performance, high current rating, and low DCR. It is also widely used for RF circuits. Its small size and high current capability make it an ideal choice for use in complex circuits. For example, it is widely used as a filter in high frequency digital circuits that must maintain signal purity and noise suppression.

Conclusion

Fixed inductors such as the LLSTR-18 are widely used in many applications. They are designed with a core to minimize losses and provide a high level of stability and noise suppression. This makes them ideal for use in both RF and digital circuits. Their small size and high current capability also make them suitable for use in high power and high frequency applications.