LQM21PNR47MG0D

Fixed Inductors

Fixed inductors are passive electronic components that, when exposed to an alternating current, create a magnetic field. In general, inductors are made of a coil of wire wound around a core material that allows the magnetic field to induct, or transfer, energy from one circuit to another. The type of inductor used in a particular circuit design depends on the application of the inductor and the desired performance.

LQM21PNR47MG0D is a type of fixed inductor made from a ferrite core and coated in a potting compound. The potting compound creates a moisture-resistant seal, allowing for excellent electrical performance under damp or humid environments. The inductance range is between 1.0uH to 47.0uH, with a maximum current rating of 1.16A.

Application Field and Working Principle

LQM21PNR47MG0D is commonly used in switching power supplies, resonant circuits, and DC/DC converters. The component is also used in choke coils, EMI filtering, timing circuits, and frequency-dividing circuits. Its main application is to reduce high-frequency noise, smooth out voltage changes, and improve current efficiency and stability in the circuit.

The principle of operation of the inductor is based on Faraday’s Law of Electromagnetic induction. Faraday’s Law states that an electric current flowing through a loop of wire will cause a magnetic field to be generated around the loop. The more current that flows through the loop, the stronger the magnetic field will be. The strength of the magnetic field created by the inductor is measured as inductance, and this is the primary function of the inductor in a circuit.

When an alternating current flows through the inductor, the inductor’s magnetic field will oppose the current, creating a back EMF (electromotive force). This back EMF will effectively slow down the flow of current, allowing for greater control over the flow of current in the circuit. This is why inductors are commonly used in the switching power supplies of many electronic devices to ensure that the power is distributed at a constant rate.

The combination of the ferrite core and the potting compound used with the LQM21PNR47MG0D fixed inductor provides excellent electrical performance and durability, making it an ideal choice for a wide range of applications. Its small size and low cost make it suitable for many cost-sensitive projects as well.