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Fixed Inductors

An inductor, also known as a coil or a reactor, is an electrical device used in many types of circuits for storing energy in the form of a magnetic field. In particular, fixed inductors are inductors that use a fixed coil, or non-electrically adjustable resistive element, as the source of their inductance.

LQW18ANR33G80D Application Field and Working Principle

The LQW18ANR33G80D is a fixed inductor in an 1812 surface-mount package (imperial size designator equivalent to 3.17 × 1.5 mm or 0.125 × 0.06 inch). It has an inductance of 0.33 microhenry (mH) with a tolerance of 10%, and an operating temperature range of -55°C to +125°C. It is ideal for use in circuits requiring low loss and low inductance values, such as synchronous buck converters, pulse-width modulation (PWM) controllers, DC/DC converters, active-bridge circuits, high-frequency switching power management, fast switching regulator circuits, and more.

The principle of operation of a fixed inductor is based on the relationship between a coil of wire, the current flowing through the coil, and the resulting magnetic field. When current passes through the coil, a magnetic field is created around the coil that causes the coil to resist the change in the current’s direction. This magnetic field is what produces the inductance of the component, which can be measured with an ohmmeter.

The LQW18ANR33G80D fixed inductor is designed with a non-conductive ferrite core that minimizes eddy-current losses and provides higher inductance with lower power consumption. It also has an axial lead for easy mounting and short-circuit protection. Additionally, the device is lightweight and slim, making it suitable for use in compact electronic designs.

Typical Applications

Typical applications for the LQW18ANR33G80D include buck- and boost-regulated DC/DC converters, active bridge circuits, PWM controllers, high-frequency switching power management, and general-purpose inductors for high-current and ultra-low-voltage SMPS (Switch Mode Power Supply). Other uses include power filters for noise suppression, low-distortion radio frequency (RF) amplifiers, impedance matching, and antenna impedance tuning. Fixed inductors such as the LQW18ANR33G80D are also used as components in battery chargers, waveform generators, and waveform-shaping circuits, as well as in various automotive and communication systems.

Conclusion

The LQW18ANR33G80D fixed inductor is a versatile component that can be used in a variety of applications requiring low loss, low inductance values, and short-circuit protection. Its non-conductive ferrite core helps minimize power consumption and increase inductance, and the device’s small form-factor makes it suitable for use in compact designs. Such features make the LQW18ANR33G80D an ideal component for automotive, communication, power management, and many other applications.

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