LQW18AN7N2C80D

Fixed Inductors

Fixed inductors, also known as fixed chokes, are passive components that store energy, generally in the form of a magnetic field, in a wrapped wire coil. Inductance is measured in a unit called the Henry. Fixed inductors are used in filters, radio frequency, telecommunication and power line applications, voltage regulators, and tuning circuits, and can be used as chokes to reduce high-frequency noise.

The LQW18AN7N2C80D fixed inductor is a high-current inductor with a 47 μH inductance and a low DC resistance of 0.033 Ω at zero current. It features a wide operating temperature range from -40°C to 85°C, and its 0.075" × 0.087" × 0.067" SMD package facilitates direct board mounting. The LQW18AN7N2C80D inductor operates over a range of temperatures and frequencies and has good high-frequency performance with a lowest possible dc resistance.

Application Fields

The LQW18AN7N2C80D fixed inductor is suitable for a wide variety of application fields, including power converters and voltage regulator modules, DC-DC converters, transformer coil and inrush current limiters, three-phase inverters, high-power line amplifiers, and wireless communication systems. As an inductor designed for high-power applications, the LQW18AN7N2C80D inductor is commonly used in switching power supplies, magnetics, strobe converters, motor drives, and other power components.

The device has a high tolerance ratings and operates efficiently with high-frequency transitions, making it a suitable choice for powering high-end audio and video systems, computers, and home theater electronics. The LQW18AN7N2C80D inductor is an ideal choice for power components such as backlight power supplies and synchronous rectification designs.

Working Principle

Fixed inductors function by restricting the current flow from one end to the other while allowing for stored energy to flow freely in the opposite direction. The current in the inductor will induce a voltage that is proportional to the rate of change of the current, according to Ohm\'s law. The stored energy is manifested in the form of vaporized atoms of iron around the internal windings of the inductor.

The energy is transferred to the magnetic material when a current passes through the inductor, generating a magnetic field that is proportional to the current. As the current changes, the inductor\'s built-in magnetic element, or core, will also experience a change in its magnetic field, resulting in an opposing current. The inductor will thus restrict the flow of electric current without dissipating energy.

A fixed back-EMF is also produced when the current passes through the inductor, providing a buffer that is often seen as a counter-acting force, or counter-EMF. The back-EMF affects the overall current, causing a slower rise or fall of the current than expected. This is known as voltage saturation and helps protect the inductor by preventing excessive current flow.

Conclusion

The LQW18AN7N2C80D fixed inductor is a versatile and highly efficient device suitable for a variety of applications, ranging from high-power line amplifiers to DC-DC converters. Its wide operating temperature range and high tolerance ratings make it an ideal choice for applications requiring a reliable power source. The LQW18AN7N2C80D inductor functions by producing a magnetic field and opposes the flow of electric current, providing a buffer to protect the device from excessive current flow.