1840R-22F

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Fixed inductors are primarily used for electromagnetic energy storage, various power filtering requirements, pulse transformer and other related applications. The 1840R-22F inductor is a common type of fixed inductor, designed for low-loss operation over a wide temperature range. Works up to 175oC.

The 1840R-22F Fixed Inductor is a non-polarized device that produces relatively constant inductance over frequency and temperature. Also, this type of inductor can be used in DC-to-DC, AC-to-DC and other power conversions, as well as low-noise circuits for signal processing. Its series inductance is 850µH to 9500µH, with DC resistance of 0.7 to 1.4ohms.

The 1840R-22F is composed of two coils of copper wire wound around a ferrite core, which is why it has excellent EMI/RFI filters performance and is perfectly suited for applications where radiated emissions must be reduced. The core governs the inductance of the 1840R-22F and the frequency of the working voltage. The coil configuration is connected in series to reduce the effect of the external environment on inductance. The 1840R-22F has the highest inductance among surface mount inductors and maintains a relatively constant inductance against temperature. The inductance variation of the 1840R-22F from -55℃ to +130℃ is only ±20% and the temperature coefficient is usually less than 550ppm/℃, which indicates good stability against temperature.

The 1840R-22F is also designed to enhance the power supply\'s stability and reliability in the circuit. In DC-DC converter applications, the 1840R-22F is usually used as a low-loss output filter, where the input current is filtered and supplied to the load part without greatly lowering the output voltage.

The working principle of the 1840R-22F Fixed Inductor is based on the principle of inductance. When a voltage is applied to the inductor, a magnetic field is generated in its core. This magnetic field is then linked to the established loops, which in turn causes a current to circulate in the loops, resulting in additional field generated by the current.

This magnetic field then works against the current flow, resulting in the reduction of the current\'s rate of change. This is known as inductive reactance. The magnitude of the inductive reactance is calculated by using the formula XL=2×PI×F×L, where F is the frequency of the current and L is the inductance value. The inductive reactance produced by the 1840R-22F is fairly constant with respect to frequency and dominates the total reactance.

Generally, the 1840R-22F Fixed Inductor works in DC-to-DC converters as a high frequency filter to reduce noise and improve efficiency and stability. The inductor also compensates the variation of inductance due to temperature changes. The 1840R-22F is an ideal choice for applications requiring small size, low loss, and temperature stability.

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