78FR22K-RC

DC Resistance (DCR):	75 mOhm Max
Height - Seated (Max):	--
Size / Dimension:	0.110" Dia x 0.280" L (2.79mm x 7.11mm)
Supplier Device Package:	Axial
Package / Case:	Axial
Mounting Type:	Through Hole
Inductance Frequency - Test:	25MHz
Operating Temperature:	-55°C ~ 105°C
Ratings:	--
Frequency - Self Resonant:	380MHz
Q @ Freq:	40 @ 25MHz
Series:	78F
Shielding:	Unshielded
Current - Saturation:	--
Current Rating:	1.15A
Tolerance:	±10%
Inductance:	220nH
Material - Core:	Ferrite
Type:	Wirewound
Part Status:	Active
Packaging:	Bulk

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Fixed Inductors

A fixed inductor is an electronic component that stores energy within a conductor. It is an essential part of circuit designs, whether they are used to decrease voltage or increase it through phase-shift capacitance. One type of such a component is the 78FR22K-RC, which comes with a variety of applications and a working principle that are relatively easy to understand.

Design

The 78FR22K-RC is a radial fixed inductor, which means it has a core built from a conduction or ferromagnetic material, and it has coils wrapped around it. This design provides the best use of the component’s energy by maximising coupling between the core and coils. It also manages to keep the inductor size small.These components typically include two pins, with an overall height of 7.5mm and a diameter of 3.2mm. Most operate between -40°C and +105°C, with the pins having a diameter of 0.63mm.

Applications

The 78FR22K-RC is best used for general-purpose electronics, voltage doubler circuits, DC-DC converters, switching power supplies, and many other types of circuits. It is especially useful in single-ended primary-inductor switching (SEPIC) topologies, as it can overcome some key problems in that design, such as high Common Mode (CM) noise.It is also used to reduce the internal noise and output ripple of LCDs, and to stabilise the image quality of Solar and LED applications. Additionally, it is suitable for automotive and consumer applications.

Working Principle

The 78FR22K-RC works because of Faraday’s Law. This law states that when a voltage passes through a coil, it creates a magnetic field which, in turn, produces an electromotive force (EMF) in either direction. This is called Self-Induction.Therefore, if positive voltage is applied to the 78FR22K-RC, the resulting magnetic field will cause the current through the coil to increase exponentially. However, if negative voltage is applied, the current through the coil will decrease exponentially. This also means that the 78FR22K-RC works as both an increasing and decreasing voltage regulator.

Features

The most important features of the 78FR22K-RC are its high accuracy, efficiency and stability. It has a maximum DC resistance of 0.0090Ω, which allows it to stabilise and reduce energy loss between the input and output. The inductance ranges from 4.7µH to 470µH.The component also has high power efficiency, with a maximum current of 1A, and a minimum saturation current of 0.14A. The rated voltage is 16V, and it has both a 20mV maximum drop-out voltage and a 27% maximum voltage change.

Conclusion

The 78FR22K-RC is a radial fixed inductor that offers a variety of applications and a relatively easy-to-understand working principle. It is best used for general-purpose electronics, voltage doubler circuits, DC-DC converters and switching power supplies. It is also useful for automotive and consumer applications.The component has a core built from a conduction or ferromagnetic material, and coils wrapped around it. It has two pins and operates between -40°C and +105°C. The component’s features include a high accuracy and efficiency, a maximum current of 1A, and a maximum DC resistance of 0.0090Ω.

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