LQM21DN100N00D

DC Resistance (DCR):	500 mOhm Max
Height - Seated (Max):	0.041" (1.05mm)
Size / Dimension:	0.079" L x 0.049" W (2.00mm x 1.25mm)
Supplier Device Package:	0805 (2012 Metric)
Package / Case:	0805 (2012 Metric)
Mounting Type:	Surface Mount
Inductance Frequency - Test:	1MHz
Operating Temperature:	-40°C ~ 85°C
Ratings:	--
Frequency - Self Resonant:	24MHz
Q @ Freq:	--
Series:	LQM21
Shielding:	Shielded
Current - Saturation:	--
Current Rating:	15mA
Tolerance:	±30%
Inductance:	10µH
Material - Core:	Ferrite
Type:	Multilayer
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction to Fixed Inductors

Inductors are electronic components used to store and control electric energy. Fixed inductors are used in many types of electronic applications and come in many sizes, shapes and types. They are commonly used in power supplies, signal processing filters, and impedance matching circuits to regulate or modify voltage and current. The LQM21DN100N00D is an example of a fixed inductor type that operates based on Faraday\'s Law of Induction.

The LQM21DN100N00D

The LQM21DN100N00D is a widely used SMD (Surface Mounted Device) type, axial leaded, fixed inductor. It has a 37.7×24.6mm package size, with 12.7mm lead length and a coil current of 100mA maximum. It has a rated inductance of 10μH ±10%, a maximum DC resistance of 8 mΩ, and a Q-factor of >12 at 300KHz. The LQM21DN100N00D has a rated current of 0.36A and a self-resonant frequency (SRF) of 26.7MHz. It is rated for a maximum operating frequency of 300KHz and a maximum operating temperature of +125°C.

Application of the LQM21DN100N00D

The LQM21DN100N00D is commonly used in DC/DC converters, power supplies, LC filters, and impedance matching circuits. It is suitable for both AC and DC applications, and is well-suited for power line filtering. It is also used in radio frequency (RF) circuits, in which its SRF and Q-factor make it an ideal choice for high frequency performance. The LQM21DN100N00D is often used as an inductor in switched-mode power supplies, where its power rating and DC resistance are especially important. Due to its excellent self-resonant frequency and current ratings, the LQM21DN100N00D is ideal for high frequency circuit designs, such as in synchrophasors, wireless modules, and pulse transformer circuits.

Working Principle of the LQM21DN100N00D

The working principle of the LQM21DN100N00D is based on Faraday\'s Law of Induction. Faraday\'s Law states that a changing magnetic field will induce a current in an adjacent wire. This is due to the interaction between the magnetic flux and the current in the wire, whereby a changing current in the wire will cause a change in magnetic flux, and vice versa. By winding a wire into a coil, the number of turns of the coil increases the magnetic force created from the coil’s current, and the inductance increases. The LQM21DN100N00D uses this principle to produce an impedance, or resistance, to a current signal based on the amount of turns of the coil and its current. When a current flows in the coil, a magnetic field is generated, and this magnetic field will oppose the flow of current, resulting in an impedance. By controlling the number of turns and the current in the coil, the impedance produced can be precisely controlled.

Conclusion

The LQM21DN100N00D is a widely used fixed inductor SMD type that has been designed to provide excellent performance in high frequency designs. With its 37.7×24.6mm package size, 12.7mm lead length, 10μH ±10% inductance, 8 mΩ maximum DC resistance, 0.36A rated current, a Q-factor of >12 at 300KHz, and a self-resonant frequency (SRF) of 26.7MHz, it can be used in DC/DC converters, power supplies, LC filters, and impedance matching circuits to provide precise impedance control. The LQM21DN100N00D works based on Faraday\'s Law of Induction, which states that a changing magnetic field will induce a current in an adjacent wire, and that a coil\'s current will cause a change in magnetic flux, and vice versa. With its reliable performance and wide range of possible applications, the LQM21DN100N00D is an invaluable component for many circuit designs.

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