MLF1608DR68JT000

Series:	MLF
Packaging:	Tape & Reel (TR)
Part Status:	Active
Type:	Multilayer
Material - Core:	Ferrite
Inductance:	680nH
Tolerance:	±5%
Current Rating:	70mA
Current - Saturation:	--
Shielding:	Shielded
DC Resistance (DCR):	1.25 Ohm Max
Q @ Freq:	15 @ 25MHz
Frequency - Self Resonant:	150MHz
Ratings:	--
Operating Temperature:	-40°C ~ 85°C
Inductance Frequency - Test:	25MHz
Mounting Type:	Surface Mount
Package / Case:	0603 (1608 Metric)
Supplier Device Package:	0603 (1608 Metric)
Size / Dimension:	0.063" L x 0.031" W (1.60mm x 0.80mm)
Height - Seated (Max):	0.037" (0.95mm)

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Fixed Inductors

Inductors enable current to be stored in the form of magnetic energy and, as a result, play a role in the generation of EMFs as well as in the control of current in a variety of power and signal paths. Fixed inductors are composed of an insulated core that contains a metal winding. They are available in a wide range of sizes, shapes, values, and tolerances, with the vast majority composed of SMDs (surface mount devices) with leads, and a few through-hole types still available. MLF1608DR68JT000 is one such fixed inductor, with a size of 1.6 x 0.8 mm specifically designed for space-constrained applications. It is comprised of 8 pins to provide the same inductance performance as its thorugh-hole counterpart and is ideal for high-frequency power converters, switch mode power supplies (SMPS), direct-current-to-direct-current converters (DC-DC), and high-frequency inductors. This fixed inductor operates on EMI/RFI suppression principles, where it is designed to eliminate or reduce electromagnetic interference that is caused by various radio frequency and electrical signals. In general, this is accomplished by the inductor providing a low impedance shunt path for the interference current, which minimizes the interference energy dissipated into the environment. The working principle of this fixed inductor is based on Lenz’s law and Faraday’s induction law. According to Lenz’s law, an emf is induced in a conductor when it moves through a magnetic field or when the magnetic field around it changes. Similarly, Faraday’s induction law states that this induced emf has an opposite polarity to that of the inducing magnetic field. This fixed inductor works by creating an inductance field in the winding, or coil, which generates an EMF when current flowing through it changes. This EMF then works to oppose the original current, reducing or eliminating the interference. In addition, the size of the inductor\'s magnetic field increases with a larger number of turns, making the inductor more effective at suppressing EMI interference. In order to ensure effective operation of the MLF1608DR68JT000, it is important to consider the operating temperature, which impacts the inductor\'s core resistance and inductance values. The ideal operating temperature for most SMD inductors is between -30°C and 105°C, as higher or lower temperatures can cause strong inductance variation. Moreover, the transistor\'s switch time will also impact the inductor\'s performance, especially when used in a power symmetry circuit, as this will increase the rapidity of the current through the inductor, requiring higher saturation current values than can be provided by the device. Finally, the inductor\'s stray capacitance must also be taken into consideration, as the electrical coupling between the inductor and other components also impacts the induction curve for EMI suppression. As such, it is important to ensure that the inductor\'s parasitic capacitance is minimized. In conclusion, MLF1608DR68JT000 is a fixed inductor designed for use in high-frequency power converters, switch mode power supplies, direct-current-to-direct-current converters, and high-frequency inductors. Its working principle is based on Lenz’s law and Faraday’s induction laws, and it can be very effective in reducing or eliminating electromagnetic interference. However, operating parameters such as temperature, switch time, and stray capacitance must be taken into account to ensure its effective functioning.

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