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Four common types of chip inductors

There are four main types of chip inductors, namely wound, laminated, woven and thin film inductors. Commonly used are both wire-wound and stacked types. The former is a product that is small in size for conventional wound inductors; the latter is manufactured using multi-layer printing skills and stacking production skills, and is smaller than a wound-type chip inductor, and is a product developed in the category of inductor components.

Winding type
It is characterized by a wide range of inductance (mH ~ H), high precision of inductance, low loss (that is, Q is large), high allowable current, strong inheritance of manufacturing skills, simple, low cost, but the disadvantage is Further miniaturization is limited. Ceramic-core wound-type chip inductors maintain a stable inductance and a suitably high Q at such high frequencies, thus occupying a place in the high-frequency circuit.
TDK's NL series inductors are wound type, 0.01~100uH, precision 5%, high Q value, which can meet the usual needs.
NLC type is suitable for power supply circuit, rated current up to 300mA; NLV type is high Q value, environmental protection (recycled plastic), can communicate with NL; NLFC has magnetic screen, suitable for power line.
2. Laminated type
It has excellent magnetic shielding, high sintered density and good mechanical strength. The disadvantages are low pass rate, high cost, low inductance and low Q.
Compared with the wound chip inductor, it has many advantages: the standard is small, which is beneficial to the miniaturization of the circuit, the magnetic circuit is closed, the surrounding components are not bothered, and the components are not bothered by the components, which is beneficial to the components. High-density equipment; integrated structure, high reliability; good heat resistance and weldability; regular shape, suitable for automatic appearance equipment production.
TDK's MLK type inductor has small standard, good solderability, magnetic screen, high-density plan, monolithic structure and high reliability; MLG type has small inductance and high-frequency ceramic, suitable for high-frequency circuits; MLK type operating frequency 12GHz, high Q, low inductance (1n~22nH)
3. Film slice
It has the characteristics of maintaining high Q, high precision, high stability and small volume in the microwave frequency band. The internal electrodes are combined on the same level, and the magnetic field distribution is combined to ensure that the device parameters after the mounting are not changed much, and excellent frequency characteristics are exhibited above 100 MHz.
4. Weaving appearance
The characteristic is that the inductance per unit volume at 1MHz is larger than that of other chip inductors, and the volume is small, and the simple device is on the substrate. Used as a miniature magnetic component for power handling.
In practice, it is necessary to choose the application according to the situation. It is necessary to consider the application effect and also consider the capital cost.

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