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Main performance indicators of the characteristics of chip inductors and power inductors
Jun 14, 2018



Main performance indicators of the characteristics of chip inductors and power inductors


  Chip inductors, also known as power inductors, high current inductors, and surface mount high power inductors. Features such as miniaturization, high quality, high energy storage and low resistance. The circuit mainly plays the role of turbulence, push, filtering, tuning, delay, compensation and so on.


 Power Inductance: The power inductor is mainly composed of a magnetic core and a copper wire. It is divided into two kinds of packages with a magnetic cover and no magnetic cover, or shielded power inductors and open power inductors. The power inductor is mainly used in the circuit. To the role of filtering and oscillation.

 

surface mount high power inductors.png

Chip inductors are also known as chip inductors or chip inductors; they are a form of structure in inductors; mainly turbulent in the circuit; decoupling; filtering; tuning; delay; compensation, etc.


 The power inductor is mainly composed of a magnetic core and a copper wire; it is divided into two kinds of packaging methods with a magnetic cover and no magnetic cover; or shielding

Power inductors and open power inductors; power inductors primarily function as filters and oscillations in the circuit.

 What is the characteristics of the chip inductor and the power inductor?

 

        The main performance indicators of chip inductors and power inductors are: inductance and allowable deviation, temperature coefficient, DC resistance, Q factor, rated current, etc.


Inductance

        Inductance refers to the characteristic that the inductor blocks the current change by converting the current change into the induced electromotive force; the chip inductor is the same as the basic unit of the inductance in the power inductor; the unit is Henry, the unit is the American physicist Joseph Henry's name, referred to as "Heng", is indicated by the letter "H"; common units are: Heng; milliheng; Weiheng; Naheng; in order, the conversion between them is 1000.

 

Allowable deviation

        The allowable deviation refers to the allowable maximum deviation range between the nominal inductance of the inductor and the actual inductance; in practical applications; the inductor with the smaller deviation is allowed; the higher the inductance accuracy of the inductor; the better the stability; However, its production or cost is relatively high. At present, the distribution range of chip power inductor inductance is wide; and the range of different types of power inductor inductance is different; for example, the power supply inductance gain industry in the PRD range; the inductance range is applied to Tongzhou, Haier, Hewlett-Packard, Huawei ; the United States; Kyushu; Skyworth; Gree and other brands of consumer electronics; truly achieved a wide range of inductance distribution characteristics.

 high energy storage inductor.png

 Temperature Coefficient

        Factors that affect the difference between the nominal inductance and the actual inductance; in addition to the deviation between the two at room temperature; there is also the temperature drift of the inductance caused by temperature changes; usually; due to ferrite The magnetic permeability has a large temperature coefficient and temperature nonlinearity; therefore, when it is necessary to pay attention to the temperature drift of the inductance; the ferrite patch laminated inductor and the ferrite core-wound chip inductor Special considerations are given; the temperature drift of the inductance coefficient of the chip power inductor is much smaller.

       

 DC Resistance

        The DC resistance is the resistance that the component is connected to with direct current, that is, the inherent, static resistance of the component. For example, the coil, through direct current and alternating current, it presents a different resistance, through the alternating current, the coil in addition to the DC resistance, there is a reactance, which reflects the cooperation of resistance and reactance, called impedance.


 The Q factor is also called the quality factor of the inductor and is the main parameter for measuring the inductance device. Refers to the ratio of the inductive reactance exhibited by the inductor to its equivalent loss resistance when operating at an AC voltage of a certain frequency. The higher the Q value of the inductor, the smaller the loss and the higher the efficiency.

      

 Rated current

 The rated current is the current that the appliance operates at the rated voltage. It refers to the maximum current allowed to pass for a long time under the rated ambient operating temperature under the rated ambient operating conditions.


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