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Precautions for the use of chip inductors and application notes for ferrite materials
Inductors generally exhibit inductive characteristics, and the frequency characteristics of the chip inductors are at low frequencies. It only functions as energy storage and high frequency filtering. However, at high frequencies, the impedance characteristics are very obvious. There are energy consumption and heat, and the inductive effect is reduced. The high frequency characteristics of different chip inductors are different.
It is also the impedance characteristics, etc., ☆ wet and dry, high and low ambient temperature, high frequency or low frequency environment, and the inductance of the inductor. Pay attention.
And the corresponding fever. ☆ The maximum current that the chip inductor is designed to withstand.
Compare the magnetic ring part above, ☆ when using a magnetic ring. Find the corresponding L value, corresponding to the scope of use of the data.
☆ Pay attention to the common enameled wire of wire (enamel wire, yarn package or bare wire). To find the most suitable line.
Inductance of ferrite material:
1. This material has a high magnetic permeability, and the ferrite material is an iron-magnesium alloy or an iron-nickel alloy. The chip inductance can be minimized between the coil windings of the inductor and the high frequency and high resistance. Ferrite materials are often used at high frequencies because of their main inductance characteristics at low frequencies, resulting in low losses on the line.
2. Mainly in the electrical impedance characteristic ratio and change with frequency. In practical applications, at high frequencies. The ferrite material is used as a high-frequency attenuator for the RF circuit. Actually, the ferrite is preferably equivalent to the parallel connection of the resistor and the inductor. The low-frequency chip inductor is short-circuited by the inductor, and the impedance of the chip inductor becomes high-frequency. So high that the current passes through the resistor.
3. The high frequency energy is converted into heat energy on top, and the ferrite is a consumer. This is determined by his resistance characteristics.
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