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With the development of modern industry, inductors are becoming more and more important, which are closely related to people’s daily necessities, and patch inductors become one of the main forces in circuit operation and play an irreplaceable role.

Recently, Huizhou Mingda received feedback from customers, saying that SMD inductor has a problem of loud noise, which made them very distressed. Next, let introduce how to reduce the noise caused by SMD inductor.

There are three main reasons for the high noise of SMD inductor

1. Look at the current waveform of the inductor. If the waveform is normal, it is the quality problem of the inductor. If the waveform is abnormal, it is necessary to debug the circuit.
2. Check whether the current of the circuit and the wire diameter of the inductor match the current that can be passed, and then check the winding and process of the inductor, such as whether the winding is too loose or the product is well fixed.

3. . The physical source of inductor noise is magnetoelasticity, which is amplified before transmission, and is also caused by audio.

The occurrence of noise is basically inexplicable and cannot be completely avoided. However, it is the simplest and most useful way to find ways to reduce, and avoid audio to solve the customer’s problem. Generally, cutting off the communication path is the simplest and most useful way, such as immersing in varnishes, strengthening the glue, making the line more solid, changing the magnetic elasticity or the iron core with less magnetic leakage, and so on.
From this article， we can see the reason why SMD inductor makes noise. In order to reduce noise, SMD inductor should be used correctly, which can not only improve its working efficiency, but also improve its life span! In short, the main reason for the high noise is still the quality of SMD inductor.

The above is all about the “three main reasons for the high noise of SMD inductor”. If you want to know more details, please consult MingDa customer service.