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What is the difference between patch shielding inductance and patch non-shielding inductance?
Apr 12, 2018


What is the difference between patch shielding inductance and patch non-shielding inductance?


From the structure of these two types of chip inductors, we can see the difference between them:


SMD shielded inductors usually use magnetic shielding or electromagnetic shielding methods to protect the wires, loops, and coils from the influence of external magnetic fields. SMD shielding inductance can also weaken the electromagnetic field generated by the circuit and cause interference to other components. .

 

SMD shielded inductors and non-shielded inductors are actually one open magnetic circuit and one closed magnetic circuit. The magnetic resistance of the open magnetic circuit is relatively large and the linearity is good, but the magnetic resistance of the closed magnetic circuit is small, and the nonlinearity is obvious. .


SMD shielded inductors can reduce the electromagnetic interference of the inductor for the outside world, while non-shielding inductors do not have this effect.

                     

The outer surface of the SMD shielded inductor is in the form of an iron shell, and the non-shielded inductor of the SMD has no iron shell surrounding the surface. Therefore, the shape of the non-shielded inductor of the SMD is of many types.

          SMD shielded inductors.png            non-shielded inductors.png

There is also a difference in the inductance of the inductor. The inductance of the non-shielded inductor of the chip is larger than the inductance of the chip-shielding inductor. If the inductance of the shield inductor is too large, the shielding performance of the shielded inductor of the chip will be generated. A certain influence.


The difference between the function and application of SMD shielded inductors and non-shielded inductors


The function of the non-shielded inductor of the patch is as follows: 1. The surface is easy to mount; 2. The solderability is strong; 3. The Q value is high; 4. The current is relatively high; 5. The raw material of the non-shielded ferrite core structure cost Low.


Non-shielded inductors for patch applications include: flashlights, digital cameras, MP3, MP4, digital recording, instrumentation equipment, LED lamps, toys, sports equipment and other products.

The function of the patch-shielding inductor is as follows: 1. Special gold-plated electrode end surface materials, 2. Strong welding reliability, 3. Closed magnetic circuit design, easy to install the surface, 4. Low magnetic leakage, low DC resistance, short and thin.


SMD shielding inductance applications include: LCD TVs, notebook computers, computer VDA graphics, mobile phones, small communications equipment, PDA, CATV.VCR.LCD drivers, portable DVD and other products.



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