The application of SMD inductors in mobile phones mainly involves analog digital filtering and high-frequency circuits, power inductors, and high-frequency inductors or high-frequency winding inductors.
In this new century and era, the Internet is indispensable, and mobile phones are indispensable electronic products of this era. Now mobile phones have become the most closely connected items between modern people.
At present, smartphones have become the electronic products that are most closely connected with people, and are also the main application force of chip inductors. According to professional data statistics, the demand for chip inductors in smartphones will reach 68 billion. Apple released a 30W power adapter this year. As we all know, Apple’s products have always been known for their high-quality raw materials and excellent workmanship.
The new 30W power adapter is equipped with 4 voltage gears, namely 5V/3A, 9V/3A, 15V/2A, and 20V/1.5A. The main functions of SMD inductors in smartphones are RF inductance, high-frequency filtering, signal amplification, etc. DC-DC power modules, LNA modules, SAW filter modules, AMPs, etc. used in smartphones.
There are two main types of SMD inductors in smartphones: SMD multilayer inductors and GNR magnetic rubber inductors. In addition, other types of SMD inductors are installed according to the needs of smartphone functions.
For example, common mode inductors play a vital role in power circuits, used to filter out common mode electromagnetic interference signals in power circuits, and act as EMI filters in circuit boards. Generally speaking, common mode inductors are mainly used to isolate high-frequency crosstalk between the inside and outside of electrical appliances.
The picture includes the internal structure of a Samsung phone (lower left), and the upper part of the picture shows the internal structure of the Honor 3. Comparing the two phones, we can find that:
There are two main types of SMD inductors in smartphones: chip-stacked inductors and NR magnetic rubber inductors. In addition, other types of chip inductors, such as one-piece molded inductors, are installed according to the functional requirements of smartphones.
Plug-in inductors are difficult to exist in smartphones because only SMD inductors can meet the structural requirements of smartphones such as miniaturization, compact installation, and dense arrangement, while plug-in inductors cannot meet these requirements.
What is the role of SMD inductors in smartphones?
The main functions of SMD inductors in smartphones include RF choke, high-frequency filtering, signal amplification, etc.
DC-DC power modules, LNA modules, SAW filter modules, AMP (signal amplifiers), etc. used in smartphones.
According to the characteristics of smartphones:
1. Small size, lightweight, compact structure.
2. High power consumption.
3. Rich wireless functions.
4. Large high-frequency signal processing volume and high fidelity requirements.
NR magnetic glue inductors and ceramic patch multilayer inductors have become the main types of inductors in smartphones.
The role of SMD chip inductors in smartphones
1. The volume is very small, suitable for high-density installation, and meets the requirements of miniaturization of smartphones.
2. NR magnetic rubber inductors are used as power inductors in smartphones to ensure the stable conversion and stable power output of mobile phone DC-DC power supply. NR magnetic rubber inductors can output 30% more power than traditional power inductors at the same volume.
3. Ceramic chip stacked inductors play an important role in the reception, transmission, and filtering of wireless signals in smartphones.
At the same time, they remove noise and amplify signals to ensure the stability of wireless signals.
SMD chip inductors occupy 80% of the inductor market, and the demand will continue to increase. The product features are small and fine, and the power requirements are very high. Therefore, the use of chip power inductors and integrated molded inductors will increase.
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