What is the difference between the selection method of power inductor and ordinary inductor?

First of all, in addition to the large amount of current we mentioned at the beginning, the power inductor has the characteristics of small size, excellent end strength, high Q value, low impedance and so on. A small body can withstand a large amount of current, which many people did not expect, and the surface is smooth and suitable for mounting; The excellent end strength makes the anti-vibration characteristics good. It can work in the situation of high current, low DC resistance and low magnetic leakage. Because of these characteristics, it can be taped for packaging, convenient for automatic assembly and mass production. After introducing the characteristics of power inductors, we will analyze the differences between power inductors and ordinary inductors from three different perspectives:

1. Structure

Whether it is power inductor or ordinary inductor, the electrode structure needs to be optimized during design to make the internal magnetic field of the product more uniform and improve the magnetic saturation of the product. The size of the power inductor is relatively larger, but the appearance is also more flat.

2. Current

The rated current of the power inductor can be larger than that of the ordinary current, which can reach about 1A at high, while the rated current of the ordinary ferrite inductor is generally lower than tens of mA, even the rated current of the laminated inductor can only reach tens of mA to hundreds of mA.

3. Product application

Power inductor is generally used in DC-DC (power supply module) circuit to stabilize current and store energy. Ordinary ferrite inductors are generally used in microwave and digital circuits to play the role of resonance filtering. Laminated inductors are widely used to process digital signals and act as signal isolation. Each circuit has different division of labor, and the power inductor with large current can take more responsibilities than the ordinary inductor on the computer host, microcontroller and graphics card, which work for a long time.

Selection method of power inductor

The most important three points to consider when selecting inductors for portable power applications are size, size, and size. Here is a brief summary of the considerations for the selection of power inductor. I hope it will help you in the selection:

1. Jump out of the misunderstanding of the type of power inductor and understand the role of power inductor;

2. Define the specific functional requirements of the circuit board for the power inductor and the space requirements of the circuit board;

3. If the circuit board has not been determined, the technical involvement of the inductor manufacturer can be considered;