Brief Introduction To The Development Trend Of Power Inductors

Development trend of power inductors:

1, fine power inductors

In the design of power supply of portable electronic products, the biggest challenge is to improve the power supply efficiency but also reduce its size, that is to say, it is best to use the minimal design of inductor in power supply design.

The lower inductance values caused by the load fluctuation caused by the transient response are offset by better. In this case, the load fluctuation is accompanied by a faster transient response, and the low inductance value is shifted due to the high frequency.

However, there is a need to lose, improve the switching frequency, but also increase the switching loss, which will also lead to a reduction in the efficiency of the work. Due to the interaction between the other important circuit design will affect the performance of the device, so it is not easy to simply increase the switching frequency.

However, the further refinement of the internal circuit makes the switching frequency as high as 3MHz, but at the same time the inductance value is lower than the 2.0H. It is estimated that the switching frequency of 6 ~ 8MHz and the inductance value of less than 1H are not common, which leads to the dramatic miniaturization of the inductor.

2, higher switching frequency

The development trend of 1- grade a inductor is small package, low inductance and faster switching frequency. For example with 300kHz switching frequency but the area is only 16 or 36mm2 of the inductor will be widely used. The use of a 9mm2 sized inductor can increase the switching frequency to 1.5MHz, which indicates that the switching frequency is increased at the same time as the size of the switching frequency is reduced accordingly. The key to providing a finer inductor in the future lies in the ability to reduce the inductance and improve the switching frequency by continuous improvement in circuit design, materials and manufacturing.

Advances in the technology of cell phones for mobile phones have emerged in the thickness of the packaging, for example, from 2mm to 1mm. The significant improvement in the technology allows for the miniaturization of the device to support the device miniaturization trend continues to attract the global consumer market of electronic products. Even so, it's not a perfect solution to simply use a small inductor.

3, winding improvement

Smaller portable devices require a more compact and efficient DC/DC converter, which can maximize the battery power by the powerful functions of these additional devices. Despite the large components that are difficult to reduce the size of the inductor and maintain a low impedance, manufacturers are still in better design, improve materials science, improve manufacturing technology to reduce the size of the inductor.