High-frequency transformers are widely used in the modern industry, especially in recent years, high-frequency transformer has developed rapidly. What direction is it going to develop? At present, it is recognized that the high frequency transformer is developing in the direction of high frequency. So what is high frequency? How many frequencies should high frequencies be achieved? And what specific areas can high frequency transformers be applied to? Let's take the example of PEE64 high frequency transformer, and below are our specific analysis.

I. High frequency electronic transformer has two main concepts:

（I）One is "electronics", which is different from power transformer and RF signal transformer. According to the field of switching power converter I am engaged in, "electronics" here should refer to "power electronics".

（II）The second is "high frequency". Traditionally, high frequency is above 20kHz, but at present, the understanding of high frequency in different fields may be different. For low power (tens to hundreds of watts) converters, several hundred kilohertz ago, it was considered to be high frequency, high power (hundreds to thousands of watts), tens of thousands of kilohertz calculation of high frequency, high power frequency conversion, tens of kilohertz is high frequency. However, in any case, the high frequency electronic transformer should refer to "the power transformer of switched power conversion circuit with frequency range from tens of kHz to several megahertz, whose working frequency range is less than frequency and radio frequency. It is used for switched power converter, different power and radio transformer, and it is the signal of energy transfer.

II. High frequency electronic transformers are developing in the direction of high frequency, means high power density and low plane.

（I）Market develop needs high power density, and high frequency is the most effective way to improve power density. With the development of high frequency magnetic materials, the situation of high frequency transformers has also been created. At high frequency, the key to improve the power density of transformer is the design technology of transformer. Because of the importance of high frequency and eddy current loss, traditional design methods can not meet the requirements of high frequency, so the core and winding of design become more and more important.

（II）The requirement of low plane transformer makes PCB coil widely used, but the design of transformer brings new difficulties, especially the air gap of transformer, such as sweep transformer, harmonic transformer and power factor correction inductor(PEC inductor).

III. High frequency transformers mainly used in the field of high-frequency power conversion.

Generally speaking, electronic transformers are oriented towards high frequency, planar, integrated, modular fast, array, hybrid direction and the following new analysis methods, such as electromagnetic field analysis method and design of new technology, such as optimization design, multi-domain integrated design, and the challenge of new manufacturing technology to traditional technology. Due to the development of frequency and magnetic materials, many semiconductor processing technologies can be applied in the manufacture of high frequency transformers, or transformers are discrete devices, which can be integrated with power converters through thick and thin film technology as a whole. In the case of low power, this trend has been very obvious.

We specialize in the customization and production of various planar transformer cores and bobbins, we can meet the various design needs of customers, if you have interest, welcome to contact me, we can exchange more details.