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Why are switching power supplies becoming increasingly expensive nowadays?

Article Source：Kinri Energy | Author：Kinri Energy | Issuing Time：2024.03.27
In the field of electronic products, we often hear the term switch mode power supply, especially in today's increasing demand for high efficiency and miniaturization. However, it is accompanied by an obvious feature - high prices. This has also sparked intense discussions on the market, whether the high performance of switching power supplies deserves such a high price? Next, let's take a look at the reasons why switching power supplies are worth a high price.



High efficiency and low power consumption

Switching power supplies typically have higher conversion efficiency and can more effectively convert input electrical energy into output electrical energy., And the built-in PFC function helps to improve the power factor of the system, reduce the impact of harmonics on the power grid, and improve energy utilization efficiency. So under the same power output, switch mode power supplies generate less heat, lower power consumption, lower energy costs, but also increase manufacturing costs.

Miniaturization and lightweight design

Compared to linear power supplies, switch mode power supplies are more flexible in design and can achieve smaller and lighter sizes. This is a crucial advantage for some application scenarios, such as mobile devices or electronic products in compact spaces, such as mobile phone chargers, portable power banks, blood glucose meters, Bluetooth earphone charging cases, and so on. But manufacturers also need to have more complex designs and manufacturing processes. So the cost has increased again.

Wide input voltage range

Switching power supplies have a wider range of input voltages, adapting to voltage changes in different regions and usage environments. For example, many people often cross different countries and regions, which may have different voltage standards. To address this issue, some switch mode power supply technologies have been applied to international travel chargers. These chargers typically have adaptive voltage inputs that can adapt to different voltage standards globally, such as 110V and 220V. This allows users to use the same charger no matter where they are, without worrying about voltage compatibility issues. Of course, this improvement in adaptability will also increase costs, as it requires more complex circuits and protection mechanisms.

High frequency operation

Switching power supplies operate at high frequencies for more precise control of energy conversion. For example, in LED lighting systems, LEDs require a DC power supply to provide constant brightness, while a switching power supply can convert the input AC power supply into the desired DC power supply through high-frequency operation. This helps to improve stability and response speed, but also requires higher quality components and more advanced circuit designs, which further increases manufacturing costs.

Advanced protection functions

To ensure stable operation of the power supply, switch mode power supplies are usually equipped with various protection mechanisms, such as overcurrent, overvoltage, over temperature, overload, etc. When the current exceeds the rated range, the voltage exceeds the set threshold, the production environment temperature is too high, external short circuits, and the load is too large, these functions can ensure that the switching power supply can stop output in a timely manner in the face of abnormal situations, protect the safe operation of equipment and the power supply itself. They not only improve the reliability of the product, but also increase the technical difficulty and cost of design and manufacturing.

Although switch mode power supplies are expensive, their outstanding advantages in performance and design make them highly favored in many fields. With the continuous evolution of technology, we may expect a better balance between performance and cost in future switch mode power supplies. Manufacturers may adopt more economical and environmentally friendly production processes to provide consumers with more competitive choices.
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