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What are the differences between the applications of switching power supplies and linear power supplies?

Article Source：Kinri Energy | Author：Kinri Energy | Issuing Time：2024.05.31
In the electronic world, switching power supplies and linear power supplies are two very important roles. Although both are power supplies, they have many significant differences.Let's talk about efficiency first. Switching power supplies are like highly efficient little experts, with an efficiency of over 80%, while linear power supplies are slightly inferior in this regard, usually only around 50%. This can directly affect the efficiency of energy utilization!


120W Din Rail Switching Power Supply

In terms of volume and weight, switch mode power supplies have the advantage of high-frequency operation, with small transformers and other components, making them lightweight and portable overall; Linear power sources, on the other hand, appear somewhat cumbersome due to their larger transformers.

In terms of heat dissipation, switch mode power supplies generate less heat and have relatively low requirements for heat dissipation; Linear power supplies, on the other hand, require more careful heat dissipation due to their high losses and heat generation.

Speaking of output stability, linear power sources have excellent performance in output ripple and excellent voltage stability; However, switch mode power supplies are not inferior and can also meet most application needs through reasonable design.

In terms of electromagnetic interference, the electromagnetic interference of switch mode power supplies is relatively large, and filtering measures need to be taken to cope with it; Linear power sources are much quieter in this regard.

In the application field, linear power supplies are more suitable for scenarios with extremely high ripple requirements and low power, such as high-precision measuring instruments and professional audio equipment; Switching power supplies are widely active in various electronic devices, especially in high-power and weight demanding areas, such as our daily use of mobile phone chargers, computer power supplies, etc.

In short, switching power supplies and linear power supplies each have their own characteristics, and they both have an irreplaceable position in the electronic field, adding color to our technological life together!
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