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The difference between switch mode power supply and power supply unit

Article Source：Kinri Energy | Author：Kinri Energy | Issuing Time：2024.05.18
Switch mode power supplies and power supply units are a concept in the minds of many people, but they are actually different. Below is a detailed introduction to their differences:


600W Switching Power Supply

1. Different working principles

A switching power supply is an electrical appliance that converts high voltage into low voltage, and the most important part of it is the switching power supply chip. The switching power supply chip is the core component of the power converter, which can achieve power conversion by continuously switching the state of the switching transistor. A power supply unit, also known as an adapter, is a device that converts alternating current into direct current, providing power to electronic devices.

2. Different application scenarios

The application scenarios of switch mode power supplies and power supply units are also different. Power supply unit is suitable for some low-power appliances, such as mobile phone chargers, laptop adapters, etc. These devices require AC power to be connected and converted into DC power for use by the power supply. switch mode power supplies are suitable for some high-power devices, such as computers, LED lights, and frequency converters. These devices not only require stable voltage, but also require high current support.

3. Different quality requirements

There are also differences in quality requirements between switch mode power supplies and power supply units. Power supply units mainly require stable output voltage, safety performance, and penetration ability to meet usage requirements. Therefore, the quality requirements of power supply units are relatively low. switch mode power supplies, on the other hand, require higher stability, reliability, and anti-interference ability, and their quality requirements are relatively high.

Conclusion

Although there are similarities in the names of switch mode power supplies and power supply units, there are significant differences in their working principles, application scenarios, quality requirements, and other aspects. When choosing, it is necessary to make choices based on actual needs, and pay attention to quality selection when making purchases. Do not blindly pursue low prices to avoid unnecessary losses.
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