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The difference and characteristics between switch mode power supplies and power adapters

Article Source：Kinri Energy | Author：Kinri Energy | Issuing Time：2024.03.28
In electronic devices, the role of power supply is crucial, as it is responsible for providing and regulating the required voltage and current. Among numerous power supply types, switch mode power supplies and power adapters are two common power supply solutions. Although they all perform similar tasks, there are some key differences between them.



1. Working principle

Switching power supplies and adapters have different operating principles. A switching power supply is a type of DC power supply that controls the flow of current through a switch. When the switch is in the open state, current will flow through the circuit; When the switch is in the off state, the current will stop flowing. The advantage of this method is high efficiency, as electricity is only consumed when needed.

An adapter is an AC power supply that meets the needs of a device by changing the voltage and current of the AC power. It contains a transformer inside that can convert the input voltage and current into the desired output value.

2. Volume and weight

Due to the fact that the circuit design of switch mode power supplies is usually simpler than that of adapters. This makes switch mode power supplies advantageous in terms of portability and installation space.

3. Energy efficiency

Due to the high efficiency of switch mode power supplies, their energy consumption is lower in long-term use. Although adapters can also provide the required voltage and current, their internal components such as transformers may result in certain energy losses.

4. Output stability

In terms of output stability, adapters are usually more stable than switch mode power supplies. This is because the output of the adapter is converted through a transformer, and the characteristics of the transformer enable it to provide a more stable output. However, this does not mean that the output of the switching power supply is unstable, but in some specific applications, such as high-precision instruments or sensitive devices, adapters may be more suitable.

In summary, both switch mode power supplies and adapters have their own advantages and usage scenarios. Switching power supplies are widely used in many situations due to their high efficiency, stability, and other advantages; Adapters, on the other hand, perform well in certain specific scenarios due to their output stability, wide range adaptability to input voltage and current, and better adaptability to high-precision devices. When choosing between using a switch mode power supply or an adapter, it is necessary to weigh the actual application requirements and equipment requirements.
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