We Provide One-stop Power Supply Solution

Basic Considerations For Choosing High-Quality Switching Power Supplies

Views: 330 Author: Site Editor Publish Time: Origin: Site

It is common knowledge that Switching Power Supplies or Switch-Mode Power supplies (SMPS) compared to linear power supplies are more efficient, precise, and flexible.

Switching Power Supplies

Linear Power Supplies take AC inputs (usually 240VAC or 120VAC) and then use a transformer to step the voltage down.  After this, it rectifies and filters the input into a DC output.

SMPSs rectify and filter AC inputs into DC first, and then converts it back into AC, at a high switching frequency.

Furthermore, it steps the voltage down using a transformer and afterward rectifies and filters it into a DC output.

SMPSs make use of Pulse Width Modulation (PMW) to regulate the times in which transistors switch on or off, hence generating output signals accurately.  

SMPSs are utilized vastly, mostly in a mobile device and computer chargers, telecommunication devices, automotive chargers, medical test equipment, and so on.

Aside from being flexible, SMPSs have efficiency rates that are higher than 90%. 

All these great advantages of SMPSs come at the cost of high-frequency noises from devices such as switching transistors.

To mitigate this, it is important to purchase high quality switching power supplies from the most reliable manufacturers. 

To choose high-quality switching power supplies, follow the guidelines below

1. Research and Purchase from a reliable manufacturer

This is the first and most important point. SMPSs must be purchased from the best manufacturer that offers considerable warranties and thorough support. 

Research reviews on the specific model, brand, configuration, and the quality of the SMPS that is to be purchased.

A hardware technician professional can also be consulted to ensure a high quality buy. 

2. Consider the load characteristics

For capacitive loads, bulbs, or motors, ensure that the appropriate SMPS is selected that will prevent an overload due to the large current at startup.

3. Choose the appropriate power

To ensure that the switching power supply last0, it is recommended to choose one that is 30% higher than the rated output power.

4. Compliance with safety certificates 

Compliance with all the safety certifications that are applicable during purchase and use should be strictly adhered to. 

5. The features of an SMPS should be chosen according to demand

There are two main features which are;

a. Application features: remote control, parallel connection, signal functions (to indicate normal and failure statuses), remote measuring, etc.

b. Protective features: over-temperature protection, overload protection, overvoltage protection, etc. 

6. Working Temperature 

The working temperature of an SMPS should be taken into consideration and inquiries should be made on whether an auxiliary cooler will be needed. 

7. Ensure the selection of the most appropriate output voltage


High-quality switching power supplies are inescapable in most modern designs of electrical appliances. 

This is because they are thermally efficient and power-efficient and can be applied within a vast array of schemes that are available for all applications.

Designing SMPSs requires remarkable attention to detail from placing their components to performing thermal analysis, to carefully testing them for an array of operational conditions.

For this reason, it is best to source high-quality switching power supplies from a professional manufacturer.


Contact Us