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How to choose a switching power supply As the heart of electronic equipment, switching power supply plays a vital role in the safe and reliable operation of electronic equipment. The switching power supply consumes a part of the power when it is working, and is released in the form of heat. The problems to be considered when selecting the switching power supply are:

1. In order to improve the reliability of the system, it is recommended that the switching power supply work at 50%-80% load, that is, assuming that the power used is 20W, a switching power supply with an output power of 25W-40W should be selected.

2. Try to use the manufacturer's standard power supply, including standard size and output voltage. This will result in faster delivery; on the contrary, special size and output voltage will increase development time and cost.

3. Clear the input voltage range. Take the AC input as an example. The commonly used input voltage specifications are 110V and 220V, so there are 110V, 220V AC switching and universal input voltage (AC: 85V-264V). The input voltage specification should be selected according to the region of use.

4. The switching power supply consumes a part of the power during operation and is released in the form of heat. Therefore, the user should consider the heat dissipation problem of the switching power supply in the system design (especially the closed system).

5, according to the use of the situation, determine the required output voltage, current; power supply size, installation and installation hole position; there are several outputs, each output needs electrical isolation; input voltage range; according to the ambient temperature, determine the switching power supply Degree of derating, power supply; whether certification and safety standards are required; cooling method of power supply: natural cooling or forced air cooling; electromagnetic compatibility standard.

How to choose a switching power supply  

As the heart of electronic equipment, switching power supply plays a vital role in the safe and reliable operation of electronic equipment

How to choose a switching power supply  

As the heart of electronic equipment, switching power supply plays a vital role in the safe and reliable operation of electronic equipment

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