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Do you know the precautions for choosing a switching power supply?

Article Source：Kinri Energy | Author：Kinri Energy | Issuing Time：2024.03.27
When choosing a power supply, a key consideration is how to improve its lifespan and ensure system stability. This article will introduce some practical suggestions for choosing a power supply to better meet the power requirements of the system and extend the lifespan of the power supply.



Rated power:

To increase the lifespan of the power supply, it is recommended to choose a model with an additional 30% rated output power. For example, if the system requires a 100W power supply, it is recommended to choose a model with a rated output power greater than 130W. The power supply may be challenged by various factors in practical applications, such as environmental temperature fluctuations, power grid interference, etc. The additional power reserve is more like a "insurance" of the system, which can ensure that the system can still operate stably under complex working conditions.

Working environment:

In addition, it is necessary to consider the working environment temperature of the switching power supply, as well as the presence of additional auxiliary cooling equipment. In case of excessively high ambient temperature, the power supply needs to be reduced in output. This mechanism of reducing output helps to maintain the long-term stable operation of the power supply. Although reducing the rated output at excessively high ambient temperatures may affect the output capability of the power supply, this is also to better protect the power supply, extend its lifespan, and ensure system reliability.

Select various functions according to the application requirements:

●  Protection functions: Overvoltage protection (OVP), Over temperature protection (OTP), Over load protection (OLP), etc.
●  Application functions: Signal function (POWER GOOD, POWER FAIL), remote control function, telemetry function, parallel function, etc.
●  Special functions: Power Factor Correction (PFC), Non Power Failure (UPS).

Safety certification:

Reasonable power reserve, consideration of environmental temperature, and selection of appropriate functions are key to ensuring system stability and power supply lifespan when selecting power sources. In addition, it is necessary to ensure that the power supply complies with corresponding safety regulations and EMC certification standards to improve the overall reliability of the system. By carefully selecting and using power sources reasonably, it is possible to better meet system requirements, extend power supply life, and ensure reliable operation of the system.
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