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Precautions for selecting and using switching power supplies

Article Source：Kinri Energy | Author：Kinri Energy | Issuing Time：2024.04.23
Switching power supplies occupy an important position in modern electronic devices, and there are many aspects that need attention on how to choose and use them. This article introduces how to choose a switching power supply and the issues that need to be noted when using a switching power supply.



Issues to pay attention to when choosing a switching power supply

●  The input voltage specifications must match the equipment requirements: ensure that the power supply matches the voltage requirements of the equipment to avoid equipment malfunction or damage.

●  We should choose models that match and exceed 30% of the rated output power to extend the service life of the power supply: choosing a slightly higher power supply can provide a longer service life and can cope with some high load situations.

●  The load characteristics need to be carefully considered. For motors, light bulbs, or capacitive loads with high current at startup, suitable power sources should be selected to prevent overload. The motor also needs to consider the issue of voltage backflow during shutdown: different loads have different characteristics, and a suitable power source should be selected according to the actual situation to prevent overload and other problems.

●  The temperature of the working environment and the availability of additional auxiliary cooling equipment also need to be considered. When the ambient temperature is too high, the power supply needs to reduce its output limit, and attention should be paid to the impact of ambient temperature on output power: high temperature can affect the performance of the power supply, and heat dissipation measures and the impact of temperature on output power need to be considered.

●  Select various functions based on application requirements, such as protection functions (including overvoltage protection, over temperature protection, overload protection, etc.), application functions (such as signal function, remote control function, telemetry function, parallel function, etc.), and special functions (such as power factor correction, continuous power supply, etc.). Suitable functions should be selected based on specific application requirements to meet the requirements of the system.

●  Compliance with the required safety regulations and electromagnetic compatibility (EMC) certification is a necessary condition: ensuring that the power supply complies with relevant safety regulations and electromagnetic compatibility standards to ensure safety and stability.

Precautions for using switching power supplies

●  Before using the power supply, it is important to ensure that the input and output voltage specifications are consistent with the nominal value of the power supply used: to avoid voltage mismatch that may cause equipment damage or malfunction.

●  Before powering on, it is necessary to carefully check the connection of the input and output leads to prevent damage to the user's equipment: ensure that the connection is correct to avoid damage to the equipment.

●  Check if the installation is stable, pay attention to the contact between the installation screws and the power board components, measure the insulation resistance of the casing and input/output to prevent electric shock accidents: ensure that the installation is firm and the insulation is good to prevent electric shock accidents.

●  To ensure safe use and reduce interference, it is essential to ensure that the grounding terminal can be reliably grounded: good grounding can improve safety and reduce interference.

●  A power supply with multiple outputs is usually divided into main and auxiliary outputs, with the main output having better characteristics. Generally, the main output is the one with a larger output current. To ensure the output load adjustment rate and output dynamics, each circuit should have at least 10% load. If auxiliary roads are used instead of the main road, appropriate false loads should be added to the main road: load distribution should be reasonable to ensure the performance indicators of the power supply.

●  Attention should be paid to the impact of frequent power on its lifespan: frequent switching can shorten the lifespan of the power supply.

●  The working environment and load level can also have an impact on the lifespan of the power supply: harsh working environments and high loads can affect the lifespan of the power supply.

In summary, the correct selection and use of switching power supplies are crucial for the stable operation of electronic devices. I hope everyone can pay attention to these precautions to ensure the performance and lifespan of the power supply.
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