1、Matters needing attention when choosing a switching power supply

1)Select the appropriate input voltage specification;

2) Select the appropriate power. To increase the lifespan of the power supply, a model with an output power rating 30% higher can be selected.

3) Consider the load characteristics. If the load is a motor, a bulb or a capacitive load, the current is relatively large at the moment of startup. A suitable power supply should be selected to avoid overload. When the load is a motor, voltage backflow during shutdown should be considered.

4) In addition, the operating environment temperature of the power supply and whether there are any additional auxiliary heat dissipation devices should also be taken into consideration. When the ambient temperature is too high, the power supply needs to be derated. The derating curve of the ambient temperature on the output power.

5) Select various functions as required by the application:

Protection functions: Overvoltage protection (OVP), over-temperature protection (OTP), overload protection (OLP), etc.

Application functions: Signal function (normal power supply, power supply failure), remote control function, remote measurement function, parallel connection function, etc.

Special functions: Power Factor Correction (PFC), Uninterruptible Power Supply (UPS)

6) Select the safety regulations and electromagnetic compatibility (EMC) certifications that need to be met.

2. Precautions for using switching power supplies

Before using the power supply, first determine whether the input and output voltage specifications are consistent with the nominal values of the power supply being used.

2) Before powering on, check whether the input and output leads are connected correctly to avoid damaging the user's equipment.

3) Check if the installation is firm, whether the installation screws come into contact with the power board components, and measure the insulation resistance between the housing and the input and output to avoid electric shock.

4) To ensure the safety of use and reduce interference, please make sure that the grounding terminal is reliably grounded.

5) Multi-output power supplies are generally divided into main and auxiliary outputs. The characteristics of the main output are superior to those of the auxiliary output. Generally, the main output has a larger output current. To ensure indicators such as the output load regulation rate and output dynamics, it is generally required that each channel carry at least 10% of the load. If the auxiliary road is used instead of the main road, an appropriate dummy load must be added to the main road. Please refer to the specification sheet of the corresponding model for details.

6) Please note: Frequent switching on and off of the power supply will affect its lifespan.

7) The working environment and the degree of load load will also affect its lifespan.