1. Choose the appropriate input voltage range.Take AC input as an example, the commonly used input voltage specifications are 110V, 220V, so there are corresponding 110V, 220V AC switching, as well as the general input voltage (AC: 85V-264V) three specifications.The input voltage specification should be selected according to the area of use.
2. Choose the right power.Switching power supply consumes part of the power when it is working, and it is released in the form of heat.In order to increase the life of the power supply, it is recommended to choose a machine with an output power rating of 30% more.
3. Consider load characteristics.In order to improve the reliability of the system, it is recommended that the switching power supply work at 50%-80% load is the best, that is, assuming the power used is 20W, the switching power supply with the output power of 25W-40W should be selected.
If the load is motor, bulb or capacitive load, when the current is large at the moment of startup, the appropriate power supply should be selected to avoid overload.If the load is the motor should be considered when the shutdown voltage backfill.
4.In addition, it is necessary to consider the working environment temperature of the power supply and whether there is additional auxiliary cooling equipment. The output of the circular temperature power supply at a high temperature of A should be reduced.Reference should be made to the reduction curve of ring temperature on output power.
Post time: Oct-15-2022