Note when selecting switching power supply
1) selection of appropriate input voltage specifications;
2) choose the right power. In order to make the life of the power supply growth, can choose more than 30% models rated output power.
3) considering load characteristics. If the load is a motor, light bulb or capacitive load, when the power is switched on, the power should be used to avoid overload. If the load is the motor should be considered when stopping voltage intrusion.
4) in addition to the need to consider the working environment temperature of the power supply, and there is no additional auxiliary cooling equipment, the high temperature power supply required to reduce the amount of output. The curve of the reduction of the output power by the loop temperature.
5) according to the application needs to choose the various functions:
Protection function: over voltage protection (OVP), over temperature protection (OTP), over load protection (OLP), etc..
Application function: signal function (normal power supply, power supply failure), remote control function, telemetry function, parallel function, etc..
Special features: power factor correction (PFC), no power off (UPS)
6) to select the required compliance and electromagnetic compatibility (EMC) certification.
Note on the use of switching power supply
1) before using the power supply, first determine the input and output voltage specifications and the nominal value of the power supply is in line with the;
2) before power on, check the input and output of the lead is connected properly, so as not to damage the user equipment;
3) check the installation is firm, the installation of screws and power plate device has no contact, measurement of the shell and the input, the output of the insulation resistance, so as to avoid electric shock;
4) to ensure the use of safety and reduce interference, please ensure that the grounding terminal reliable grounding;
5) the output of the power supply is generally divided into main and auxiliary output, the main output characteristic is superior to the auxiliary output, and the output current is large. In order to ensure the output load regulation rate and output dynamic and other indicators, the general requirements of each road with at least 10% of the load. If you use the auxiliary road without the main road, the main road will certainly add the appropriate false load. See the specific specification of the corresponding model;
6) please note: the power switch will affect the life of the power switch;
7) the working environment and the load level will also affect its life.