1. It is very important to select the appropriate input voltage standard first.
2. Choose the right power. In order to prolong the service life of the power supply, the model with 30% increase in output power rating should be selected.
3. Consider the load characteristics. The added load is a motor, bulb or capacitive load. The current is very high when starting. Proper power supply must be selected to prevent overload. If the load is a motor, consider the reverse voltage during shutdown.
4. For other requirements, please consider the temperature of the working environment of the power supply and whether there is a rated auxiliary cooling device. If the ambient temperature is too high, the output power needs to be reduced. Derating curve of ambient temperature to output power.
5. Select various functions according to the needs of use:
Switching power supply protection function: over voltage protection (OVP), over temperature protection (OTP), overload protection (OLP), etc.
Functions: signal function (normal power supply, power off), remote control function, telemetry function, parallel function, etc.
Special functions: power factor correction (PFC), uninterruptible power supply (UPS)
6. Select the required switching power supply safety regulations and electromagnetic compatibility (EMC) certification.
