Considerations when choosing a switching power supply
(1) Select the appropriate input voltage specification;
(2) Select the appropriate power. In order to prolong the life of the power supply, it is recommended to choose a model with an output power rating of 30% more. For example, if the system needs a 100W power supply, it is recommended to select a model with an output power rating greater than 130W, and so on can effectively improve the life of the power supply.
(3) Consider the load characteristics. If the load is a motor, light bulb or capacitive load, the current is large when the power is turned on, and a suitable power supply should be selected to avoid overload. If the load is a motor, the voltage inversion during shutdown should be considered.
(4) In addition, it is necessary to consider the working ambient temperature of the power supply and whether there are additional auxiliary heat dissipation devices. The power supply needs to derate the output when the ambient temperature is too high. Derating curve of ambient temperature to output power
(5) Select various functions according to the application requirements: Protection functions: Over Voltage Protection (OVP), Over Temperature Protection (OTP), Over Load Protection (OLP), etc. Application functions: signal function (normal power supply, power supply failure), remote control function, telemetry function, parallel function, etc. Special features: power factor correction (PFC), uninterrupted power supply (UPS).
(6) Select the required safety regulations and electromagnetic compatibility (EMC) certification.
