Switching power supply, also known as switching power supply, is indispensable in our daily life, so what factors should be considered when choosing a switching power supply? Below we share some shopping tips with you.

1. Select the appropriate switching power supply input voltage scale. Taking communication input as an example, the commonly used input voltage specifications are 110V and 220V. Therefore, there are three specifications for 110V, 220V communication switch and general input voltage (AC: 85V-264V). The voltage specification should be selected according to the application area.

2. Select the correct power supply. When the switching power supply works, part of the power is consumed and released in the form of heat. In order to prolong the life of the power supply, it is recommended to choose a model with a 30% increase in the rated output power.

3. Consider the load characteristics. In order to improve the reliability of the system, it is recommended that the switching power supply work under the load of 50%-80%, that is, if the power used is 20W, the output power of the switching power supply should be 25W-40W.

4. If the load is a motor, light bulb or capacitive load, and the current is large at startup, a suitable power supply should be selected to avoid overload. If the load is a motor, consider reverse voltage during shutdown.

5. In addition, it is necessary to consider the working ambient temperature of the power supply, whether there are additional auxiliary cooling devices, and the output of the power supply at ambient temperature must be reduced. Please refer to the derating curve of ambient temperature and output power.

6. Select various functions according to the needs of use: maintenance functions: overvoltage maintenance (OVP), temperature maintenance (OTP), overload maintenance (OLP), etc. Use functions: signal function (normal power supply, power failure)), remote control function, telemetry function, parallel function, etc. Special features: Power Factor Correction (PFC), Uninterruptible Power Supply (UPS).

7. Select the required safety regulations and electromagnetic compatibility (EMC) certification. According to the application, determine the required output voltage and current; the size of the power supply, the device method and the position of the device hole; there are multiple outputs, whether each output needs electrical isolation; the input voltage scale; according to the ambient temperature, determine the switching power supply The reduction, the power of the power supply, is the power of the power supply. Whether certification and safety regulations are required; cooling method of the power supply: natural cooling or forced air cooling; electromagnetic compatibility specifications.

8. Try to use the standard power supply of the switching power supply manufacturer, including standard size and output voltage. In this way, the lead time is relatively fast; on the contrary, the special size and output voltage will prolong the lead time and increase the cost.

9. Choose a well-known brand. As the heart of electronic equipment, switching power supply is crucial to the safe and reliable operation of electronic equipment.

The above 9 points are the factors to be considered when choosing a switching power supply. I hope it can help everyone.