How to Choose a Switching Power Supply

This page provides a concise summary of how to choose a basic switching power supply. We hope it will serve as useful foundational knowledge in the early stages of selection.

How to Choose a Switching Power Supply?

Below are six key points summarizing how to choose a general switching power supply.

Select the functions of the switching power supply according to your needs.

Choose protection functions such as overvoltage protection, overheat protection, and overload protection. There are also application functions such as signal functions (indication of normal and fault status), remote control, remote sensing, and parallel connection or other output functions.

Select the appropriate output voltage.

In addition to selecting the proper output voltage of the power supply, the first thing to consider when choosing a switching power supply is to determine the power requirements of the device to be installed. Correctly understanding the power consumption, voltage, and current required by the load is essential for the operation and safety of your equipment. Key questions include whether your device operates at a constant power level and what the minimum and peak power demands are.

Select the appropriate power rating.

To ensure a longer service life for the switching power supply, it is recommended to choose a unit with at least 30% more than the rated output capacity required.

Consider the load characteristics.

For motors, LEDs, capacitive loads, and similar devices, select an appropriate switching power supply to prevent overload caused by inrush current at startup. For motors, it is also necessary to consider reverse voltage during shutdown.

Consider the operating temperature of the switching power supply and whether additional cooling is required.

The output of a switching power supply decreases in high-temperature environments. If air cooling is required, it is necessary to select an appropriate fan.

Confirm compliance with applicable safety and EMC certifications.

The required certifications vary depending on the project.

Selection points vary depending on your specific project. Please feel free to contact our sales team for assistance. We will be happy to propose the most suitable solution for your needs.