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 a helpful reference in the initial stages of selection.

How to Choose a Switching Power Supply?

Below are six key points for selecting a typical switching power supply.

Select switching power supply functions according to your needs.

Choose protection features such as Overvoltage Protection, Overheat Protection, and Overload Protection. There are also application features like signal functions (indicating normal and fault status), remote control, remote sensing, and capabilities for parallel connection or multiple outputs.

Select the appropriate output voltage.

In addition to selecting the appropriate output voltage for the power supply, the first thing to consider when choosing a switching power supply is identifying the power requirements of the device to be powered. Understanding the power consumption, voltage, and current needed by the load is essential for safe and stable operation of your equipment. Questions to consider include: “Does my equipment operate at a consistent power level?”, “What are the minimum and peak power demands?”, etc.

Select appropriate power capacity.

To ensure longer usage of the switching power supply, it is recommended to choose a model that exceeds 30% of the rated output.

Consider the load characteristics.

For devices such as motors, LEDs, or capacitive loads, choose an appropriate switching power supply to prevent overloads due to inrush current during startup. For motors, it's also necessary to consider reverse voltage flow at shutdown.

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

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

Check compliance with relevant safety and EMC certifications.

The certifications required vary depending on the project.

Selection points will vary depending on the individual project, so please feel free to contact our sales team. We will provide the most suitable proposal for your needs.