A switching power supply, or a switched-mode power supply, is a highly efficient type of AC/DC power supply. Unlike linear power supplies, which maintain a constant output voltage by dissipating excess energy as heat, switching power supplies utilize a switching regulator. This regulator switches the input voltage on and off at a high frequency to counteract fluctuation in the mains. There are various types of switching regulators, with pulse width modulation being the most common.

The order of components in a switched-mode power supply also differs from that of a linear power supply, with the current first entering a rectifying and filtering circuit, being sent to the regulator and transformer, and then being rectified and filtered once more. Read more about switching power supplies here.

Your power supply must be rated for the input voltage of the main power line. The most common input voltages are 120 VAC for residential use and 240 VAC for commercial use.

The output voltage of your power supply must meet the requirements of your LED fixture or electronic device. DiodeDrive carries power supplies with output voltages spanning from 5 VDC to 48 VDC.

If you plan to use your AC/DC power supply with dimmable LED lights, you must also have a dimmable power supply unit. Make sure to choose a power supply that supports the dimming type of your light and any existing switches. DiodeDrive carries power supplies that are compatible with the following dimming types: 0-10V, PWM, TRIAC, and Potentiometer dimming.

The power consumption of a power supply, or wattage, indicates the maximum power it can deliver. For optimal performance, select a power supply that supplies at least 20% more power than your application's requirements. This will help ensure proper functionality and extend the power supply's lifespan.

Select a waterproof or weatherproof power supply for electronic equipment and lighting systems in outdoor and wet environments. Water-resistant power supplies ensure that all parts of your electrical system remain protected against water intrusion.

Two common types of AC/DC power supplies are those made specifically for desktops and other wall-plugged devices. These power supplies require no rewiring and come ready to use with standard barrel-type connectors.

DiodeDrive carries AC/DC power supplies suited for a variety of applications. Our enclosed power supplies with a built-in junction box provide a clean, professional-looking option that eliminates exposed wires. Metal power supplies are suitable for various indoor or outdoor applications and provide increased durability. Plastic AC/DC power supplies are a great economical choice for safely converting and supplying power.

Our selection of AC/DC power supplies meets the requirements for a wide range of standards and certifications to protect against short circuits, overload, and overvoltage. Power supplies that are UL Recognized, UL Listed, and ETL Listed are certified for safety and installation requirements.

Our Class 2 power supplies meet all wiring and power limitations required by the NFPA 70 National Electric Code to prevent potential fire hazards. Class II power supplies are protected against electrical shock and have sufficient insulation layers. Products with a CE label meet environmental, health, and safety standards set by European legislation. Finally, our FCC power supplies are certified to not cause interference with other electronic devices.