About DC-DC Power Supply suppliers

DC allows constant current to flow to the device. Since alternating current is initially provided, the power source must first be converted from alternating current to direct current. Most smaller electronic devices, such as computers, require DC power to work with AC-DC converters from wall power.

AC-DC Conversion Basics
The power supply takes AC power from a wall outlet, converts it to unregulated DC power, and uses an input power transformer to step down the voltage, usually to the voltage required by the load. The transformer also separates the output power from the mains input for safety reasons.

There are two types of AC power sources, unregulated and regulated. Unregulated power supplies are the most basic type of power supply and cannot provide a consistent voltage to the load, while regulated power supplies have and have many different design options.

Linear converters are the simplest, but also generate the most heat, while switching converters are more complex and cooler, but generate more noise. Batteries are usually switching converters. Each has advantages and disadvantages, but which one to use depends largely on the type of application and the conditions under which it is run.