Direct current power supplies (DC power supplies) distribute electricity that flows in only one direction (as opposed to alternative current, which flows in both directions) and has either a positive or negative charge. Most commonly, direct current electricity is found in all types of batteries, as this power is easy to store and conserve.
Uses of DC Power
The easiest way to find something running on DC power supplies is to look for the batteries. From 9-volts to car batteries, every battery uses a direct current for its electricity. Most commonly, direct current is used in small electronic devices and appliances. It is easier to store and poses less of a danger risk than high voltage alternating currents that comes from wall outlets, making it ideal for these items. Since outlets do supply AC electricity, a converter is needed to make it compatible with DC power supplies.
Converting DC Power
DC-DC power converters are used to take electricity from a type of DC power supplies and output it to a device or other electrical connection at a different voltage. When choosing a DC-DC power converter, it is important to note the difference between isolated and non-isolated converters. Non-isolated converters have a direct path from their input and output and the nature of the electrical charge is not changed by the converter. These are the most inexpensive and simple type of converter and are widely used for a number of applications. Visit for more information.
Isolated DC-DC Converters
Isolated converters, on the other hand, use a built-in transformer as a barrier between their input and output. While these converters are more complex and expensive to produce, they allow for improved safety because of the flow restricting barrier created by the internal transformer, higher voltage loads to be converted and for the charge (positive or negative) of the load to be switched.
All types of DC power supplies and DC power converters are available from CyPower’s extensive online electrical supply catalog. CyPower is an authorized dealer of every product they carry, so every part is guaranteed high quality and authentic. Go to to see their selection and learn more.
