C25 Power Supplies - Board Mount

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DC DC Converters

DC-DC converters are electronic devices used to convert electrical power from one circuits to another, usually from one voltage level to another. A DC-DC converter typically takes the input DC from one source and converts it to a different voltage level using a variety of techniques such as stepping up, stepping down, and inverting. The output from a DC-DC converter can be either AC or DC voltage, depending on the application.

A DC-DC converter is an essential part of any modern electrical system. They are used to provide power to all devices connected in the system, from the main power source down to the individual components, that require different voltage levels from the main power source. Since some devices, such as motors and large capacitors, can only accept direct current, a DC-DC converter is used to convert rectified AC to DC. DC-DC converters are also used to step up voltage levels, in order to lower the current draw and reduce the power losses. Other applications of DC-DC converters include power conversion in personal electronics, motor control, and solar power systems.

The most popular topologies for DC-DC converters are buck converters, boost converters, buck-boost converters, and cuk converters.

A buck converter is used to step down the input voltage, and is the simplest topology among all the other types of DC-DC converters. A buck converter operates by controlling a switch, usually an FET, which conducts when the voltage is higher than the output voltage and disconnects when the voltage is lower. The power conversion efficiency of a buck converter is typically around 90%.

A boost converter, also known as a step-up converter, is used to step up the input voltage and is commonly used to increase the battery voltage in applications such as smartphones and laptop computers. The switching element in a boost converter is the same as in a buck converter, but instead of turning off at low voltage, the switch turns off at high voltage. The power conversion efficiency of a boost converter is typically around 98%.

A buck-boost converter combines the advantages of a buck and a boost converter, and is used to change a voltage level either up or down. This type of converter can be used in applications such as power supplies where the input voltage can vary greatly. The power conversion efficiency of a buck-boost converter is typically around 97%.

The cuk converter is a modified version of the boost converter. It utilizes two capacitors to store energy and thus can achieve higher efficiency compared to the other types of converters. The power conversion efficiency of a cuk converter is typically around 99%.

DC-DC converters are used in a wide range of applications, from large scale power systems to small electronic devices. In addition to the popular topologies discussed above, there are many other specialized types of DC-DC converters that are used in specific applications. Such converters include flyback converters, forward converters, push-pull converters, sepic converters, and totem-pole converters.

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