FAQ

The operating frequency of any magnetic component is a key parameter. This helps the designer determine what possible core materials can be used on the design. It also helps determine the size of both the core and wire as well.

Typically, specific type transformers, aka “switchers” not only operate in a frequency range, but also are used in a specific circuit topology. Operating mode describes how the transformer is used in the circuit; modes like flyback, forward converter, and bridge mode help define how to design the transformer. Specifying the operating mode is imperative, especially for switch mode type transformers.

Giving the input voltage details along with the output voltage helps the designer determine the turns-ratio that is needed for a given transformer. With this information, the designer can determine whether the secondary voltage needs to be stepped-down or stepped-up.

Often times a transformer or inductor is to be safety certified by a third party testing house. These safety consulting and certification type companies have standards and directives that key electrical components, such as transformers must meet. If the product to be designed is going to be in a power supply that is going to carry a UL or CE mark, it is best to know that up front. That way it can be determined what, if any, standards apply and how those translate to the insulation techniques and creepage requirements needed to meet those standards. Often times these requirements have significant impacts on shape and size of the magnetic component.