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Multiple-Winding Step-Down Transformers in Electronic ApplicationsToday, electronic devices and equipment generally employ step-down power transformers equipped with a number of secondary windings. Such transformers are used in each and every power supply unit, including switched mode power supplies.As you know, a step-down power transformer has a primary winding for higher voltages.Step-down power transformers are classified by the number of their windings, magnetic core configurations, capacity, magnetic core production technique, and the winding structure.Main transformer components include a magnetic core and a coil with windings.Multiple-winding transformers support multiple output voltages from a single source. This reduces the number of additional transformers required for a certain design.The power of the most powerful output winding is considered to be the rated capacity of a transformer.Multiple-winding step-down transformers offer one specific feature. When an electronic device is energized, a transformer is not overloaded with numerous voltage regulation stages installed on the single secondary winding. Each of available secondary windings is used to power a certain electric circuit equipped with its own voltage regulator and, of course, its own bridge rectifier.Such a design improves the performance of the transformer's primary winding without reducing its load capacity. Besides, it protects galvanic-coupled secondary electric circuits from unwanted parasitic couplings and interference.