Loopformers

Loopformers are a type of magnetic component used in electronics, particularly in power conversion applications. They are essentially inductors, but with a specific construction designed for high-frequency operation and efficient energy storage. The core of a loopformer is typically made of a high-permeability ferrite material, often shaped in a toroidal or sometimes a rectangular configuration. The windings are carefully placed around this core. The term "loopformer" itself often refers to the specific way the windings are arranged, creating a closed magnetic loop within the component. This design helps to minimize magnetic flux leakage, which is crucial for achieving high efficiency and reducing electromagnetic interference (EMI) in switching power supplies. Loopformers are commonly employed as energy storage elements in DC-DC converters, such as buck converters and boost converters, where they store energy during one part of the switching cycle and release it during another. Their ability to handle high switching frequencies and maintain good performance makes them a popular choice for miniaturization and improving the power density of electronic devices. The exact specifications of a loopformer, including inductance, current rating, and operating frequency, are determined by the design requirements of the specific circuit it is intended for.