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With the multifunctionality of inductors, the operating voltage of their power circuits has also become diversified. Specifically, taking a typical mobile phone as an example, in addition to the original call function, various functions such as camera, radio, and television have become universal standards. The voltage required for the operation of these functions varies, therefore, the battery voltage must be converted into the voltage required for the normal operation of each circuit through a power conversion circuit. Most of them use switch controllers with high power conversion efficiency (usually referred to as DC-DC converters).

In addition, in the process of multifunctional mobile devices, the requirements for small and thin machines are gradually increasing. To achieve this, it is necessary to reduce the number of components used or make them smaller. This strategy is to increase the switching frequency of DC-DC converters, reduce the necessary rated parameters of power inductors and capacitors, in order to adapt to the miniaturization of components.

There are mainly three items:

Small size, thin thickness

Having the ability to adapt to high power conversion efficiency in power circuits

Has anti noise capability in the working state of the power supply

Stacked power inductors developed for small power circuits

Power inductors and their main performance requirements for small and thin models