Today, we share a case where a filter inductor and a coil inductor are applied to a charging head circuit board. It is highly likely that an ltcc filter and a coil inductor were used on the charging head circuit board.
（the image from Internet）
The main functions of the filter inductor are reflected in the following aspects:
Core Filtering Function of Filter Inductors
Filter inductors can filter out high-frequency noise and clutter in circuits. Relying on their self-inductance electromotive force, they absorb and eliminate high-frequency spike noise and interference signals in circuits, ultimately enabling the output end to obtain a more stable and smooth DC signal.
Key Role of Filter Inductors in High-Frequency Circuits
In high-frequency circuits such as switching power supplies and DC/DC converters, filter inductors play a particularly prominent role. Through their filtering characteristics, they can effectively enhance the anti-interference capability and operational stability of the entire system, meeting the requirement for signal purity in high-frequency scenarios.
Circuit Protection Function of Filter Inductors
Filter inductors also have a circuit protection function. In high-voltage and high-power circuits like switching power supplies, they can absorb and store current energy. When a short circuit or load change occurs at the output end, they suppress abnormalities through reverse current, protecting the safe operation of the power supply and circuit.
