Molded Power Inductors, also known as integrated power inductors or molded inductors, are a modern inductor design made by encapsulating the coil and magnetic core material together in a sturdy housing. This design provides better mechanical strength, higher current carrying capacity, and better electromagnetic shielding effect. Integrated inductors are commonly used in high-performance electronic devices, especially in applications such as power management and DC-DC converters.

characteristic:

High current carrying capacity: The integrated inductor is designed to handle high currents and maintain a certain inductance value even in a saturated state.

Low DC Resistance (DCR): In order to minimize power loss, integrated inductors typically have lower DC resistance.

Excellent thermal performance: Due to the use of special packaging materials and design, the integrated inductor can withstand high temperature rise, ensuring reliability for long-term operation.

Good electromagnetic shielding: The integrated design helps to reduce electromagnetic interference (EMI) and improve the electromagnetic compatibility (EMC) of equipment.

Compact size: Integrated inductors typically have smaller external dimensions and are suitable for applications with limited space.

High frequency stability: In applications such as switching power supplies, integrated inductors can maintain stable inductance values at high frequencies.

Application:

Power conversion: In a DC-DC converter, an integrated inductor is used to store and transfer energy, achieving voltage rise and fall conversion.

Filtering: In the power supply circuit, an integrated inductor is used to filter out high-frequency noise and ripple, providing stable voltage output.

Energy storage: In some energy management applications, integrated inductors are used to temporarily store energy and release it when needed.

Motor drive: In the motor control circuit, an integrated inductor is used to smooth the current and provide the necessary magnetic field.

Packaging and dimensions:

The packaging and dimensions of integrated inductors are diverse, and common ones include:

Surface Mount (SMD): Suitable for automated surface mount processes, such as stacked inductors, wire wound inductors, magnetic package inductors, etc.

Size codes: such as 0402, 0603, 0805, 1206, 1812, 2016, 3220, etc., each code represents a specific length and width.

When selecting integrated inductors, the following parameters need to be considered:

Inductance value: Determine the required inductance value based on the circuit design requirements.

Saturation current: The current value at which the inductance begins to saturate and loses its value.

Direct current resistance (DCR): The inherent resistance of an inductor, which affects power loss and efficiency.

Self resonant frequency (SRF): The self resonant frequency of an inductor at high frequencies, beyond which the inductor will no longer exhibit ideal inductance behavior.

Temperature rise: The maximum allowable temperature rise of an inductor during operation.

Size and packaging: Choose the appropriate size and packaging based on the actual installation space and process.

Manufacturers usually provide detailed product specifications and data sheets to help users make appropriate choices. Due to the wide variety of integrated inductors, the most suitable inductor product should be selected based on specific circuit design and application requirements. Meanwhile, considering the important role of integrated inductors in circuits, the stability of their quality and performance is crucial for the reliable operation of the entire system.