What is the difference between a monolithic inductor and a conventional inductor?

2022-06-11 13:00

An inductive coil is a device that operates on the principle of electromagnetic induction. When an electric current flows through a conductor, it generates a magnetic field around the conductor; this magnetic field, in turn, induces an electromotive force in the conductor itself. The effect of the conductor’s own magnetic field—i.e., the self‑inductance—arises from changes in the conductor’s current and the resulting magnetic field, which subsequently influences the current within the conductor. Meanwhile, the influence of this magnetic field on other conductors is referred to as mutual inductance. So, what are the differences between a monolithic inductor and a conventional inductor?

Integrated molded inductor What is the difference between it and a conventional inductor?

An inductive coil is a device that operates on the principle of electromagnetic induction. When an electric current flows through a conductor, it generates a specific electromagnetic field around the conductor; this field, in turn, induces an electromotive force in the conductor itself. The effect of the conductor’s own electromagnetic field—namely, the changing magnetic field produced by variations in the current—on the current within the conductor is called “self-inductance.” Meanwhile, the influence of this electromagnetic field on other conductors is referred to as “mutual inductance.” So, Integrated molded inductor What is the difference between it and a conventional inductor?

Integrated molded inductor What is the difference between it and a conventional inductor?

1. Performance and Stability

Compared with traditional chip‑type inductors, integrated inductors offer superior capabilities for handling high currents and withstanding elevated temperatures, while also delivering exceptional circuit stability. Owing to these advantages—features that conventional surface‑mount inductors lack—they are widely employed in cutting‑edge applications, such as military power supplies, automotive chargers, new‑energy vehicles, next‑generation mobile devices, computer motherboards, and smart electronic products. As an inductor manufacturer certified to automotive‑grade standards, we firmly recognize the critical role of integrated inductors in ensuring reliable performance in new‑energy vehicles.

2. Structure and Production Technology

Integral molding is achieved through fully enclosed die casting. The forming process demands stringent control: excessive pressurization can damage the coil and lead to cracking, while insufficient pressure results in incomplete filling and inadequate product strength. Conventional chip inductors are typically constructed from surface-mount inductors. In terms of manufacturing and supply, they possess characteristics not found in other soft magnetic materials: excellent performance and precise shape control. By carefully adjusting alloy powder ratios and other process parameters, it is possible to produce inductors with a wide range of tailored properties.

3. Technical and Pricing Aspects

Integrated inductors are far more complex to manufacture than conventional surface-mount inductors, resulting in lower yield rates and higher prices. However, as manufacturing and R&D capabilities for integrated inductors continue to improve, their costs are expected to decline steadily.

What is the purpose of the integrated inductor in a TV?

1. In televisions, patch-type integrated inductors play a crucial role in frequency selection and filtering of data signals; this is a key function of integrated inductors in TV circuits.

2. How to handle signals with inductors integrated on SMDs:

(1) The television receives a high-frequency signal from the tuner via the antenna, which is then fed into the tuner. After the on‑board integrated inductor performs frequency selection and filtering, it isolates the high‑frequency data signal required by the TV. At this point, the high‑frequency data signal is routed to the TV’s signal‑processing integrated circuit for further processing. The signal‑processing IC separates the high‑frequency signal into audio, video, and full‑satellite components, with the separated audio data being directed to the audio data’s secure channel.

(2) At the same time, the entire television signal is transmitted to the image-processing chip for color‑phase image processing, where integrated inductors play a role in coordinating all the separated signals. For example, televisions equipped with VGA signal reception are indispensable; they include a VGA encoding chip and a main chip on the TV encoding board that convert the received VGA signal into a standard video signal.

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In the current trend toward product miniaturization, inductor sizes continue to shrink to meet the demands of consumer electronics, automotive applications, fast‑charging systems, and AI devices for slimmer form factors and higher integration. Meanwhile, advances in high‑permeability, low‑loss magnetic powders and high‑performance coil materials enable small‑size components to satisfy requirements for high current handling and low losses.

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