Composite Electronic Component Side-Coupled Inductor Capacitor
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Solution Overview
Problem
The increasing number of DC to DC converters and passive elements in power management integrated circuits (PMICs) leads to larger component disposition areas and noise generation, limiting miniaturization and causing parasitic capacitance issues that deteriorate self resonance frequency (SRF) and quality (Q) factor.
Innovation Solution
A composite electronic component is designed with a capacitor coupled to the side surface of an inductor, featuring a ceramic body with stacked dielectric layers and a magnetic body with a coil part, along with optimized terminal placement to minimize parasitic capacitance and noise, thereby reducing the component mounting area and improving SRF and Q factor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the inductor and capacitor are vertically coupled to each other, then the component disposition area is decreased and noise generation is suppressed, but external terminals interfere with each other generating parasitic capacitance, lowering self resonance frequency and deteriorating quality factor
Solution Approach 1:
The patent transitions from vertical coupling to side surface coupling, changing the spatial dimension of component arrangement. The capacitor is coupled to the side surface of the inductor rather than vertically stacked, which maintains compact area while increasing terminal separation distance to reduce parasitic capacitance interference.
2Area of stationary object
If the inductor and capacitor are vertically coupled to each other, then the component disposition area is decreased, but the distance between external terminals is reduced, causing solder reflow defects during mounting
Solution Approach 1:
The patent changes the coupling dimension from vertical to side surface arrangement, which increases the distance between external terminals in the horizontal plane. This dimensional change maintains compact footprint while providing sufficient terminal separation for reliable solder reflow mounting.
3Adaptability or versatility
If the number of DC to DC converters and passive elements is increased to satisfy various service requirements, then functionality is improved, but the component disposition area is inevitably increased, limiting miniaturization
Solution Approach 1:
The patent combines the inductor and capacitor into a single composite electronic component with integrated magnetic body and ceramic body. This merging of multiple passive elements into one compact unit reduces the overall component disposition area while maintaining the necessary functionality for power management applications.
Solution Approach 2:
The capacitor is coupled to the side surface of the inductor, creating a nested-like compact structure where one component is positioned on the surface of the other. This nesting arrangement maximizes space utilization and minimizes the overall footprint of the composite component.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively decreases the component mounting area, suppresses noise generation, and maintains a high Q factor by minimizing parasitic capacitance and optimizing terminal placement, allowing for more efficient power management and reduced frequency limitations.
Implementation Method 1
a capacitor and an inductor are coupled to each other, the capacitor including a ceramic body in which a plurality of dielectric layers and first and second internal electrodes, disposed to face each other with respective dielectric layers interposed therebetween are stacked
Implementation Method 2
the inductor including a magnetic body including a coil part
Implementation Method 3
the inductor including a magnetic body including a coil part; the inductor suppresses the alternating current component of the received power
Data Source
AI summary
A composite electronic component includes a composite body in which a capacitor and an inductor are coupled to each other, the capacitor including a ceramic body including a plurality of dielectric layers and first and second internal electrodes, and the inductor including a magnetic body including a coil part. An input terminal is disposed on a first side surface of the composite body and is connected to the coil part. An output terminal includes a first output terminal disposed on the first side surface of the composite body and connected to the coil part and a second output terminal disposed on a first end surface of the composite body and connected to the first internal electrodes. A ground terminal is disposed on a second end surface of the composite body and is connected to the second internal electrodes. The capacitor is coupled to a side surface of the inductor.