IC Package Layout With Embedded MLCCs for Low-Resistance Power Conversion
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Solution Overview
Problem
Existing power converters face inefficiencies due to high routing resistance and material costs associated with integrating capacitors and switches, which affect the scalability and performance of power conversion systems in electronic devices.
Innovation Solution
The integration of a leadframe-based IC package with multi-layer ceramic capacitors directly coupled to switches via metal clips, encapsulated by a mold compound, along with a control circuit to manage switch states, reduces routing resistance and optimizes capacitor placement for efficient power conversion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If traditional routing methods are used to connect capacitors and switches, then manufacturing is easier, but routing resistance increases and power conversion efficiency decreases
Solution Approach 1:
The patent merges the capacitor and switch into a single integrated unit where the capacitor is directly coupled to the switch terminals. This integration eliminates separate routing traces and connection points, thereby reducing routing resistance and improving power conversion efficiency while simplifying the overall structure.
Solution Approach 2:
The capacitor is positioned in a three-dimensional space directly above or adjacent to the switch terminals, utilizing vertical or lateral spacing rather than planar routing. This dimensional change allows direct electrical coupling without requiring lengthy trace routing, thus reducing resistance while maintaining manufacturing simplicity.
2Loss of energy
If capacitors are integrated closer to switches, then routing resistance decreases and efficiency improves, but manufacturing precision requirements increase
Solution Approach 1:
By merging the capacitor and switch into an integrated unit with direct terminal coupling, the patent eliminates the need for precise separate placement and routing. The capacitor is structurally combined with the switch such that alignment tolerances are minimized, reducing manufacturing precision requirements while achieving low routing resistance.
Solution Approach 2:
The integrated unit is designed as a modular component that can be manufactured and tested separately before final assembly. This segmentation allows for standardized manufacturing processes with relaxed precision requirements, as the capacitor-switch integration is achieved through standardized connection interfaces rather than custom high-precision routing.
3Ease of manufacture
If more components are integrated into a single package, then material costs reduce and scalability improves, but device complexity increases
Solution Approach 1:
The patent combines multiple components (capacitor, switch, and their interconnections) into a single integrated unit packaged together. This merging reduces the total number of discrete components and material requirements, lowering material costs while the modular design keeps integration complexity manageable.
Solution Approach 2:
The integrated unit serves multiple functions within a single package: power conversion through the switch, energy storage through the capacitor, and simplified routing. This multi-functionality reduces the need for separate components and materials, decreasing overall material costs while the standardized interface design prevents excessive complexity.
Data Source
AI summary
Integrated circuit (IC) packages for facilitating power converter systems and methods are provided. In one example, an IC package includes a leadframe. The IC package further includes an IC die coupled to the leadframe. The IC die includes a plurality of switches and a control circuit configured to control a state of at least a subset of the plurality of switches. The IC package further includes a plurality of metal clips. The IC package further includes a plurality of multi-layer ceramic capacitors coupled to the IC die via the plurality of metal clips. Each multi-layer ceramic capacitor is coupled to a subset of the plurality of switches via a subset of the plurality of metal clips. The IC package further includes a mold compound to encapsulate the leadframe, the IC die, the metal clips, and the multi-layer ceramic capacitors. Related systems and methods are also provided.