Hybrid Capacitor Layout for Thermal and Parasitic Loss Reduction
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Solution Overview
Problem
Conventional capacitors face challenges in achieving improved electrical, thermal, and noise vibration harshness (NVH) performance due to reliance on a single type of capacitor.
Innovation Solution
A hybrid capacitor design incorporating multiple types of capacitors, such as ceramic, film, and electrolytic capacitors, arranged in specific configurations on a substrate to enhance thermal and electrical performance, reduce stress on power switches, and improve noise vibration harshness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single type of capacitor is used, then the device complexity is reduced, but the electrical, thermal, and NVH performance cannot be improved sufficiently
Solution Approach 1:
The patent combines multiple types of capacitors (first capacitors, second capacitors, and third capacitors) into a single hybrid capacitor assembly mounted on one substrate. This merging approach allows the system to achieve superior electrical, thermal, and NVH performance by leveraging the complementary strengths of different capacitor types while maintaining a unified structural configuration.
Solution Approach 2:
The hybrid capacitor employs a composite structure integrating different capacitor technologies (such as ceramic, film, and electrolytic capacitors) on the same substrate. This composite approach enables the system to optimize both high-frequency and low-frequency performance characteristics, achieving enhanced overall reliability without relying on a single capacitor type.
2Reliability
If multiple types of capacitors are used, then electrical and thermal performance is improved, but the device complexity increases
Solution Approach 1:
The hybrid capacitor is segmented into distinct functional zones on the substrate: first capacitors positioned in a first region, second capacitors in a second region, and third capacitors in a third region. This segmentation allows each capacitor type to be optimized for its specific function while maintaining an organized, manageable structure that reduces the practical complexity of assembly and maintenance.
Solution Approach 2:
Different regions of the substrate are assigned different capacitor types based on local performance requirements. For example, first capacitors may be positioned near high-frequency switching nodes, while second capacitors are placed in regions requiring thermal management. This local optimization approach improves overall system performance while keeping the design systematic rather than random.
3Loss of energy
If capacitors are arranged in specific configurations, then loop size is reduced and parasitic losses decrease, but manufacturing precision requirements increase
Solution Approach 1:
The patent utilizes the two-dimensional surface of the substrate to strategically position different capacitor types in specific regions, optimizing current loop areas by distributing capacitors across different zones rather than concentrating them. This dimensional arrangement reduces parasitic inductance by minimizing current loop sizes while providing clear spatial separation that simplifies manufacturing alignment tolerances.
Data Source
AI summary
A hybrid capacitor includes a substrate having a first surface and a second surface opposite the first surface, a first end and a second end spaced from the first end, and a first side and a second side spaced from the first side. The hybrid capacitor further including one or more pins communicatively coupled to the substrate and one or more capacitors communicatively coupled to the substrate.