PQFN Package Integrating Control and Driver Circuits
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Solution Overview
Problem
Quad flat no-lead (QFN) packages face challenges in complexity and electrical routing, particularly for complex configurations, limiting their ability to house multiple electrical components efficiently and effectively.
Innovation Solution
A power quad flat no-lead (PQFN) package incorporating control and driver circuits, including a common IC with integrated control circuitry and driver circuitry, which simplifies circuit design, reduces costs, and enhances performance by enabling the direct driving of multi-phase power inverters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If QFN packages are used for complex configurations, then electrical routing capability is improved, but device complexity increases
Solution Approach 1:
The package is divided into multiple functional sections: a first section containing power semiconductor devices and a second section containing control circuits and driver circuits. This segmentation allows complex electrical routing to be organized into manageable sections, improving adaptability while controlling overall complexity.
Solution Approach 2:
The patent utilizes vertical stacking of functional sections within the package footprint, transitioning from a planar two-dimensional layout to a three-dimensional arrangement. This enables complex electrical routing capabilities by utilizing the vertical dimension for interconnections between power devices and control circuits.
2Productivity
If multiple electrical components are housed in QFN package, then integration efficiency is improved, but electrical routing difficulty increases
Solution Approach 1:
By segmenting the package into distinct functional sections (power section and control section), the patent simplifies the electrical routing process despite housing multiple components. Each section can be designed and routed independently, improving integration efficiency while managing routing difficulty.
Solution Approach 2:
The patent combines power semiconductor devices with their associated control and driver circuits in a single integrated package. This merging of previously separate components into one unified package improves integration efficiency by reducing the number of discrete parts while the sectional organization manages the resulting routing complexity.
Data Source
AI summary
According to an exemplary implementation, a power quad flat no-lead (PQFN) package includes a multi-phase power inverter, a control circuit, and a driver circuit. The driver circuit is configured to drive the multi-phase power inverter responsive to a control signal from the control circuit. The multi-phase power inverter, the control circuit, and the driver circuit are each situated on a PQFN leadframe of the PQFN package. The control circuit and the driver circuit can be in a common integrated circuit (IC). Furthermore, the control circuit can be configured to reconstruct at least two phase currents of the multi-phase power inverter from a combined phase current.