Wolfspeed. has been granted a patent for a power converter module featuring an active metal braze substrate with an aluminum nitride base. The design enhances thermal dissipation and structural integrity, incorporating silicon carbide switching components and achieving a stray inductance of less than 15 nH in its boost converter circuitry. GlobalData’s report on Wolfspeed gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Wolfspeed, Quantum dot devices was a key innovation area identified from patents. Wolfspeed's grant share as of June 2024 was 66%. Grant share is based on the ratio of number of grants to total number of patents.
Power converter module with improved thermal dissipation characteristics
The granted patent US12046998B2 describes a power converter module designed to enhance efficiency and performance in power delivery applications. Central to the invention is a substrate that supports power converter circuitry, which includes multiple switching components interconnected through a conductive layer. This configuration allows the circuitry to function as a boost converter, specifically engineered to maintain a stray inductance of less than 15 nH. The design further divides the circuitry into two channels, optimizing the lengths of the gate control and power switching paths to achieve the desired inductance specifications. The module is capable of delivering output voltages exceeding 650V and output power greater than 900W, while operating at switching frequencies above 40 kHz.
Additionally, the patent outlines the integration of silicon carbide (SiC) semiconductor components within the power converter module, which includes MOSFETs and diodes. The design incorporates snubber circuitry to mitigate transient signals, enhancing the reliability of the power delivery system. The module's architecture allows for external diode configurations and includes an inner-loop capacitor to reduce parasitic inductance. The use of high-frequency ceramic capacitors is also specified, further contributing to the module's performance. Overall, the patent presents a comprehensive approach to power conversion, emphasizing low inductance and high efficiency in high-voltage applications.
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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.
