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Have you truly grasped the recent discussions about Silicon Carbide (SiC) technology? This article aims to clarify several common misconceptions surrounding SiC.
1. SiC isn't just a substitute for silicon IGBTs: SiC MOSFETs, with a rated voltage of 650V, offer excellent performance and serve as strong competitors to silicon MOSFETs. They are suitable for various applications like full-bridge power factor correction and synchronous boost.
2. SiC is suitable for high-frequency applications: While initially popular in low-frequency high-power applications, recent advancements in SiC technology have made it suitable for operating at frequencies exceeding 100 kHz.
3. The SiC device supply chain is growing stronger: Despite previous hindrances due to supply chain issues, recent years have witnessed strengthening in the supply chain for SiC devices, ensuring availability.
4. Wide-ranging applications for SiC: SiC isn't limited to niche markets but finds extensive use in electric vehicle chargers, solar photovoltaic modules, cloud computing, enhancing power density, and efficiency.
5. SiC has a robust ecosystem: SiC's ecosystem is rapidly evolving, offering various SiC devices and gate drivers in the market.
6. Ease of use with SiC gate drivers: Despite initial complexities in design, modern SiC drivers now offer convenient features, making SiC easier to drive.
7. SiC doesn't necessarily require negative gate-to-source voltage: While a negative gate driving voltage is advantageous, it's not mandatory. Good layouts and high-current gate drivers can ensure the performance of SiC devices.
8. Isolated gate drivers enhance SiC design robustness: Isolated gate drivers tailored for SiC designs provide superior noise immunity.
9. SiC's ruggedness matches silicon IGBTs: Despite shorter short-circuit withstand times, SiC's wide bandgap grants it excellent avalanche ruggedness.
10. SiC solutions offer a high cost-performance ratio: Despite higher prices for SiC devices, overall cost savings in components like inductors and capacitors make it a cost-effective choice. SiC solutions also offer higher efficiency, reducing the need for bulky heat sinks.
11. Adaptability of SiC to high voltage: While SiC was previously thought to be intolerant to high voltages, research proves its adaptability to higher voltages, enabling rapid switching applications. For instance, onsemi has developed a series of 1700V M1 planar devices optimized for fast-switching applications.
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