PCIM Keynote
Shanghai, September 25, 2025—At 11:40 AM today, at the PCIM Asia 2025 Technology Forum in Hall N4 of the Shanghai New International Expo Center, Mr. Zhang Qingtao, Vice President of Shanghai YMIN Electronics Co., Ltd., delivered a keynote speech titled “Innovative Applications of Capacitors in New Third-Generation Semiconductor Solutions.”
The speech focused on the new challenges posed by third-generation semiconductor technologies like silicon carbide (SiC) and gallium nitride (GaN) for capacitors under extreme operating conditions such as high frequency, high voltage, and high temperature. The speech systematically introduced YMIN capacitors’ technological breakthroughs and practical examples in achieving high capacitance density, low ESR, long life, and high reliability.
Key Points
With the rapid adoption of SiC and GaN devices in new energy vehicles, photovoltaic energy storage, AI servers, industrial power supplies, and other fields, the performance requirements for supporting capacitors are becoming increasingly stringent. Capacitors are no longer just supporting roles; they are now the critical “engine” that determines the stability, efficiency, and longevity of a system. Through material innovation, structural optimization, and process upgrades, YMIN has achieved comprehensive improvements in capacitors across four dimensions: volume, capacity, temperature, and reliability. This has become crucial for the efficient implementation of third-generation semiconductor applications.
Technical Challenges
1. AI Server Power Supply Solution · Collaboration with Navitas GaN. Challenges: High-frequency switching (>100kHz), high ripple current (>6A), and high-temperature environments (>75°C). Solution: IDC3 series low-ESR electrolytic capacitors, ESR ≤ 95mΩ, and a lifespan of 12,000 hours at 105°C. Results: 60% reduction in overall size, 1%-2% efficiency improvement, and 10°C temperature reduction.
2. NVIDIA AI Server GB300-BBU Backup Power Supply · Replacing Japan’s Musashi. Challenges: Sudden GPU power surges, millisecond-level response, and lifespan degradation in high-temperature environments. Solution: LIC square supercapacitors, internal resistance <1mΩ, 1 million cycles, and 10-minute fast charging. Results: 50%-70% reduction in size, 50%-60% reduction in weight, and support for 15-21kW peak power.
3. Infineon GaN MOS480W Rail Power Supply Replacing Japanese Rubycon. Challenges: Wide operating temperature range of -40°C to 105°C, high-frequency ripple current surges. Solution: Ultra-low temperature degradation rate <10%, ripple current withstand of 7.8A. Results: Passed -40°C low-temperature startup and high-low temperature cycle tests with a 100% pass rate, meeting the rail industry’s 10+ year lifespan requirement.
4. New Energy Vehicle DC-Link Capacitors · Matched with ON Semiconductor’s 300kW motor controller. Challenges: Switching frequency > 20kHz, dV/dt > 50V/ns, ambient temperature > 105°C. Solution: ESL < 3.5nH, lifespan > 10,000 hours at 125°C, and 30% increased capacity per unit volume. Results: Overall efficiency > 98.5%, power density exceeding 45kW/L, and battery life increased by approximately 5%. 5. GigaDevice 3.5kW Charging Pile Solution. YMIN offers in-depth support.
Challenges: PFC switching frequency is 70kHz, LLC switching frequency is 94kHz-300kHz, input-side ripple current surges to over 17A, and core temperature rise severely impacts lifespan.
Solution: A multi-tab parallel structure is used to reduce ESR/ESL. Combined with the GD32G553 MCU and GaNSafe/GeneSiC devices, a power density of 137W/in³ is achieved.
Results: System peak efficiency is 96.2%, PF is 0.999, and THD is 2.7%, meeting the high reliability and 10-20 year lifespan requirements of electric vehicle charging stations.
Conclusion
If you are interested in cutting-edge applications of third-generation semiconductors and eager to learn how capacitor innovation can improve system performance and replace international brands, please visit the YMIN booth, C56 in Hall N5, for a detailed technical discussion!
Post time: Sep-26-2025