With the gradual maturation of gallium nitride (GaN) technology, an increasing number of AC/DC converters are adopting GaN as switching elements to replace traditional silicon components. In the application of this new technology, conductive capacitors also play a crucial role.
YMIN has long been committed to the development of conductive capacitors for use in GaN-based AC/DC converters and has achieved successful applications across multiple industries, such as fast charging (from the past IQ fast charging, PD2.0, PD3.0, PD3.1), laptop adapters, electric bicycle fast charging, onboard chargers (OBC)/DC fast charging piles, server power supplies, and more. These new conductive capacitors can fully complement the excellent characteristics of GaN, performing excellently in practical application scenarios and meeting customers’ needs for performance improvement and iterative upgrades. Below, we will detail their application characteristics.
01 GaN helps miniaturize AC/DC converters
Most circuits use DC voltage instead of AC voltage, and AC/DC converters are essential as devices that convert commercial AC power supplied to homes and businesses into DC power. When the power is the same, the trend is to miniaturize converters from the perspective of space saving and portability.
The use of GaN (gallium nitride) has made significant progress in the miniaturization of AC/DC converters. Compared with traditional Si (silicon) components, the advantages of GaN are smaller switching losses, higher efficiency, higher electron migration speed and conductive properties. This allows the AC/DC converter to more finely control switching operations, resulting in more efficient energy conversion.
In addition, high switching frequencies can be selected, allowing the use of smaller passive components. This is because GaN can maintain high efficiency even at high-frequency switching, comparable to low-frequency switching of Si.
02 The important role of conductive capacitors
In the design of AC/DC converters, output capacitors are crucial. Conductive capacitors can help reduce the ripple of the output voltage and play an important role in filtering in high-power switching circuits. When the capacitor absorbs the ripple current, it will inevitably generate a ripple voltage. In practical applications, it is usually required that the power supply ripple does not exceed 1% of the operating voltage of the equipment.
If GaN is used, the ESR of YMIN solid-liquid hybrid capacitors is stable in the wide range of 10KHz~800KHz, which can meet the requirements of GAN high-frequency switching.
Therefore, in AC/DC converters using gallium nitride, conductive capacitors become the best output capacitors.
03 YMIN matched with corresponding conductivity capacitor
With the adoption of GaN, the use of high-frequency switching AC/DC converters has gradually increased. In order to continue to meet the changing needs of customers, YMIN, as a market innovator in conductive capacitors, uses its cutting-edge high-performance/high-reliability technology to bring customers innovative, comprehensive product lineups (up to 100V) and quality services.
| Products Category | Dimension | Features | Corresponding AC/DC output voltage | Typical Uses |
| Polymer solid aluminum electrolytic capacitor | Diameter: Φ3.55~18mmHeight: 3.95~21.5mm | 1. Large capacity2. Large ripple current3. Wide frequency and low ESR4. Wide voltage range | 12~48V typ | AC/DC converters for industrial/communication equipment with a wide power range,AC adapters/chargers |
| Polymer Hybrid Aluminum Electrolytic Capacitors | Diameter: Φ4~18mmHeight: 5.8~31.5mm | 1. Large capacity2. Large ripple current3. Wide frequency and low ESR4. Low leakage current5. Vibration resistance6. Wide temperature stability7. High temperature and high humidity stability | 2~48V typ | AC/DC converters for automotive/industrial/communication equipment with a wide power range |
| Multilayer polymer solid aluminum electrolytic capacitor | Area: 7.2×6.1mm7.3×4.3mmHeight: 1.0~4.1mm | 1. Small size2. Large capacity3. Withstands ultra-large ripple current4. Wide temperature stability5. Good high-frequency characteristics | 2~48V Typ | Wireless charging server |
| Polymer Tantalum Capacitors | Area: 3.2×1.6mm3.5×2.8mmHeight: 1.4~2.6mm | 1. Ultra-small size2. Ultra-high energy density3. High ripple current resistance4. Wide temperature stability5. Good high-frequency characteristics | 2~48V Typ | Wireless chargingComputer server |
Our polymer solid aluminum electrolytic capacitors, polymer solid-liquid hybrid aluminum electrolytic capacitors, multilayer polymer solid aluminum electrolytic, and polymer tantalum capacitor series products can all be efficiently matched with new AC/DC converters.
These conductive capacitors are widely used in 5-20V outputs widely used in civilian equipment, 24V outputs for industrial equipment, and 48V outputs for communication equipment. In order to cope with the power shortage problem in recent years, higher efficiency is needed, and the number of products switching to 48V is increasing (automotive, data centers, USB-PD, etc.), further broadening the application range of GaN and conductive capacitors.
04 Conclusion
In the new era, YMIN adheres to the service concept of “Capacitor Solutions, Ask YMIN for your applications”, is determined to achieve new requirements and new breakthroughs through new applications and new solutions, and actively explores the prospects of miniaturization of AC/DC converters under GaN applications. YMIN insists on focusing on new product development, high-precision manufacturing and application-end promotion, providing customers with high-quality conductive capacitors, providing innovative and high-quality services, increasing research investment, and promoting industry progress.
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