Introduction to EYANG Technology's Automotive-Grade Resonant Capacitors

 

Although the penetration rate of electric vehicles (EVs and PHEVs) has rapidly increased recently, the key challenge of EV’s cruise range is still a big challenge. Improving the range and reducing the losses in the DC-DC converters of On-Board Chargers (OBCs) to enhance power conversion efficiency is crucial. Utilizing LLC resonant circuits helps in improving the efficiency of DC-DC converters.

 

LLC converters employ Pulse Frequency Modulation (PFM), where the pulse amplitude needs to be stable and be controlled through the switching frequency. Therefore, resonant capacitors (Cr) must exhibit excellent temperature and frequency characteristics. In response to market demands, EYANG Technology has developed a series of automotive-grade resonant capacitors to meet the needs of automotive clients.

 

Advantages of EYANG’s MLCC Products

 

• Excellent Temperature Characteristics

  In resonant circuits, capacitors need to maintain very stable capacitance characteristics despite temperature changes. The EYANG automotive-grade resonant capacitor products use Class I ceramic materials (C0G) that exhibit stable temperature characteristics, with a capacitance change rate of ±30ppm/°C within the temperature range.

   

• Extremely Low ESR and Loss

  High currents passing through resonant capacitors generate heat. EYANG's automotive-grade resonant capacitors have very low ESR, that results in minimal energy loss, reducing heat generation and ensuring the overall stability of the circuit.

   

• Excellent Voltage Resistance

  LLC converters are used in high-power supplies, requiring resonant capacitors to have high voltage resistance. The EYANG resonant capacitors meet high-rated voltage requirements from 630Vdc to 2000Vdc, with reliability testing voltage capabilities reaching 1.2 to 1.5 times the rated voltage (depending on the specific model, refer to EYANG's specifications).

   

• High Reliability

  The EYANG resonant capacitor series is built on the IATF16949 system. Our products have passed AEC-Q200 certification tests, providing stringent environmental reliability test requirements such as 85°C-85%RH-rated voltage for 1,000 hours and 1,000 temperature cycles.

 

Material Characteristics

 

EYANG’s automotive -grade MLCCs use Class I ceramic (e.g., C0G), which has superior temperature and higher frequency characteristics compared to Class II ceramic (e.g., X7R) and film capacitors. EYANG’s automotive-grade MLCCs are highly suitable for LC and LLC resonant circuits.

 

EYANG’s Product Range

 

EYANG’s automotive-grade resonant capacitors provide the best performance in terms of typical sizes, capacitance, and voltage resistance parameters.

 

With the continuous growth of the electric vehicle market, the demand for resonant capacitors will continue to increase. EYANG Technology, leveraging its strong technical capabilities and deep understanding of industrial applications, has developed automotive-grade resonant capacitors that have earned certifications and recognitions from world-leading automotive manufacturers. In the future, EYANG Technology will continue to expand its range of automotive-grade capacitors to meet market demands.

For more detailed information about this specification, please visit the EYANG Technology website at http://www.szeyang.com to download the relevant specification sheets or contact EYANG Technology FAE for further information.