SiC devices hold the key in the electric vehicle performance SiC devices are being increasingly adopted - primarily in DC/DC converters and onboard chargers for electric vehicles. This is due to their superior voltage resistance and loss characteristics which make them ideal for next-generation applications. SiC Device Performance Perhaps the biggest challenge for electric vehicles is maximizing cruising distance given the limited battery power. Switching Loss Comparison To this end, it is important to increase electricity costs in lieu of fuel economy. SiC devices are exceed the limits of Si...

•Improved inverter efficiency •Smaller, lighter cooling system SiC Reduces Battery Size SiC improves power consumption by 3 to 8% Reduces battery capacity while maintaining cruising range Dedicated EV Blocks ROHM is focused on a variety of applications for electric vehicles, including the main inverter, onboard charger, and DC/DC converter. And going forward, in response to emerging trends such as greater miniaturization due to higher frequency drive, larger battery voltages, and improved set efficiency, the adoption of SiC devices is expected to only increase. ROHM achieves superior quality and...

ON-BOARD CHARGER On-board chargers consist of AC/DC converters that convert an AC voltage ge y. (100V to 240V) to a DC voltage in order to charge the high voltage battery. To ensure worldwide compatibility, the permissible input voltage for many on-board chargers ranges from 85V to 265V. And to meet market needs for shorter charge times, the voltage specified under fast charging standards is increased, along with battery voltage. As a result, on-board chargers tend to have higher permissible input voltage, age , e promoting the use of SiC not only for the internal diodes, but MOSFETs as w e ll....

DC / DC CONVERTER In EVs the engine is replaced by a high voltage battery and motor. The DC/DC converter switches power elements and utilizes a transformer to convert the high battery voltage to a lower voltage. To protect low voltage electronic circuits, it is necessary to electrically isolate Low Voltage Battery both the signal and ground from the low and high voltage boards. ROHM DC/DC converters with built-in SiC MOSFET enable high-speed switching, making it possible to achieve greater miniaturization and higher performance while improving safety. High Voltage DC/DC CONVERTER SiC MOSFET Isolated...

MAIN INVERTER The main inverter converts DC voltage supplied by the battery into 3-phase AC voltage for driving the motor. Conventional power devices for inverters typically utilize a combination of IGBTs and diodes, but SiC MOSFETs that reduceconduction and switching losses are DC/DC Converter attracting increased attention. Low Voltage ECU High Voltage MAIN INVERTER HV Battery Isolated Gate Driver Voltage Regulator Current Buffer Isolated Gate Driver Current Buffer Isolated Gate Driver Isolated Gate Driver Current Buffer Isolated Gate Driver Current Buffer SiC MOSFET Isolated Gate Driver Current...

ELECTRIC COMPRESSOR In EVs, the AC compressor is electric. High voltage is used to increase motor efficiency, and for inverters that control rotation as well, high voltage, along with high reliability and high efficiency, are important factors. ROHM IGBTs for electric compressors are low-loss devices that achieve superior short-circuit tolerance. MOSFET Diode Fl b k Flyback Power Supply Low Ohmic MOSFET SBD Resistor Gate Driver IGBT IGBT Gate Driver Gate Driver High Withstand Voltage Low Withstand Voltage Memory Voltage Detector (Reset IC) RESISTORs Features such as high power handling capability...

Automotive Catalog Includes detailed information on the ROHM Group's broad range of automotive products. We offer an extensive lineup of automotive-grade products and solutions that support the continuing electronification and evolution of today's and next-generation vehicles. Power Device Catalog Introduces ROHM's industry-leading products for power applications. Also included are high voltage, high efficiency devices utilizing SiC. Please refer to our next-generation Eco Devices that contribute to greater energy savings and reduced CO2 emissions. Creating a safer, more secure automotive society...