ROHM's SiC Molded Modules Set New Standards for EV Onboard Chargers

2025-04-25 power

Berlin, Friday, 25 April 2025.
ROHM unveils advanced SiC molded modules, enhancing efficiency and miniaturization in EV onboard chargers. These innovations operate 38°C cooler and triple power density compared to discretes.

Revolutionary Design and Integration

ROHM’s latest innovation, announced on April 24, 2025, introduces a comprehensive lineup of thirteen models across two voltage classes - six models rated at 750V (BSTxxx1P4K01) and seven at 1200V (BSTxxx2P4K01) [1][2]. The HSDIP20 package represents a significant advancement in power module design, integrating all essential circuits required for power conversion in a compact form factor of 38.0 mm x 31.3 mm with a maximum height of 3.5 mm [3].

Superior Thermal Performance

The modules demonstrate exceptional thermal management capabilities, operating approximately 38°C cooler than conventional discrete configurations during 25W operation [4]. This remarkable thermal performance is achieved through the integration of an insulating substrate with superior thermal conductivity [5]. The enhanced heat dissipation enables the modules to maintain optimal performance while delivering industry-leading power density - more than three times higher than top-side cooled discretes and 1.4 times that of comparable DIP type modules [1][4].

Practical Applications and Availability

These modules are specifically optimized for power factor correction (PFC) and LLC converters in onboard chargers for electric vehicles, with additional applications including electric compressors, EV charging stations, and AC servos [6]. The innovative design achieves approximately 52% reduction in mounting area compared to traditional configurations [1]. ROHM has commenced OEM quantity shipments as of April 2025, with sample pricing set at $100 per unit, excluding tax [7].

Future Development Roadmap

Moving forward, ROHM has committed to advancing the development of SiC modules that balance miniaturization with high efficiency [1]. The company is particularly focused on developing automotive SiC Intelligent Power Modules (IPMs) that will offer even higher reliability in smaller form factors [6]. To facilitate adoption, ROHM provides comprehensive evaluation kits for both double-pulse testing and three-phase full bridge applications [4].

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SiC modules power conversion