Achieves industry-leading power density by integrating 4th Generation SiC MOSFETs in a compact package
ROHM has developed four models as part of the TRCDRIVE pack series with 2-in-1 SiC molded modules (two of 750V-rated: BSTxxxD08P4A1x4, two of 1,200V-rated: BSTxxxD12P4A1x1) optimized for xEV (electric vehicles) traction inverters. TRCDRIVE pack supports up to 300kW and features high power density and a unique terminal configuration – helps solve the key challenges of traction inverters in terms of miniaturization, higher efficiency, and fewer person-hours.
As the electrification of cars rapidly advances towards achieving a decarbonized society, the development of electric powertrain systems that are more efficient, compact, and lightweight is currently progressing. However, for SiC power devices that are attracting attention as key components, achieving low loss in a small size has been a difficult challenge. ROHM solves these issues inside powertrains with its TRCDRIVE pack.
A trademark brand for ROHM SiC molded type modules developed specifically for traction inverter drive applications, TRCDRIVE pack reduces size by utilizing a unique structure that maximizes heat dissipation area. On top, ROHM’s 4th Generation SiC MOSFETs with low ON resistance are built in – resulting in an industry-leading power density 1.5 times higher than that of general SiC molded modules while greatly contributing to the miniaturization of inverters for xEVs.
The modules are also equipped with control signal terminals using press fit pins enabling easy connection by simply pushing the gate driver board from the top, reducing installation time considerably. In addition, low inductance (5.7nH) is achieved by maximizing the current path and utilizing a two-layer bus-bar structure for the main wiring, contributing to lower losses during switching.
Despite developing modules, ROHM has established a mass production system similar to discrete products, making it possible to increase production capacity by 30 times compared to conventional SiC case-type modules. To obtain samples, please contact a sales representative or visit the contact page on ROHM’s website.
Product Lineup
TRCDRIVE pack is scheduled to be launched by March 2025 with a lineup of 12 models in different package sizes (Small / Large) and mounting patterns (TIM: heat dissipation sheet / Ag sinter). In addition, ROHM is developing a 6-in-1 product with built-in heat sink that is expected to facilitate rapid traction inverter design and model rollout tailored to a variety of design specifications.
Application Examples
・ Automotive traction inverters
Comprehensive Support
ROHM is committed to providing application-level support, including the use of in-house motor testing equipment. A variety of supporting materials are also offered, such as simulations and thermal designs that enable quick evaluation and adoption of TRCDRIVE pack products. Two evaluation kits are available as well, one for double-pulse testing and the other for 3-phase full bridge applications, enabling evaluation in similar conditions as practical inverter circuits.
For details, please contact a sales representative or visit the contact page on ROHM’s website.
Terminology
Traction Inverter
Traction motors in electric cars are driven by 3-phase AC power with a phase shift of 120°. Traction inverters convert direct current supplied from the battery into 3-phase alternating current.
2-in-1
To convert DC into 3-phase AC, one high-side and one low-side MOSFET are required per phase for switching. A 2-in-1 configuration combines both of these MOSFETs into a single module.
