Motors account for approximately 60% of global electricity consumption, making control technology, which impacts energy efficiency, increasingly important. In 12V to 48V motor drive applications, a simple configuration with one MCU controlling three gate drivers has been the norm. However, in recent years, increased demand for high efficiency and precise control has accelerated the adoption of solutions combining an MCU with an integrated three-phase motor controller. Furthermore, a key technical challenge in three-phase motor controllers has been balancing energy consumption reduction with noise/EMI (electromagnetic interference) reduction.
The BD67871MWV-Z features ROHM's patented "TriC3™" Active Gate Drive technology, which rapidly detects voltage information from external power field-effect transistors and adjusts the gate drive current accordingly in real time. This greatly reduces field-effect transistor switching losses (and therefore heat generation) and power consumption during switching, while also suppressing transient oscillation for low electromagnetic interference.
Compared to ROHM's conventional constant current drive products, the TriC3™ gate drive has been shown in real motors to reduce field-effect transistor heat generation by approximately 35%, while maintaining equivalent levels of electromagnetic interference. Furthermore, the BD67871MWV-Z uses the UQFN28 package and pinout commonly found in motor driver ICs for medium-voltage industrial equipment applications, thus reducing the engineering effort required for circuit modifications and new designs.
Mass production of the new product began in September 2025. Both this product and its evaluation board (BD67871MWV-EVK-003) for application development are available for purchase online through online distributors such as DigiKey and MOUSER.
ROHM also offers general-purpose motor drivers (BD67870MWV-Z, BD67872MWV-Z) with the same package and pin configuration as the new product, designed for constant voltage drive. From general-purpose types to value-added types incorporating the new TriC3™, we offer a complete range of products compatible with a wide variety of applications and use cases. Our commitment is to help improve motor efficiency, increase application functionality, and reduce energy consumption.
Application examples
• Industrial equipment: various motors, such as electric drills and screwdrivers and industrial fans
• Consumer applications: various motors used in vacuum cleaners, air purifiers, air conditioners, fans and electric bicycles (electrically assisted sports bicycles)
TriC3™
is a multi-step constant current drive technology developed by ROHM. By controlling the gate current in three steps, it achieves high-speed, high-performance operation while minimizing electromagnetic interference by suppressing transient oscillation.
• TriC3™ is a trademark or registered trademark of ROHM Co., Ltd.
