ROHM's Three-Phase Brushless DC Motor Gate Driver Minimizes FET Heat Generation and EMI

Executive Summary

• ROHM Semiconductor announced the launch of the BD67871MWV‑Z, a three‑phase brushless DC motor gate driver featuring TriC3™ active gate‑drive technology for 12 V–48 V medium‑voltage systems.
• The new device reduces FET switching loss by ~35 % and suppresses EMI, delivering higher efficiency for industrial equipment, consumer appliances, and e‑bikes.
• Mass production began in September 2025; the part and an evaluation board are now available for purchase through major distributors (DigiKey, Mouser).

Key Details

• Product: BD67871MWV‑Z three‑phase brushless DC motor gate driver.
• Technology: Integrates ROHM’s TriC3™ “Active Gate Drive” that continuously monitors external FET voltage and dynamically adjusts gate‑drive current in real time.
• Performance Gains: ~35 % reduction in FET heat generation versus conventional constant‑current drive solutions, with no loss of EMI performance.
• Voltage Range: Designed for medium‑voltage motor systems operating between 12 V and 48 V.
• Package: Compact UQFN28 package compatible with existing motor driver IC footprints, simplifying redesign.
• Related Products: General‑purpose drivers BD67870MWV‑Z and BD67872MWV‑Z (constant‑voltage drive) share the same package and pin layout.
• Application Examples:
• Industrial equipment – electric drills/drivers, industrial fans.
• Consumer appliances – vacuum cleaners, air purifiers, air conditioners, ventilation fans.
• E‑bikes – electric‑assist bicycles.
• Production Status: Mass production started September 2025.
• Availability: BD67871MWV‑Z and evaluation board (BD67871MWV‑EVK‑003) are available for online purchase via DigiKey, Mouser, and other distributors.

Notable Quotes

• “The BD67871MWV‑Z integrates ROHM's Active Gate Drive technology ‘TriC3™,’ which continuously monitors voltage characteristics at the external power FETs and dynamically adjusts the gate drive current in real time… reducing FET switching losses while suppressing ringing to achieve low EMI.” – Heike Mueller, ROHM Semiconductor.