General-Purpose Three-Phase Gate Driver with TriC3™

Product Highlights > General-Purpose Three-Phase Gate Driver with TriC3™

            General-Purpose Three-Phase Gate Driver with TriC3™
                    The ROHM general-purpose three-phase gate driver offers TriC3 and constant current for consumer and industrial machinery
    

ROHM BD67870MWV-Z, BD67871MWV-Z, and BD67872MWV-Z three-phase brushless DC motor gate drivers deliver high-efficiency, reliable motor control for consumer, industrial, mobility, and power tool applications. The lineup supports supply voltages from 4.5 V to 60 V and drives three half-bridges using external N-channel MOSFETs. All devices support ultra-low standby current, integrated protection functions, and bootstrap-based gate drive architecture. Evaluation boards for each device include all required components such as capacitors, resistors, switches, pins, and sockets to simplify testing and prototyping.

The BD67871MWV-Z three-phase gate driver integrates TriC3, an active gate drive technology that monitors MOSFET voltages and dynamically adjusts gate drive current to reduce EMI, minimize heat, and enhance switching efficiency. Designed for brushless DC motor control up to 60 V, it supports direct constant-current gate drive, synchronous rectification during bootstrap charging, 100 percent duty cycle operation, and high-impedance state via trickle-charge pumping. It includes UART configurability, low standby current, and extensive protection features.

The BD67870MWV-Z general-purpose three-phase gate driver is designed for three-phase brushless DC motor control using six external N-channel MOSFETs up to 60 V. It supports wide-voltage operation, direct PWM input, adjustable dead time through an external resistor, ultra-low sleep current, and integrated protection circuits. The architecture enables efficient switching and 100 percent duty cycle capability.

The BD67872MWV-Z three-phase gate driver with 3x PWM mode offers similar performance to BD67870MWV-Z with support for 3x PWM input logic. It features a wide 4.5 V to 60 V input voltage range, bootstrap-based gate driver operation, adjustable dead time, and low sleep current. Enhanced protection includes latched V_REG UVLO and input V_CC UVLO.

Features

BD67871MWV-Z

Innovative TriC3 active gate drive with multi-level gate current control
Real-time gate current modulation based on sensed MOSFET output conditions
Dead-time adjustment control
Supports three-phase brushless DC motors up to 60 V
Bootstrap architecture with synchronous rectification during capacitor charging
Bootstrap gate driver with current source circuit enabling 100 percent duty cycle and high-impedance state
Supports 3.3 V and 5 V logic inputs
Supports negative transients down to -5 V on SH pins
Supports IN/IN and EN/IN input modes via UART
Compact QFN package
UART communication interface
TriC3 base current selectable via external resistor or internal constant current
Integrated LDO and charge pump for gate driver power supply
SHUNT pin for external current detection
Integrated protection including V_CC UVLO, bootstrap UVLO, V_REG UVLO, thermal shutdown, and fault indicator

Wide 4.5 V to 60 V input range
Ultra-low I_VCCQ below 1 µA in sleep mode
BD67870MWV-Z

Bootstrap gate driver with current source circuit enabling 100 percent duty cycle and high-impedance state via trickle charge pump
Integrated protection including thermal shutdown, input V_CC UVLO, and gate driver V_REG UVLO
Adjustable dead time from 10 ns to 3000 ns via external resistor
Supports 6x PWM input logic

BD67872MWV-Z
- Bootstrap gate driver with current source circuit enabling 100 percent duty cycle and high-impedance state via trickle charge pump
- Integrated protection including thermal shutdown, latched V_REG UVLO, and input V_CC UVLO
- Adjustable dead time from 10 ns to 3000 ns via external resistor
- Supports 3x PWM input logic

Applications

Three-phase, brushless, DC motors
Permanent magnet synchronous motors

Power tools
E-bikes, mobility