Three-phase Full-wave Fan Motor Driver - BD6346FV

BD6346FV is a three phase, sensorless motor 1chip driver with integrated power DMOS MOSFETs. Its feature is sensor-less drive which doesn’t require a hall device as a location detection sensor. Furthermore, introducing a PWM soft switched driving mechanism achieves silent operations and low vibrations.

* This product is a STANDARD grade product and not recommend for on-vehicle devices.
Part Number
Unit Quantity
Minimum Package Quantity
Packing Type
BD6346FV-E2 Active SSOP-B20 2500 2500 Taping Yes
Grade Standard
Usage General
Type Driver
Vcc (Max.)[V] 20.0
Power Supply Voltage (Max.)[V] 17.0
Power Supply Voltage (Min.)[V] 5.5
Iout (Max.)[A] 1.2
Speed Control Input DC/PWM
For Fan Motor Yes
Operating Temperature (Min.)[°C] -40
Operating Temperature (Max.)[°C] 100
    • Integrated Power DMOS FET driver
    • Sensorless PWM soft switched drive
    • Lock protection and automatic restart
    • DC voltage/direct PWM input ,speed control
    • Current limit
    • Soft-Start function
    • Quick-Start function
    • Rotating speed pulse signal(FG)output
    • UVLO
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New Products:
Technical Data
Thermal Resistance

The definition and how to use thermal resistance and thermal characterization parameter of packages for ROHM’s integrated circuit are described in this application note.