12W, 12V 3-Phase Sensorless BLDC Motor Driver

12W, 12V 3-Phase Sensorless BLDC Motor Driver - DRV10974

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The DRV10974 device is a three-phase sensorless motor driver with integrated power MOSFETs, which can provide continuous drive current up to 1 A (rms). The device is designed for cost-sensitive, low-noise, and low-external-component-count applications.

The DRV10974 device uses a proprietary sensorless control scheme to provide dependable commutation. The 180° sinusoidal commutation significantly reduces pure tone acoustics that are typical with 120° (trapezoidal) commutation. The DRV10974 spin-up is configured using a single external low-power resistor. The current limit can be set by an external low-power resistor.

The DRV10974 device provides for simple control of motor speed by applying a PWM input to control the magnitude of the drive voltage, or by driving the PWM pin with an analog voltage and monitoring the FG pin for speed feedback.

The DRV10974 device includes a number of features to improve efficiency. The resistor-configurable lead angle allows the user to optimize the driver efficiency by aligning the phase current and the phase BEMF. In addition, the use of low-rDS(on) MOSFETs helps to conserve power while the motor is being driven.


  • Input Voltage Range: 4.4 V to 18 V
  • Total Driver H + L rDS(on) 750 mΩ (Typical) at TA = 25°C
  • Phase Drive Current: 1-A Continuous (1.5-A Peak)
  • 180° Sinusoidal Commutation for Optimal Acoustic Performance
  • Resistor-Configurable Lead Angle
  • Resistor-Configurable Current Limit
  • Soft Start With Resistor-Configurable Acceleration Profile
  • Built-In Current Sense to Eliminate External Current-Sense Resistor
  • Proprietary Sensorless Control Without Motor Center Tap
  • Simple User Interface:
    • One-Pin Configuration for Start-Up
    • PWM Input Designates Magnitude of Voltage Applied to Motor
    • Open-Drain FG Output Provides Speed Feedback
    • Pin for Forward and Reverse Control
  • Fully Protected:
    • Motor-Lock Detect and Restart
    • Overcurrent, Short-Circuit, Overtemperature, Undervoltage

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Parametrics Compare all products in Brushless DC Drivers with FETs

Vs (Min) (V)
Vs (Max) (V)
RMS Output Current (A)
Peak Output Current (A)
RDS(ON) (HS + LS) (mOhms)
Number of Half Bridges
Control I/F
Operating Temperature Range (C)
DRV10974 DRV10970 DRV10975
4.4    5    6.5   
18    18    18   
1    1    1.5   
1.5    1.5    2   
800    400    250   
3    3    3   
PWM or Analog    PWM    PWM, Analog, or I2C   
Self-tuning, external resistor for configurable start profiles, 5 stage rotor lock protection    180 Degree Sinusoidal Commutation
Adaptive Drive Angle Adjustment (ADAA)
Hall Sensor Flexibility
Full Protection Suite   
180 Degree Sinusoidal Commutation
100mA Step Down Buck
Rotor Lock Protection   
-40 to 125    -40 to 125    -40 to 125