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
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
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.