DRV10974 BLDC Motor Driver

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            DRV10974 BLDC Motor Driver
                    Texas Instruments' DRV10974 is a 12 V, three-phase, sensorless BLDC motor driver for use in white goods, BLDC motor modules, and fans/blowers/pumps
    

Image of Texas Instruments' DRV10974 BLDC Motor Driver Texas Instruments' 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 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 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.

There are many 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-R_DS(ON) MOSFETs help to conserve power while the motor is being driven.

Features
Input voltage range: 4.4 V to 18 V Total driver H + LR_DS(ON)750 mΩ (typical) at T_A = 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
Applications
White goods BLDC motor modules		Fans, blowers, and pumps