Sensorless BLDC motor drivers designed for cost-sensitive fan and pump applications

Texas Instruments DRV10987 50W, 12V to 24V, three-phase sensorless BLDC motor drivers, available from Mouser, use a 180-degree sinusoidal motor driver integrated with power MOSFETs, provide continuous drive current up to 2A. The device operates at an ambient temperature of -40C to 125C, distributing current to the motor with a low supply voltage of 6.2V. Protection features encompass overcurrent protection when the power supply voltage is higher than 28V, lock detection that detects rotor lock condition, and AVS protection. Offering continuous sinusoidal drive, the device uses a proprietary sensorless control scheme considerably reducing the pure tone acoustics that typically transpires as a result of commutation. The easy and flexible I2C interface provides motor speed feedback simultaneously with the FG pin. Also, the I2C interface can be used to reprogram specific motor parameters in registers and to program the EEPROM, resulting in optimised performance in any specific application. Both internal and external circuits are powered by the integrated buck regulator which powers down the device to 5V. The device is available in a thermally-efficient HTSSOP-24 package with an exposed thermal pad and is specially designed for cost-sensitive, low-noise, low-external-component-count fan and pump applications.