ALLEGRO MicroSystems has released a full-bridge motor driver designed to drive low-voltage, brushless DC motors.
The A1448 has a single input control pin which can control several functions, including speed, braking and a micro-power sleep mode, which reduces average power consumption.
The driver has an integrated Hall sensor that can detect the rotational position of an alternating-pole ring magnet to achieve commutation. A high-density CMOS semiconductor process ensures this sensor, as well as control circuitry and the full output bridge, is integrated with low voltage design.
The company says the device also has a soft-switching algorithm that reduces audible switching noises and EMI interference.
According to the manufacturer, the unit is designed for use in vibration motor applications in portable devices that fast stop start cycles.