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Motor Driver Integrates Hall Commutation

Mon, 01/26/2009 - 5:01am

Allegro A1448Designed to power low-voltage brushless DC motors, Allegro MicroSystems’ A1448 motor driver uses a CMOS semiconductor process to incorporate a Hall sensor, the motor control circuitry, and the full output bridge. A single input control pin allows for direct input PWM for speed control, initiating the active braking function, and engaging micro-power sleep mode. The sleep mode enables the removal of a FET transistor for switching the device on and off. The chip exhibits full device functionality down to 1.8 V VDD, reverse battery protection, output short circuit protection, and a soft-switching algorithm, a max. thickness of 0.4 mm, and an exposed pad. The 6-pin, DFN-packaged component is appropriate for haptic applications and vibration ring tones.

Allegro MicroSystems
508-853-5000, www.allegromicro.com

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