Allegro MicroSystems, LLC Announces a New Dual Half-Bridge Motor Driver IC

Designed for Unidirectional Drive of Two DC Motors

April 23, 2013

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Worcester, MA – Allegro MicroSystems, LLC announces a new dual half bridge motor driver, designed for low cost, low voltage battery operated applications. This device offers features such as Thermal Shut-down (TSD) and sleep functionality in a small package that is competitive with equivalent discrete circuits. Allegro’s A3910 is targeted at the consumer market with end applications to include game controllers and home entertainment applications.

The outputs are rated for operation up to 500 mA. Direct control of high and low side drivers is implemented to allow either high side or low side PWM. The motor can be connected to either supply or GND. Using a MOS switch results in improved braking action for the motor, compared to implementation with simple clamp diode. The A3910 can also be used to drive a single bidirectional DC motor.

Allegro’s A3910EEETR-T is supplied in a 2 mm × 2 mm, 8-lead DFN package with exposed thermal pad (suffix EE). It is lead (Pb) free, with 100% matte-tin leadframe plating

Allegro MicroSystems, LLC is a leader in developing, manufacturing and marketing high-performance semiconductors. Allegro's innovative solutions serve high-growth applications within the automotive market, with additional focus on office automation, industrial, and consumer/communications solutions. Allegro is headquartered in Worcester, Massachusetts (USA) with design, applications, and sales support centers located worldwide. Further information about Allegro can be found at

Editorial Contact:

Stephanie Fennelly
Director - Marketing Communications
Tel: (508) 854-5363
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