Date: 19/02/2009

Low voltage, bi-directional DC motor driver for portable applications

Allegro released new low voltage bi-directional DC motor driver, A3908, with a typical input voltage range of 3.0 V to 5.5 V and output currents up to 500 mA. The full-bridge output incorporates source side linear operation to allow a constant voltage supply across the motor coil. This regulated output minimizes motor voltage change due to Rds(on) variation and battery voltage tolerance. This new motor driver is targeted at the portable and instrumentation markets.

Two logic inputs are provided to control the motor direction of rotation, brake and standby (<500 nA supply current) modes and to allow optional PWM of the sink drivers. Internal protection circuitry includes thermal shut down, under voltage lockout, and crossover (shoot through) protection.

Package: 8-lead DFN package.
Size: 2.0 mm × 2.0 mm × 0.575 mm

Further information about Allegro can be found at www.allegromicro.com