The A3906 integrated circuit from Allegro MicroSystems (www.allegro.com) consists of a single-step motor control or double low-voltage DC motor control for operation with voltages from 2.5 to 9 V. The circuit has an internal current limit PWM and peak output current warning. In addition, its outputs are low rds(on) for less dissipation and it has the “brake” mode for DC motors. The figure shows the application circuit for two common DC motors.
