Allegro MicroSystems A3955
The A3955 is designed to drive one winding of a bipolar stepper motor in a microstepping mode. The outputs are rated for continuous output currents to ±1.5 A and operating voltages to 50V.| Part No. | A3955 |
|---|---|
| Datasheet | A3955 Download |
| Manufacturer |  Allegro MicroSystems |
| Description | FULL-BRIDGE PWM MICROSTEPPING MOTOR DRIVER |
| Buy | Stock & Price |
FEATURES AND BENEFITS
● ±1.5 A continuous output current● 50 V output voltage rating
● Internal PWM current control
● 3-bit nonlinear DAC
● Fast, mixed fast/slow, and slow current-decay modes
● Internal transient-suppression diodes
● Internal thermal shutdown circuitry
● Crossover-current and UVLO protection Packages: Package B, 16-pin DIP with exposed tabs Package LB, 16-pin SOIC with internally fused pins Not to scale
DESCRIPTION
Internal pulse width modulated (PWM) current control combined with an internal three-bit nonlinear digitalto-analog converter allows the motor current to be controlled in full-, half-, quarter-, or eighth-step (microstepping) modes. Nonlinear increments minimize the number of control lines necessary
