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Partname: | A3955SB-T |
Description: | Full-Bridge PWM Microstepping Motor Driver |
Manufacturer: | Allegro MicroSystems, Inc. |
Datasheet: | PDF (423K). Click here to download *) |
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 50 V. 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 for microstepping. Microstepping provides increased step resolution, and reduces torque variations and resonance problems at low speed. |
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