A3955 Description
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. Internal pulse width modulated (PWM) current control bined 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.
A3955 Key Features
- ±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