A3981
FEATURES
AND BENEFITS
- Peak motor current up to ±1.4 A, 28 V
- Low RDS(on) outputs, 0.5 Ω source and sink, typical
- Automatic current decay mode detection/selection
- Mixed, Fast, and Slow current decay modes
- Synchronous rectification for low power dissipation
- Internal OVLO, UVLO, and Thermal Shutdown circuitry
- Crossover-current protection
- Short-circuit and open-load diagnostics
- Hot and cold thermal warning
- Stall detect features
- SPI-patible or simple Step and Direction motion control
- Highly configurable via SPI-patible serial interface
APPLICATIONS
- Automotive stepper motors
- Engine management
- Headlamp positioning
PACKAGE:
28-Pin TSSOP with Exposed Thermal Pad (suffix LP)
Not to scale
DESCRIPTION
The A3981 is a flexible microstepping motor driver with built-in translator for easy operation. It is a single-chip solution, designed to operate bipolar stepper motors in full-, half-, quarter- and sixteenth-step modes, at up to 28 V and ±1.4 A. The A3981 can be...
