Datasheet Details
| Part number | A3981 |
|---|---|
| Manufacturer | Allegro |
| File Size | 2.88 MB |
| Description | Automotive Programmable Stepper Driver |
| Datasheet |
 A3981 Datasheet
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Description
TheA3981 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.
Features
- 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 feat.