A3979 Overview
The A3979 is a plete microstepping motor driver with built-in translator, designed as a pin-patible replacement for the successful A3977, with enhanced microstepping (1/16 step) precision. It is designed to operate bipolar stepper motors in full-, half-, quarter-, and sixteenth-step modes, with an output drive capacity of up to 35 V and ±2.5 A. The A3979 includes a fixed off-time current regulator that has the...
A3979 Key Features
- ±2.5 A, 35 V output rating
- Low RDS(On) outputs: 0.28 Ω source, 0.22 Ω sink, typical
- Automatic current decay mode detection/selection
- 3.0 to 5.5 V logic supply voltage range
- Slow, Fast or Mixed current decay modes
- Home output
- Synchronous rectification for low power dissipation
- Internal UVLO and thermal shutdown circuitry
- Crossover-current protection