The A3979 is a complete microstepping motor driver with built-in translator, designed as a pin-compatible replacement for the successful A3977, with enhanced microstepping (1/16 step) precision.
The A3979 is a complete DMOS microstepping motor driver featuring an integrated translator. It operates bipolar stepper motors in full-, half-, quarter-, and sixteenth-step modes with output ratings of +2.5A and 35V. The device includes automatic current decay mode detection, synchronous rectification for low power dissipation, and internal protection circuitry such as thermal shutdown and UVLO.
| Output current rating | +2.5 A, 35 V output rating |
|---|---|
| Logic supply voltage range | 3.0 to 5.5 V |
| Microstep Resolution | 1/16 step |
| Package type | 28 lead TSSOP |
| Operating Ambient Temperature | -20 to 85 °C |
The device has an output rating of +2.5 A.