A3977xED and A3977xLP are complete microstepping motor drivers with built-in translator. They are designed to operate bipolar stepper motors in full-, half-, quarter-, and eighth-step modes, with output drive capability of 35 V and ±2.5 A.
The A3977 is a complete microstepping DMOS driver with an integrated translator designed to operate bipolar stepper motors in full-, half-, quarter-, and eighth-step modes. It features output drive capability of 35V and ±2.5A, utilizing fixed off-time current regulation to reduce audible noise and power dissipation.
| Output Current | ±2.5 A |
|---|---|
| Load Supply Voltage | 8.0 – 35 V |
| Logic Supply Voltage | 3.0 to 5.5 V |
| Operating Temperature (Kx) | -40°C to +125°C |
| Package Power Dissipation (LP) | 28°C/W |
The device supports full-, half-, quarter-, and eighth-step modes.
Resolution is set by inputs MS 1 and MS 2 according to a truth table.