Key facts
- Brand
- Allegro
- Model
- A3977
- Category
- Other Electronics
- Documents
- 2
- Languages
- EN
- Last added
- 2012-08-04
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Allegro A3977 Microstepping DMOS Driver with Translator Datasheet
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.
Read onlineAllegro A3977 specifications
| 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 |
Source: Allegro A3977 Microstepping DMOS Driver with Translator Datasheet
All Allegro A3977 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What microstep resolutions does the A3977 support?
The device supports full-, half-, quarter-, and eighth-step modes.
From: Allegro A3977 Microstepping DMOS Driver with Translator Datasheet
How is the microstep resolution selected?
Resolution is set by inputs MS 1 and MS 2 according to a truth table.
From: Allegro A3977 Microstepping DMOS Driver with Translator Datasheet
What is the maximum load supply voltage for the A3977xED/LP?
The driver can operate with a load supply voltage up to 35 V.
From: Allegro A3977xED/A3977xLP Microstepping Driver Datasheet
Which microstepping modes are supported?
It supports full‑step, half‑step, quarter‑step, and eighth‑step modes.
From: Allegro A3977xED/A3977xLP Microstepping Driver Datasheet