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- Manuals
- 2
- Languages
- EN
- Last added
- 2012-08-03
Featured Allegro MicroSystems manuals
Allegro A3957SA/A3957SLB Full-Bridge PWM Microstepping Motor Driver Datasheet
The A3957SA and A3957SLB are full‑bridge PWM motor driver ICs designed to drive one winding of a bipolar stepper motor in microstepping mode. They provide continuous output currents up to ±1.5 A, support supply voltages up to 50 V, and include internal PWM current control, a 4‑bit non‑linear DAC, and selectable current‑decay modes (slow, fast, mixed).
Electrical specifications include a logic supply range of 4.5‑5.5 V, PWM turn‑off times of 18.2‑22.3 µs, and a thermal‑shutdown temperature of 165 °C. The devices are offered in a 16‑pin DIP (A3957SA) or a 24‑lead SOIC (A3957SLB) package, with detailed pin assignments for PWM control, sense, and output connections.
Covers: Features · Absolute Maximum Ratings · Electrical Characteristics · Functional Description · Current‑Decay Modes · Terminal Functions
Allegro MicroSystems A3046EU/LU A3056EU/LU A3058EU/LU Hall Effect Gear-Tooth Sensors Datasheet
Allegro MicroSystems' Hall effect gear‑tooth sensors (A3046EU/LU, A3056EU/LU, A3058EU/LU) are monolithic ICs that detect differential magnetic fields from ferrous gear teeth, providing zero‑speed operation for speed, position, and timing applications. They can be configured for various switching modes and are suitable for automotive ABS, ignition timing, and industrial speed‑measurement systems.
The datasheet lists electrical parameters such as a 4.5‑24 V supply range, 20 mA output current, and temperature ranges of –40 °C to +85 °C (EU) or –40 °C to +150 °C (LU). It also covers magnetic characteristics, recommended magnet materials, pole‑piece design, and assembly techniques to achieve reliable operation across wide air gaps and temperatures.
Covers: Benefits · Selection Guide · Electrical Characteristics · Magnetic Characteristics · Typical Operating Characteristics · Applications Information
Latest Allegro MicroSystems manuals
Allegro A3957SA/A3957SLB Full-Bridge PWM Microstepping Motor Driver Datasheet
Datasheet 16 pages · 194 KB · ENThe Allegro A3957SA and A3957SLB datasheet details specifications, electrical characteristics, and pin functions for a full‑bridge PWM microstepping motor…
Allegro MicroSystems A3046EU/LU A3056EU/LU A3058EU/LU Hall Effect Gear-Tooth Sensors Datasheet
Datasheet 8 pages · 100 KB · ENThe datasheet details specifications, operating characteristics, and application information for Allegro MicroSystems' A3046EU/LU, A3056EU/LU, and…
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Datasheet
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in Allegro MicroSystems manuals
What is the maximum continuous output current of the A3957 driver?
The driver can supply a continuous output current of up to ±1.5 A.
From: Allegro A3957SA/A3957SLB Full-Bridge PWM Microstepping Motor Driver Datasheet
Which current‑decay modes are available?
The A3957 supports three current‑decay modes: slow decay, fast decay, and mixed decay.
From: Allegro A3957SA/A3957SLB Full-Bridge PWM Microstepping Motor Driver Datasheet
What supply voltage range do the sensors operate over?
The sensors operate with a supply voltage between 4.5 V and 24 V.
From: Allegro MicroSystems A3046EU/LU A3056EU/LU A3058EU/LU Hall Effect Gear-Tooth Sensors Datasheet
What is the maximum output current the sensors can drive?
Each sensor can source up to 20 mA of output current.
From: Allegro MicroSystems A3046EU/LU A3056EU/LU A3058EU/LU Hall Effect Gear-Tooth Sensors Datasheet