A3977SLPTR-T

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A3977SLPTR-T

+BOM

IC MTR DRV BIPOLR 3-5.5V 28TSSOP

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Specifications

Attribute Value
Package Tape & Reel (TR),Cut Tape (CT)
ProductStatus Active
MotorType-Stepper Bipolar
Function Driver - Fully Integrated, Control and Power Stage
OutputConfiguration Half Bridge (4)
Interface Logic
Technology DMOS
StepResolution 1, 1/2, 1/4, 1/8
Applications General Purpose
Current-Output 2.5A
Voltage-Supply 3V ~ 5.5V
Voltage-Load 8V ~ 35V
OperatingTemperature -20°C ~ 150°C (TJ)
MountingType Surface Mount
Package/Case 28-TSSOP (0.173, 4.40mm Width) Exposed Pad

Overview

Description

The A3977SLPTR-T is a microstepping driver designed for controlling bipolar stepper motors. It is produced by Allegro MicroSystems and is well-suited for applications requiring precise control of motor speed and position. The device supports microstepping up to 1/8 steps, allowing for smooth and accurate movement. It operates with a supply voltage ranging from 7.5V to 50V and can deliver output currents up to 2.5A per phase.
The A3977SLPTR-T features a built-in translator for easy interfacing, minimizing the need for complex microcontroller programming to manage step sequences. It includes overcurrent protection, thermal shutdown, and crossover-current protection for enhanced reliability and safety. Its synchronous rectification feature improves power efficiency, reducing heat generation.
The device comes in a 28-lead TSSOP package with an exposed thermal pad, enabling efficient heat dissipation. This makes it suitable for compact and thermally constrained environments. The A3977SLPTR-T is typically used in printers, scanners, and other automation applications requiring precise motor control.

Equivalent

The A3977SLPTR-T is a microstepping motor driver from Allegro Microsystems. Its equivalent products include:
1. DRV8825 from Texas Instruments: A widely-used stepper motor driver with similar capabilities.
2. L6470 from STMicroelectronics: Another microstepping driver with additional features.
3. TB6600 from Toshiba: Suitable for higher-power stepper motor applications.
These alternatives vary slightly in features, power ratings, and package types, so specifications should be compared to ensure compatibility with your application.

Features

The A3977SLPTR-T is a stepper motor driver IC from Allegro MicroSystems. It is designed to control bipolar stepper motors in full, half, quarter, and eighth-step modes. Key features include:
1. Microstepping: Supports up to eighth-step microstepping for smooth motor operation.
2. Current Control: Features a built-in PWM current control mechanism allowing precise control over motor current.
3. Low RDS(on): Low on-resistance for enhanced efficiency and reduced power loss.
4. Mixed Decay Modes: Offers mixed decay modes to optimize motor performance.
5. Internal PWM: Eliminates the need for external components for PWM control.
6. Overcurrent Protection: Safeguards the IC against overcurrent conditions.
7. Thermal Shutdown: Protects the device from overheating.
8. Crossover-Current Protection: Prevents simultaneous conduction of high-side and low-side drivers.
9. Compact Package: Available in a compact surface-mount package suitable for space-constrained applications.
These features make the A3977SLPTR-T well-suited for a variety of applications requiring precise stepper motor control, such as in printers, scanners, and other automation equipment.

Pinout

The A3977SLPTR-T is a microstepping motor driver with 28 pins, designed to drive bipolar stepper motors. It features built-in microstepping control for precise motor control and reduces the need for external components. The device is capable of full, half, quarter, and eighth-step modes, allowing for smooth and accurate motor operation. Key functions of the A3977SLPTR-T include current control, thermal shutdown, crossover current protection, and undervoltage lockout. It operates at a supply voltage range of 8V to 35V and can deliver up to 2.5A output current per phase. The package type for this device is a 28-lead TSSOP (Thin Shrink Small Outline Package) with an exposed thermal pad to enhance heat dissipation.

Manufacturer

The A3977SLPTR-T is manufactured by Allegro MicroSystems. Allegro MicroSystems is a company that specializes in developing and manufacturing high-performance power and sensing semiconductor solutions. Their products include integrated circuits used in a variety of applications such as automotive systems, industrial systems, and consumer electronics. Allegro is known for its expertise in magnetic sensor ICs and power ICs, catering to the needs of industries that require precise control and efficient management of power and motion. This company focuses on innovation and quality, offering solutions that enhance electronics performance and reliability.

Application

The A3977SLPTR-T is a microstepping motor driver IC commonly used in applications requiring precise motor control. Key application areas include 3D printers, CNC machines, and robotics, where it enables smooth and accurate control of stepper motors. It is also used in industrial automation, surveillance cameras, and other systems requiring precise positioning and speed control. The IC’s ability to provide microstepping improves motion accuracy and minimizes noise, making it suitable for applications demanding fine control over motor movements.

Package

The A3977SLPTR-T is a microstepping motor driver IC by Allegro Microsystems. Its package type is a TSSOP (Thin Shrink Small Outline Package) with exposed thermal pad, specifically a 28-lead TSSOP.

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