A3979SLPTR-T

Product Overview

Category

A3979SLPTR-T belongs to the category of integrated circuits (ICs).

Use

This IC is commonly used in motor control applications.

Characteristics

• Package: A3979SLPTR-T is available in a surface mount package.
• Essence: It is a high-performance stepper motor driver.
• Packaging/Quantity: The IC is typically sold in reels or tubes, with varying quantities depending on the supplier.

Specifications

The specifications of A3979SLPTR-T include:

• Supply Voltage Range: 3.0V to 5.5V
• Output Current: Up to 3.5A per phase
• Step Modes: Full, Half, Quarter, Eighth, and Sixteenth
• Protection Features: Thermal shutdown, overcurrent detection, and undervoltage lockout

Detailed Pin Configuration

The pin configuration of A3979SLPTR-T is as follows:

1. VREF - Reference voltage input for current control
2. GND - Ground connection
3. CP1 - Charge pump capacitor 1
4. CP2 - Charge pump capacitor 2
5. CP3 - Charge pump capacitor 3
6. CP4 - Charge pump capacitor 4
7. VCP - Charge pump supply voltage
8. VDD - Logic supply voltage
9. RESET - Reset input
10. MS1 - Microstep resolution selection input 1
11. MS2 - Microstep resolution selection input 2
12. ENABLE - Enable input
13. STEP - Step input
14. DIR - Direction input
15. OUT1 - Motor coil output 1
16. OUT2 - Motor coil output 2
17. OUT3 - Motor coil output 3
18. OUT4 - Motor coil output 4

Functional Features

The A3979SLPTR-T offers the following functional features:

• Microstepping: It supports various microstep resolutions, allowing precise control of stepper motors.
• Current Control: The IC provides adjustable current control to optimize motor performance and reduce power consumption.
• Protection Mechanisms: It incorporates thermal shutdown, overcurrent detection, and undervoltage lockout for enhanced safety and reliability.
• Direction and Step Control: The DIR and STEP inputs enable easy control of motor direction and step size.

Advantages and Disadvantages

Advantages: - High-performance motor control - Adjustable current control for optimized performance - Microstepping capability for smooth motion - Integrated protection features for enhanced safety

Disadvantages: - Limited supply voltage range (3.0V to 5.5V) - Requires external charge pump capacitors for proper operation

Working Principles

A3979SLPTR-T operates by receiving control signals through its input pins, such as DIR, STEP, ENABLE, and MS1/MS2. These signals determine the motor's direction, step size, and microstepping resolution. The IC then generates the appropriate output signals to drive the motor coils, resulting in precise control of the stepper motor.

Detailed Application Field Plans

The A3979SLPTR-T is widely used in various applications that require precise control of stepper motors. Some common application fields include:

1. Robotics: The IC is utilized in robotic systems for accurate positioning and movement control.
2. CNC Machines: It finds application in computer numerical control (CNC) machines to control the movement of axes.
3. 3D Printers: A3979SLPTR-T is employed in 3D printers to control the movement of print heads and build platforms.
4. Automated Equipment: It is used in automated equipment and machinery for precise motion control.

Detailed and Complete Alternative Models

Some alternative models to A3979SLPTR-T that offer similar functionality are:

1. DRV8825: This IC provides microstepping control and adjustable current limiting for stepper motor applications.
2. TB6600: It is a versatile stepper motor driver with various step resolutions and current control features.
3. L298N: This dual H-bridge motor driver can also be used to drive stepper motors with limited microstepping capabilities.

These alternative models can be considered based on specific application requirements and compatibility with the system design.

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