A3984SLPTR

Product Overview

Category

A3984SLPTR belongs to the category of integrated circuits (ICs).

Use

This IC is primarily used for motor control applications.

Characteristics

• Package: A3984SLPTR comes in a small outline package (SOP) with thermal pad.
• Essence: It is a high-performance stepper motor driver.
• Packaging/Quantity: The IC is typically sold in reels, with a quantity of 2500 units per reel.

Specifications

The specifications of A3984SLPTR are as follows:

• Supply Voltage Range: 7V to 35V
• Output Current: Up to 2.5A per phase
• Step Modes: Full, Half, Quarter, Eighth, and Sixteenth
• Internal PWM Current Control
• Thermal Shutdown Circuitry
• Low RDS(ON) Outputs
• Built-in Translator
• Fault Diagnostics

Detailed Pin Configuration

The pin configuration of A3984SLPTR is as follows:

1. VCP - Charge Pump Capacitor Input
2. CP1 - Charge Pump Capacitor Connection
3. CP2 - Charge Pump Capacitor Connection
4. GND - Ground
5. VBB - High-Side Bootstrap Supply Voltage
6. VCC - Logic Supply Voltage
7. VDD - High-Side Power Supply Voltage
8. OUT1 - Phase 1 Output
9. OUT2 - Phase 2 Output
10. OUT3 - Phase 3 Output
11. OUT4 - Phase 4 Output
12. REF - Reference Voltage
13. SLEEP - Sleep Mode Input
14. ENABLE - Enable Input
15. MS1 - Microstep Resolution Selection Input 1
16. MS2 - Microstep Resolution Selection Input 2
17. RESET - Reset Input
18. STEP - Step Input
19. DIR - Direction Input
20. VCP - Charge Pump Capacitor Input

Functional Features

The A3984SLPTR offers the following functional features:

• Microstepping: It supports various microstep resolutions, allowing precise control of stepper motors.
• Fault Diagnostics: The IC includes built-in fault diagnostics to detect and report any issues during operation.
• Thermal Shutdown Circuitry: This feature protects the IC from overheating by shutting down the device when the temperature exceeds a certain threshold.
• PWM Current Control: The internal pulse-width modulation (PWM) current control ensures accurate and efficient motor control.

Advantages and Disadvantages

Advantages: - High-performance stepper motor driver - Wide supply voltage range - Multiple step modes for flexible motor control - Built-in fault diagnostics for easy troubleshooting

Disadvantages: - Limited output current (up to 2.5A per phase) - Requires external charge pump capacitor for optimal performance

Working Principles

The A3984SLPTR operates by receiving control signals through inputs such as STEP, DIR, ENABLE, and microstep resolution selection pins (MS1, MS2). These signals determine the direction, speed, and microstepping mode of the connected stepper motor. The IC internally generates the necessary PWM signals to control the motor's current, ensuring smooth and precise movement.

Detailed Application Field Plans

The A3984SLPTR is commonly used in various applications that require precise control of stepper motors. Some of the application fields where this IC finds utility include:

1. Robotics: The IC enables accurate positioning and movement control in robotic systems.
2. CNC Machines: It provides precise control over the movement of axes in computer numerical control (CNC) machines.
3. 3D Printers: The A3984SLPTR ensures precise control of the stepper motors responsible for moving the print head and build platform in 3D printers.
4. Automated Equipment: It is used in automated equipment for precise positioning and control of mechanical components.

Detailed and Complete Alternative Models

Some alternative models to A3984SLPTR that offer similar functionality are:

1. DRV8825: This IC provides high-resolution microstepping and supports up to 2.5A output current per phase.
2. TB6600: It offers a wide range of microstep resolutions and can handle higher output currents (up to 4.5A).
3. L298N: This dual H-bridge motor driver IC can be used for stepper motor control with lower current requirements.

These alternative models can be considered based on specific application requirements and desired features.

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