SN75471DR

Product Overview

• Category: Integrated Circuit (IC)
• Use: Motor Driver
• Characteristics: High voltage, high current, and high-performance driver
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: Provides bidirectional control for two DC motors or one stepper motor
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 4.5V to 36V
• Output Current: Up to 1A per channel
• Peak Output Current: Up to 2A per channel
• Number of Channels: 2
• Logic Input Voltage Range: 2V to 7V
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The SN75471DR has a total of 16 pins, which are divided into four groups:

1. Power Supply Pins:

   • VCC1 (Pin 16): Positive supply voltage for the logic circuitry (4.5V to 7V).
   • VCC2 (Pin 8): Positive supply voltage for the motor (4.5V to 36V).
   • GND (Pins 4, 5, 12, 13): Ground reference for both logic and motor circuits.

2. Control Pins:

   • Input 1 (Pin 2): Logic input for controlling the direction of Motor 1.
   • Enable 1 (Pin 1): Logic input to enable/disable Motor 1.
   • Input 2 (Pin 7): Logic input for controlling the direction of Motor 2.
   • Enable 2 (Pin 9): Logic input to enable/disable Motor 2.

3. Motor Output Pins:

   • Output 1 (Pin 3): Output terminal for Motor 1.
   • Output 2 (Pin 6): Output terminal for Motor 1.
   • Output 3 (Pin 11): Output terminal for Motor 2.
   • Output 4 (Pin 14): Output terminal for Motor 2.

4. Protection Diode Pins:

   • VCC2 (Pin 10): Positive supply voltage for the motor (4.5V to 36V).
   • GND (Pin 15): Ground reference for the motor circuit.

Functional Features

• Bidirectional Control: Allows control of the direction of rotation for two DC motors or one stepper motor.
• High Voltage and Current Handling: Can handle high voltages up to 36V and currents up to 2A per channel.
• Thermal Shutdown Protection: Automatically shuts down the device if the temperature exceeds the safe operating limit.
• Overcurrent Protection: Protects the motor and driver from excessive current by limiting the output current.
• Enable/Disable Functionality: Enables or disables the motor outputs to conserve power when not in use.

Advantages and Disadvantages

Advantages: - High voltage and current handling capability - Bidirectional control for versatile motor applications - Built-in protection features for enhanced reliability - Compact SOIC package for space-constrained designs

Disadvantages: - Limited number of channels (2) - Requires external components for full motor control functionality

Working Principles

The SN75471DR is a motor driver IC that utilizes H-bridge configuration to control the direction and speed of DC motors or stepper motors. It consists of four power MOSFETs arranged in an H-bridge configuration, allowing bidirectional current flow through the motor windings. By controlling the logic inputs, the motor can be driven forward, reverse, or stopped.

The enable pins (Enable 1 and Enable 2) are used to enable or disable the motor outputs, while the input pins (Input 1 and Input 2) control the direction of rotation. The motor outputs (Output 1, Output 2, Output 3, and Output 4) are connected to the motor windings.

Detailed Application Field Plans

The SN75471DR is widely used in various applications that require precise control of DC motors or stepper motors. Some common application fields include:

1. Robotics: Used in robotic systems for controlling the movement of robot arms, wheels, and other motorized components.
2. Industrial Automation: Employed in automated machinery and equipment for precise positioning, conveyor belt control, and motorized actuators.
3. Automotive: Integrated into automotive systems for controlling window regulators, seat adjustments, and motorized mirrors.
4. Home Appliances: Found in appliances like washing machines, vacuum cleaners, and air conditioning units for motor control.
5. DIY Electronics: Utilized by hobbyists and electronics enthusiasts for building projects involving motor control, such as remote-controlled vehicles and drones.

Detailed and Complete Alternative Models

1. L293D: Similar motor driver IC with similar functionality but lower voltage and current ratings.
2. DRV8833