DRV8821DCAR

Product Overview

Category: Integrated Circuit (IC)

Use: Motor Driver

Characteristics: - High current capability - Microstepping capability - Low power consumption - Thermal shutdown protection - Overcurrent protection - Under-voltage lockout protection

Package: Dual Flat No-Lead (DFN)

Essence: The DRV8821DCAR is a motor driver IC designed to control the movement of stepper motors. It provides high current capability and microstepping capability, making it suitable for various applications that require precise motor control.

Packaging/Quantity: The DRV8821DCAR is available in a DFN package. It is typically sold in reels or tubes containing multiple units.

Specifications

• Operating Voltage: 8.2V to 45V
• Output Current: Up to 2.5A per phase
• Microstepping Resolution: Up to 1/32 step
• Logic Voltage: 3.3V or 5V
• Operating Temperature Range: -40°C to 85°C

Detailed Pin Configuration

The DRV8821DCAR has the following pin configuration:

1. VREF: Reference voltage for motor current regulation
2. VM: Motor supply voltage
3. GND: Ground
4. STEP: Step input for controlling motor movement
5. DIR: Direction input for controlling motor rotation direction
6. MODE0, MODE1: Microstepping mode selection inputs
7. RESET: Reset input for disabling the motor driver
8. FAULT: Fault output indicating overcurrent or thermal shutdown

Functional Features

• High current capability allows driving motors with higher torque requirements.
• Microstepping capability enables smoother and more precise motor movements.
• Low power consumption ensures efficient operation and reduces energy consumption.
• Thermal shutdown protection prevents the IC from overheating.
• Overcurrent protection safeguards the motor and driver from excessive current.
• Under-voltage lockout protection ensures proper operation even at low supply voltages.

Advantages and Disadvantages

Advantages: - High current capability for driving motors with higher torque requirements. - Microstepping capability allows for smoother and more precise motor movements. - Thermal shutdown and overcurrent protection ensure the safety of the motor and driver. - Low power consumption reduces energy consumption and heat generation.

Disadvantages: - Limited to a maximum microstepping resolution of 1/32 step. - Requires external logic voltage supply (3.3V or 5V).

Working Principles

The DRV8821DCAR operates by receiving control signals through the STEP and DIR inputs. The STEP signal determines the step size, while the DIR signal controls the direction of rotation. The microstepping mode can be selected using the MODE0 and MODE1 inputs, allowing for finer motor position control. The IC regulates the motor current based on the reference voltage (VREF) provided.

Detailed Application Field Plans

The DRV8821DCAR is commonly used in various applications that require precise motor control, such as:

1. 3D printers
2. CNC machines
3. Robotics
4. Automated equipment
5. Industrial automation systems

Detailed and Complete Alternative Models

1. A4988: Similar motor driver IC with lower current capability but widely used in hobbyist projects.
2. TMC2209: Advanced motor driver IC with higher microstepping resolution and additional features like sensorless homing.

These alternative models offer different specifications and features, providing options for various motor control requirements.

In conclusion, the DRV8821DCAR is a high-performance motor driver IC suitable for applications that demand precise motor control. With its high current capability, microstepping capability, and built-in protection features, it offers reliable and efficient motor control solutions.