DRV8825 Stepper Motor Driver Module with Aluminum Heat Sink – High-Current Carrier

Specification	Details
Operating Voltage (VMOT)	8.2V to 45V DC
Logic Voltage (VDD)	3V to 5.5V DC
Continuous Current	1.5A per phase (up to 2.2A with cooling)
Microstep Resolutions	Full, 1/2, 1/4, 1/8, 1/16, 1/32
Protection	Over-current, Thermal, Under-voltage, Short-to-ground

Price

₹ 110.17

(Tax included)

Barcode: 2829800

Product Description

The DRV8825 Stepper Motor Driver is a powerful upgrade to the standard A4988, designed for precision control of bipolar stepper motors in high-demand applications like 3D printers, CNC machines, and heavy-duty robotics. Capable of operating at up to 45V, this driver allows for significantly higher torque at high speeds compared to lower-voltage alternatives. It features a sophisticated 4-layer PCB for improved thermal dissipation and supports ultra-fine 1/32 microstepping, which results in much smoother and quieter motor operation. The module includes a dedicated aluminum heatsink and an adjustable current limit trimpot, allowing users to fine-tune the power delivery to match their specific motor requirements.

Key Features

Enhanced Microstepping: Supports 1/32-step mode, providing double the resolution of the A4988 for near-silent motion and high-precision positioning.
High Voltage Headroom: Rated for up to 45V, making it ideal for systems where long cable runs or high-speed rotations cause back-EMF spikes.
Onboard Current Regulation: Features a potentiometer to set the maximum output current, protecting your stepper motors from overheating during long print or mill cycles.
Four-Layer PCB Construction: Engineered with a specialized 4-layer board that uses large copper planes to draw heat away from the IC more efficiently than standard 2-layer boards.
Simple Interface: Uses the standard STEP/DIR protocol, making it a drop-in replacement for A4988 modules on most CNC shields and 3D printer motherboards.

Technical Details

Microstep Selection: Pins M0, M1, and M2 control the step resolution.
Fault Output: Includes a FAULT pin that goes low if the driver detects an over-current or over-temperature event.
Heatsink: Includes an adhesive-backed aluminum finned heatsink.

Prototyping and Engineering Tips from Robogears

The "Orientation Warning": CRITICAL: The DRV8825 is often pinned differently than the A4988. When replacing an A4988 on a RAMPS or CNC shield, the DRV8825 usually faces the opposite direction (check the GND and VMOT labels on the board). Plugging it in backward will instantly destroy the driver and potentially your controller.
Vref Calculation: To set the current limit (Ilimit), measure the voltage (Vref) at the trimpot. For the DRV8825, the formula is generally Ilimit=Vref×2. For a 1.5A motor, you would set your Vref to 0.75V.
Managing High Heat: While the DRV8825 can handle up to 2.2A, it will enter thermal shutdown quickly without active cooling at those levels. Always mount the provided heatsink on the IC (ensure it doesn't touch the pins) and use a cooling fan for any application drawing more than 1.2A.
Decoupling is Mandatory: Always place a large electrolytic capacitor (100uF or higher) across VMOT and GND as close to the driver as possible to absorb high-voltage transients that occur during motor stepping.
Smooth 1/32 Stepping: If your motor "sings" or vibrates at 1/32 stepping, check your Vref. Often, increasing the current slightly provides enough holding torque to smooth out the micro-transitions between steps.

Package Includes

1 x DRV8825 Stepper Motor Driver Module
1 x Aluminum Heatsink with Adhesive Backing

Disclaimer: Never connect or disconnect the motor while the driver is powered; this will result in permanent damage to the IC. Ensure your power supply voltage does not exceed 45V DC. Proper calibration of the current limit is required before first use to prevent motor damage.

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