Choosing the right motor driver can make or break your project. The electronics market offers dozens of options, each suited to different motor types and current requirements. This comprehensive comparison covers the four most popular motor drivers used in Arduino projects — L298N, L293D, TB6612FNG, and DRV8825 — helping you pick the right one for your specific application.
Quick Comparison Overview
| Feature | L293D | L298N | TB6612FNG | DRV8825 |
|---|---|---|---|---|
| Type | DC/Stepper | DC/Stepper | DC/Stepper | Stepper only |
| Channels | 2 | 2 | 2 | 1 (bipolar) |
| Continuous Current | 600mA | 2A | 1.2A | 1.5A (2.5A max) |
| Peak Current | 1.2A | 3A | 3.2A | 2.5A |
| Voltage Drop | 1.4-2.8V | 1.4-3V | ~0.5V | Low (MOSFET) |
| Motor Voltage | 4.5-36V | 5-35V | 2.5-13.5V | 8.2-45V |
| Microstepping | No | No | No | Up to 1/32 |
| Efficiency | Low | Low | High | High |
| Price (India) | ₹30-60 | ₹80-150 | ₹100-200 | ₹60-120 |
L293D: The Lightweight Champion
The L293D is a quad half-H-bridge driver IC that can drive two DC motors or one stepper motor at up to 600mA per channel. It includes built-in flyback diodes for motor back-EMF protection.
Best for: Small BO motors, mini robots, IoT motor projects where current is under 500mA.
Avoid when: Motors draw more than 600mA, or efficiency matters (battery-powered projects).
L298N: The Workhorse
The L298N handles up to 2A continuous per channel and comes as a ready-made module with screw terminals, heatsink, and an onboard 5V regulator. It is the most commonly used motor driver in Arduino robotics.
Best for: General robotics, robot cars, medium-size projects, learning.
Avoid when: Battery life is critical (high voltage drop wastes energy) or you need more than 2A.
TB6612FNG: The Efficient Choice
The TB6612FNG from Toshiba uses MOSFET output stages instead of bipolar transistors, resulting in a dramatically lower voltage drop (~0.5V vs 1.4-3V for L298N). This means higher efficiency and less wasted heat.
Best for: Battery-powered robots, compact builds, projects where efficiency matters.
Avoid when: Motors draw more than 1.2A continuous, or you need a higher motor voltage than 13.5V.
DRV8825: The Stepper Specialist
The DRV8825 is dedicated to bipolar stepper motor control. It provides step/direction interface, adjustable current limiting, and up to 1/32 microstepping — making it ideal for 3D printers, CNC machines, and any precision stepper application.
Best for: NEMA 17 stepper motors, 3D printers, CNC, precision positioning.
Avoid when: You need to drive DC motors (use L298N or TB6612 instead).
Honourable Mentions
- BTS7960 (43A): For high-power motors — sumo robots, e-bike controllers, winch motors. Single channel but handles massive current.
- DRV8833: Dual H-bridge MOSFET driver, 1.5A per channel. Compact and efficient for small robots.
- MX1508: Ultra-cheap dual H-bridge for basic projects. Works but lacks current capacity.
- Cytron MD10C (13A): Single-channel 13A driver with excellent documentation. Great for medium-power motors.
- A4988: The classic stepper driver. 2A max, 1/16 microstepping. Slightly less capable than DRV8825 but perfectly adequate for most builds.
Decision Guide
Ask these questions to choose your driver:
- What motor type? DC motor → L298N/TB6612/L293D. Stepper → A4988/DRV8825.
- How much current? Under 600mA → L293D. Under 1.2A → TB6612FNG. Under 2A → L298N. Over 2A → BTS7960 or Cytron.
- Battery powered? Yes → TB6612FNG (efficiency). No → L298N (simpler).
- How many motors? 1-2 DC motors → single driver. 4 motors → two L298N or two TB6612.
- Need microstepping? Yes → DRV8825 (1/32) or A4988 (1/16). No → L298N for steppers.
Frequently Asked Questions
Can I mix different motor drivers in one project?
Yes. Many projects use an A4988 for stepper motors and an L298N for DC motors on the same Arduino. Just ensure all drivers share a common ground with the Arduino.
Why is TB6612FNG better than L298N for battery projects?
The L298N drops 1.4-3V across its BJT transistors, wasting energy as heat. The TB6612FNG’s MOSFET output drops only ~0.5V. On a 7.4V battery, that is 20-40% less wasted energy — significant for battery life.
Do I need heatsinks on these drivers?
L298N: The module comes with a heatsink. Adequate for most uses. A4988/DRV8825: Add the included heatsink — they run hot at higher currents. TB6612FNG: Rarely needs a heatsink due to low losses. BTS7960: Has built-in heatsink, add a fan for sustained high current.
Can I use a motor driver with motors rated higher than the driver’s voltage?
No. The driver’s voltage rating is the maximum it can handle. Using higher voltage will destroy the driver IC. Always match or exceed the motor voltage within the driver’s rated range.
Conclusion
There is no single “best” motor driver — only the best driver for your specific application. The L298N remains the default for learning and general robotics, the TB6612FNG excels in battery-powered builds, the DRV8825 dominates stepper motor control, and the BTS7960 handles high-power applications. Understanding the trade-offs helps you make the right choice every time.
Compare and buy all motor drivers at Zbotic.in.
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