Pololu MAX14870 Single Brushed DC Motor Driver Carrier
Pololu MAX14870 Single Brushed DC Motor Driver Carrier
Pololu MAX14870 Single Brushed DC Motor Driver Carrier
The Pololu MAX14870 is a compact single brushed DC motor driver carrier based on the Maxim Integrated MAX14870 motor driver IC, capable of delivering up to 3.6A continuous current at 5V to 36V supply voltage. Professional roboticists, automation engineers, and embedded systems developers rely on this carrier for precise motor control in applications ranging from autonomous vehicles to industrial equipment requiring bidirectional motor operation. This driver solves the critical challenge of interfacing microcontroller logic signals with high-current DC motors while providing integrated protection features including thermal shutdown and current limiting.
Product Overview
The MAX14870 motor driver operates on the principle of H-bridge topology, allowing bidirectional control of brushed DC motors through simple logic-level PWM signals. The integrated MAX14870 IC features low on-resistance MOSFETs that minimize power dissipation, making it ideal for battery-powered applications. The carrier board breaks out all necessary connections including motor outputs, logic inputs, power supply pins, and ground references, with a compact form factor suitable for integration into space-constrained designs. The device supports both locked-antiphase and sign-magnitude PWM control modes, providing flexibility for different microcontroller implementations.
What distinguishes the MAX14870 from competing solutions is its integrated current sensing capability and thermal management features. The driver includes an internal current-limiting circuit that protects against stall conditions and short circuits, while the thermal shutdown mechanism prevents damage from sustained overcurrent scenarios. With a maximum supply voltage of 36V and continuous current rating of 3.6A, this carrier accommodates a wide range of motor sizes and applications. The low gate drive voltage requirement and efficient switching characteristics make it suitable for both 5V logic systems and 3.3V microcontroller platforms with appropriate signal conditioning.
Key Specifications
| Specification | Details |
| Product Type | Single Brushed DC Motor Driver Carrier |
| Brand | Pololu |
| Origin | Original/Authentic |
| Warranty | 7 days on manufacturing defects |
| Shipping | 1-5 days from Bengaluru |
| Delivery | 7-8 days across India |
| Support | 24/7 via Email and WhatsApp |
| Motor Driver IC | Maxim Integrated MAX14870 |
| Supply Voltage Range | 5V to 36V DC |
| Continuous Current Rating | 3.6A at 5V supply |
| Peak Current Rating | 5A (with thermal protection) |
| Control Interface | Logic-level PWM inputs (5V or 3.3V compatible) |
| Protection Features | Thermal shutdown, current limiting, reverse polarity protection |
| Board Dimensions | Compact carrier format optimized for breadboard integration |
Key Features
- Bidirectional Motor Control: Full H-bridge configuration enables forward and reverse rotation with PWM speed control from 0-100 percent
- Wide Supply Voltage Range: Operates from 5V to 36V, accommodating various power supply configurations and motor types
- Integrated Current Limiting: Built-in protection circuit prevents damage from motor stall conditions and accidental short circuits
- Thermal Management: Automatic thermal shutdown at approximately 165 degrees Celsius protects the IC during sustained overcurrent scenarios
- Logic-Level Compatible: Accepts standard 5V and 3.3V logic signals from microcontrollers without additional level shifting
- Dual PWM Control Modes: Supports both locked-antiphase and sign-magnitude PWM control for flexible implementation
- Minimal External Components: Pre-assembled carrier requires only motor connections and power supply, reducing design complexity
- Breadboard-Friendly Pinout: Standard 0.1-inch header spacing enables rapid prototyping and integration into development platforms
Applications and Use Cases
- Autonomous Mobile Robots: Drive differential-drive robot platforms with precise speed and direction control using microcontroller PWM outputs
- Robotics Competition Projects: Power competition robots requiring reliable bidirectional motor control within weight and size constraints
- Industrial Automation Equipment: Control conveyor belts, actuators, and machinery requiring variable speed DC motor operation
- Hobby Electronics Projects: Build custom motorized mechanisms including 3D printer extruders, pan-tilt camera mounts, and automated systems
- Educational Robotics Platforms: Teach motor control principles using Arduino, Raspberry Pi, and other microcontroller platforms
- Vehicle Applications: Drive wheelchair motors, electric scooter controllers, and other battery-powered transportation systems
- Laboratory Test Equipment: Control specimen rotation, sample agitation, and other motorized laboratory apparatus with programmable speed profiles
How to Use
To implement the Pololu MAX14870 motor driver, connect your power supply positive terminal to the VCC pin and ground to GND, ensuring the supply voltage matches your motor requirements between 5V and 36V. Connect your brushed DC motor leads to the OUT1 and OUT2 terminals, observing correct polarity for desired rotation direction. Wire your microcontroller PWM outputs to the IN1 and IN2 logic input pins, configuring your firmware to generate PWM signals at 20kHz or higher for smooth motor operation. The IN1 and IN2 pins control motor direction through logic levels: setting both pins high or both low disables the motor, while opposite logic levels drive the motor forward or reverse with speed proportional to PWM duty cycle.
For optimal performance, implement software-based current monitoring by reading the FAULT pin output, which indicates thermal shutdown or overcurrent conditions. Ensure adequate power supply capacity to handle peak current draw during motor acceleration phases. If using 3.3V logic microcontrollers, verify input voltage levels meet the MAX14870 minimum threshold specifications, typically around 1.5V for logic high. Place a 0.1 microfarad ceramic capacitor across VCC and GND near the driver carrier to suppress power supply noise and improve signal integrity during rapid PWM switching transitions.
Frequently Asked Questions
What is the maximum continuous current this motor driver can supply?
The Pololu MAX14870 is rated for 3.6A continuous current at 5V supply voltage. At higher supply voltages up to 36V, the continuous current rating may be slightly lower due to thermal considerations. Peak current can reach 5A for short durations before thermal shutdown protection activates. For applications requiring sustained currents above 3.6A, consider parallel configurations or higher-rated driver alternatives.
Can I control the motor speed with this driver?
Yes, the MAX14870 supports PWM speed control by varying the duty cycle of the logic input signals. Apply a PWM signal to IN1 and IN2 pins at frequencies above 20kHz for smooth operation. The motor speed is directly proportional to the PWM duty cycle, allowing fine-grained speed control from 0 to 100 percent. Most microcontroller platforms including Arduino and Raspberry Pi can generate suitable PWM signals using built-in timer modules.
What happens if the motor stalls or draws excessive current?
The integrated current limiting circuit within the MAX14870 IC activates automatically when motor current exceeds safe thresholds, typically around 5A. If overcurrent persists, the thermal shutdown feature engages at approximately 165 degrees Celsius, disabling the driver until temperature decreases. This dual-layer protection prevents permanent damage to the IC and connected motor. Monitor the FAULT pin in your firmware to detect these conditions and implement appropriate error handling.
Is this driver compatible with 3.3V microcontrollers?
Yes, the MAX14870 accepts 3.3V logic input signals on the IN1 and IN2 pins, making it compatible with Arduino Due, Raspberry Pi, ARM Cortex-M microcontrollers, and other 3.3V platforms. However, verify that your specific microcontroller outputs meet the minimum logic high voltage threshold of approximately 1.5V. If marginal, add a simple buffer circuit or use pull-up resistors to ensure reliable signal detection.
When will I receive my order?
Orders are dispatched within 1-5 business days from our Bengaluru warehouse. Delivery takes 7-8 days to most locations across India.
What is your return and warranty policy?
We offer a 7-day return policy on manufacturing defects only. Contact support within 7 days of receipt for free replacement or full refund. Not applicable for user damage or misuse.
Are bulk discounts available?
Yes, wholesale pricing for orders of 10 or more units. Contact our sales team via WhatsApp or email for a customized bulk quote.
Why Buy from The Tech Depot
- Genuine Products: Sourced directly from authorized distributors with authentication
- Expert Team: Our technical team validates every product before listing
- Fast Shipping: Dispatched within 1-5 days from our Bengaluru warehouse
- Pan-India Delivery: 7-8 days to Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata
- Payment Options: COD, UPI, credit/debit cards, net banking, EMI available
- Technical Support: 24/7 expert guidance via email and WhatsApp
- Returns: 7-day return policy on manufacturing defects only
Buy Pololu MAX14870 Single Brushed DC Motor Driver Carrier Online in India
Purchase the Pololu MAX14870 Single Brushed DC Motor Driver Carrier online at The Tech Depot, India's trusted source for genuine electronics. We deliver across Bengaluru, Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata, Ahmedabad, Jaipur, and Surat. Get the best price on Pololu MAX14870 Single Brushed DC Motor Driver Carrier with fast shipping and expert support.
Our team in Bengaluru is available 24/7 to support your journey from product selection to project completion.