TB6612FNG Dual H-Bridge Motor Drive Board
If you are building a robot with wheels, you need a dual H-Bridge driver like this one.
is a great dual motor driver that is perfect for interfacing two small DC motors such as our micro metal gearmotors to a microcontroller, and it can also be used to control a single bipolar stepper motor. The MOSFET-based H-bridges are much more efficient than the BJT-based H-bridges used in older drivers such as the L298N and Sanyo’s LB1836M, which allows more current to be delivered to the motors and less to be drawn from the logic supply (the LB1836 still has the TB6612 beat for really low-voltage applications).
Features and specifications
- Dual-H-bridge motor driver: can drive two DC motors or one bipolar stepper motor
- Recommended motor voltage (VMOT): 4.5 V to 13.5 V (can operate down to 2.5 V with derated performance)
- Logic voltage (VCC): 2.7 V to 5.5 V
- Output current maximum: 3 A per channel
- Output current continuous: 1 A per channel (can be paralleled to deliver 2 A continuous)
- Maximum PWM frequency: 100 kHz
- Built-in thermal shutdown circuit
- Filtering capacitors on both supply lines
- Reverse-power protection on the motor supply
Real-world power dissipation considerations
The TB6612 motor driver used on the carrier board has a peak current rating of 3 A per channel. The peak ratings are for quick transients (e.g. when a motor is first turned on), and the continuous rating of 1 A is dependent on various conditions, such as the ambient temperature.
The actual current you can deliver will depend on how well you can keep the motor driver cool. The carrier’s printed circuit board is designed to draw heat out of the motor driver chip, but performance can be improved by adding a heat sink.