How to Use Tb6612Fng Doble Puente H: Examples, Pinouts, and Specs

The TB6612FNG is a dual H-bridge motor driver IC manufactured by Genérico. It is designed to control two DC motors or one stepper motor with high efficiency and precision. This component is widely used in robotics, automation, and other motor control applications due to its compact size, ease of use, and robust features.

• Robotics (e.g., controlling wheels or arms)
• Automated conveyor systems
• Remote-controlled vehicles
• Stepper motor control for 3D printers or CNC machines
• DIY electronics projects involving motorized components

The TB6612FNG offers the following key technical details:

The TB6612FNG has 20 pins, with the following configuration:

1. Power Connections:

   • Connect the VM pin to the motor power supply (2.5V to 13.5V).
   • Connect the VCC pin to the logic power supply (2.7V to 5.5V).
   • Connect the GND pin to the ground of the circuit.

2. Motor Connections:

   • Connect the motor terminals to the A01 and A02 pins for Motor A, and B01 and B02 pins for Motor B.

3. Control Signals:

   • Use the AIN1, AIN2, and PWMA pins to control Motor A.
   • Use the BIN1, BIN2, and PWMB pins to control Motor B.
   • Apply a PWM signal to the PWMA and PWMB pins to regulate motor speed.
   • Set the STBY pin HIGH to enable the IC.

4. Logic Levels:

   • The control pins (AIN1, AIN2, BIN1, BIN2, PWMA, PWMB, and STBY) operate at logic levels compatible with the VCC voltage.

Below is an example of how to control two DC motors using the TB6612FNG and an Arduino UNO:

// Pin definitions for Motor A
const int AIN1 = 7;  // Control pin 1 for Motor A
const int AIN2 = 8;  // Control pin 2 for Motor A
const int PWMA = 9;  // PWM pin for Motor A

// Pin definitions for Motor B
const int BIN1 = 10; // Control pin 1 for Motor B
const int BIN2 = 11; // Control pin 2 for Motor B
const int PWMB = 6;  // PWM pin for Motor B

// Standby pin
const int STBY = 12; // Standby control pin

void setup() {
  // Set control pins as outputs
  pinMode(AIN1, OUTPUT);
  pinMode(AIN2, OUTPUT);
  pinMode(PWMA, OUTPUT);
  pinMode(BIN1, OUTPUT);
  pinMode(BIN2, OUTPUT);
  pinMode(PWMB, OUTPUT);
  pinMode(STBY, OUTPUT);

  // Enable the motor driver by setting STBY HIGH
  digitalWrite(STBY, HIGH);
}

void loop() {
  // Example: Drive Motor A forward at 50% speed
  digitalWrite(AIN1, HIGH);
  digitalWrite(AIN2, LOW);
  analogWrite(PWMA, 128); // 50% duty cycle (128 out of 255)

  // Example: Drive Motor B backward at 75% speed
  digitalWrite(BIN1, LOW);
  digitalWrite(BIN2, HIGH);
  analogWrite(PWMB, 192); // 75% duty cycle (192 out of 255)

  delay(2000); // Run motors for 2 seconds

  // Stop both motors
  analogWrite(PWMA, 0);
  analogWrite(PWMB, 0);

  delay(2000); // Wait for 2 seconds before repeating
}

• Ensure that the motor power supply (VM) matches the voltage requirements of your motors.
• Use appropriate decoupling capacitors near the VM and VCC pins to reduce noise.
• Avoid exceeding the maximum current ratings to prevent damage to the IC.
• Always set the STBY pin HIGH to enable the motor driver.

1. Motors Not Running:

   • Ensure the STBY pin is set HIGH.
   • Verify that the control signals (AIN1, AIN2, BIN1, BIN2) are correctly configured.
   • Check the power supply connections for VM and VCC.

2. Motor Speed Not Changing:

   • Confirm that a valid PWM signal is being applied to the PWMA and PWMB pins.
   • Check the duty cycle of the PWM signal to ensure it is within the expected range.

3. Overheating:

   • Ensure the current drawn by the motors does not exceed the IC's maximum ratings.
   • Add a heatsink or improve ventilation if necessary.

4. No Output Voltage:

   • Verify that the input logic levels match the VCC voltage.
   • Check for any short circuits or incorrect wiring.

Q: Can the TB6612FNG drive stepper motors?
A: Yes, the TB6612FNG can drive a bipolar stepper motor by controlling the two H-bridges with appropriate step sequences.

Q: What happens if the IC overheats?
A: The TB6612FNG has a built-in thermal shutdown feature that disables the outputs to protect the IC from damage.

Q: Can I use the TB6612FNG with a 3.3V microcontroller?
A: Yes, the TB6612FNG is compatible with 3.3V logic levels as long as the VCC pin is powered within the 2.7V to 5.5V range.