How to Use DRV8833: Examples, Pinouts, and Specs

The DRV8833 is a dual H-bridge motor driver designed to control the direction and speed of DC motors and stepper motors. It is a compact and efficient solution for driving motors in robotics, automation, and other motor control applications. With a supply voltage range of 2.7V to 10.8V and the ability to deliver up to 1.5A per channel, the DRV8833 is ideal for low- to medium-power motor control tasks. Its small size and versatile features make it a popular choice for hobbyists and professionals alike.

• Robotics (e.g., controlling wheels or arms)
• Automation systems
• Small conveyor belts
• Remote-controlled vehicles
• Stepper motor control for 3D printers or CNC machines

• Supply Voltage (VCC): 2.7V to 10.8V
• Output Current (per channel): Up to 1.5A (continuous)
• Peak Current (per channel): 2A (for short durations)
• Control Logic Voltage: 1.8V to 7V
• PWM Frequency: Up to 250 kHz
• Thermal Shutdown Protection: Yes
• Overcurrent Protection: Yes
• Operating Temperature Range: -40°C to 85°C
• Package Type: HTSSOP (16-pin)

The DRV8833 has 16 pins, with the following configuration:

1. Power Supply:

   • Connect the motor power supply (VM) to a voltage source between 2.7V and 10.8V.
   • Connect the logic power supply (VCC) to a voltage source between 1.8V and 7V.
   • Ensure that the ground (GND) is common for both the motor and logic power supplies.

2. Motor Connections:

   • Connect the motor terminals to the output pins (AOUT1, AOUT2 for motor A; BOUT1, BOUT2 for motor B).

3. Control Signals:

   • Use the ENABLEA and ENABLEB pins to enable or disable the respective H-bridges.
   • Use the PHASEA and PHASEB pins to control the direction of the motors.
   • Apply a PWM signal to the ENABLE pins to control motor speed.

4. Decoupling Capacitors:

   • Place a decoupling capacitor (e.g., 0.1 µF) close to the VM and VCC pins to reduce noise.

Below is an example of how to control a DC motor using the DRV8833 and an Arduino UNO.

• DRV8833 Pin ENABLEA → Arduino Pin 9 (PWM output)
• DRV8833 Pin PHASEA → Arduino Pin 8 (digital output)
• DRV8833 Pin VM → External power supply (e.g., 6V for the motor)
• DRV8833 Pin VCC → Arduino 5V
• DRV8833 Pin GND → Arduino GND and motor power supply GND
• DRV8833 Pins AOUT1, AOUT2 → Motor terminals

// DRV8833 Motor Driver Example
// Controls the speed and direction of a DC motor using Arduino

#define ENABLEA 9  // PWM pin for motor speed control
#define PHASEA 8   // Digital pin for motor direction control

void setup() {
  pinMode(ENABLEA, OUTPUT); // Set ENABLEA as output
  pinMode(PHASEA, OUTPUT);  // Set PHASEA as output
}

void loop() {
  // Rotate motor forward at 50% speed
  digitalWrite(PHASEA, HIGH); // Set direction forward
  analogWrite(ENABLEA, 128);  // Set speed (128/255 = 50%)
  delay(2000);                // Run for 2 seconds

  // Rotate motor backward at 75% speed
  digitalWrite(PHASEA, LOW);  // Set direction backward
  analogWrite(ENABLEA, 192);  // Set speed (192/255 = 75%)
  delay(2000);                // Run for 2 seconds

  // Stop the motor
  analogWrite(ENABLEA, 0);    // Set speed to 0
  delay(2000);                // Wait for 2 seconds
}

• Ensure the motor's current and voltage ratings are within the DRV8833's limits.
• Use appropriate heat dissipation methods if operating near the maximum current rating.
• Avoid shorting the output pins, as this may trigger overcurrent protection or damage the device.
• Use a common ground for the motor power supply, logic power supply, and control signals.

1. Motor Not Spinning:

   • Check the power supply connections (VM and VCC).
   • Verify that the ENABLE pins are set high.
   • Ensure the motor is properly connected to the output pins.

2. Motor Spins in the Wrong Direction:

   • Reverse the logic level on the PHASE pin for the corresponding H-bridge.

3. Motor Speed is Inconsistent:

   • Check the PWM signal for noise or instability.
   • Ensure the power supply voltage is stable and within the specified range.

4. Overheating:

   • Reduce the motor load or current draw.
   • Add a heatsink or improve ventilation around the DRV8833.

5. No Output from the Driver:

   • Verify that the logic voltage (VCC) is within the specified range.
   • Check for any short circuits or incorrect wiring.

Q: Can the DRV8833 drive stepper motors?
A: Yes, the DRV8833 can drive stepper motors by controlling both H-bridges. You will need to generate the appropriate step and direction signals.

Q: What is the maximum PWM frequency supported?
A: The DRV8833 supports PWM frequencies up to 250 kHz.

Q: Can I use the DRV8833 with a 3.3V microcontroller?
A: Yes, the DRV8833 is compatible with logic levels as low as 1.8V, making it suitable for 3.3V microcontrollers.

Q: Does the DRV8833 have built-in protection features?
A: Yes, it includes thermal shutdown, overcurrent protection, and undervoltage lockout for safe operation.