DRV8872DDARQ1

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The DRV8872DDARQ1 from Texas Instruments is a wide-voltage motor driver which offers a versatile, easy-to-use solution for all types of motor applications. It is suitable for most brushless DC (BLDC), AC induction, and stepped motors that require a wide voltage range, and can be used as a brush motor driver. The DRV8872DDARQ1 is part of TI’s DRV8700 family of motor drivers. This motor driver provides up to 8A of motor drive current and accepts a wide 7.5 V to 36 V voltage range to drive one or two DC brush motors.

Applications

The DRV8872DDARQ1 is used in automotive applications such as electric power steering and active suspension systems. It is also used in robotics, industrial automation and motion control applications such as robotic arm control, robotic vacuum cleaners and other motion control systems. It is designed for easy drive loop compensation and can be used for PID, torque and velocity control applications.

Features

The DRV8872DDARQ1 is designed for high voltage applications of up to 36 V and allows up to 8A of continuous current drive. It features a completely integrated motor driver architecture with internal gate drive, high-side and low-side MOSFETs, and integrated low Rds(ON) gate drivers with shoot-through protection. It is fully compliant with EN55032 Class B and IEC 61000-3-2 regulations. The DRV8872DDARQ1 includes several features that simplify its use in many applications like current sense, high frequency PWM, speed feedback, and protection. It also offers dynamic current regulation and an adjustable over-temperature limit.

Working Principle

The DRV8872DDARQ1 is designed for unipolar or bipolar brushed DC motors and typically operates with 3-4 phases. The main components of the DRV8872DDARQ1 are a high-side switch, a low-side switch, a bootstrap diode, and a controller. The controller manages the switching of the high-side and low-side switches according to the programmed operating parameters in order to drive the motor. It also implements a forward/reverse feature and advanced protection features.

The motor is powered by the voltage source and the high-side and low-side switches flip between high and low. The current runs through the motor in one direction as the switches flip polarity, providing the torque required to move the motor. The controller monitors the voltage and current at the driver’s output, ensuring that it neither exceeds the maximum current limit nor stays below the minimum current limit.

The DRV8872DDARQ1 can be used to control the speed of the motor, power the motor on and off, and track the motor position. It can also be used to implement acceleration and deceleration ramps, dynamic braking, and sinusoidal commutation. The motor can also be put into sleep mode using this motor driver to reduce the power consumption of the device.

Conclusion

The DRV8872DDARQ1 from Texas Instruments is an ideal solution for motor applications that require a wide voltage range and a high amount of drive current. It is suitable for applications such as automotive and robotic applications, industrial automation and motion control, and provides several features that simplify the use of the motor driver. The DRV8872DDARQ1 can be used to control the speed and position of a DC motor, as well as implement acceleration and deceleration ramps and dynamic braking.

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