DRV10975PWPR Integrated Circuits (ICs)

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The DRV10975PWPR is a buck motor driver IC that is part of the Power Management IC (PMIC) Controllers - Motor Drivers product line from Texas Instruments. It is designed to provide power to the motor while still allowing the host system to regulate the motor speed and direction.

Features

The DRV10975PWPR is powered by an input voltage range up to 25 V, and offers both 2-phase (1A) and 3-phase (2A) output support. It includes a variety of features to facilitate fast and easy implementation, such as EMI immunity, adjustable output voltage and current limits, over-current protection, under-voltage detection, and adjustable frequency control. It also features a low-side current sense, which allows for the monitoring of motor current for various applications.

In addition, the DRV10975PWPR is designed for low-EMI operation, providing both fixed frequency switching and adjustable frequency control that is implemented via pulse-width modulation (PWM) input signals. This helps to reduce EMI radiation points, providing improved system performance in noisy environments.

Applications

The DRV10975PWPR is suitable for a variety of kinds of motor driving applications such as DC motors, brushless DC motors, and AC induction motors. Power tools, home appliances, and battery-powered electric tools, such as drills and hand-held blender, are some of the popular applications where this device can find its use.

Working Principle

The DRV10975PWPR implements a buck converter topology with adjustable output voltages and current limits. The buck converter operates by switching the output voltage to charge the inductor with an amount of energy each cycle. The amount of energy stored in the inductor during each cycle determines the output voltage. If more energy is stored the output voltage increases, if less energy is stored the output voltage decreases. The energy is stored during the on-time period of the control signal, and released during the off-time period.

The DRV10975PWPR also features an adjustable frequency and a low-side current sense for monitoring the motor current. This allows for a better system performance and also allows for the desired current limit to be set, to protect both the motor and the device from damage due to over-current conditions.

By maintaining a constant output voltage and by adjusting the on-time period in each cycle ,the DRV10975PWPR is able to regulate the motor speed and direction, allowing the host system to achieve the desired performance. This can be done via the adjustable PWM input signal.

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