DRV8812PWPR

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PMIC - Motor Drivers, Controllers

Motors are essential elements in a wide range of devices and applications, from robotics to automobiles, and range in size and complexity from miniature brushless DC motor to large complex servo motors. Motors require an external controller device or driver to control the current and voltage characteristics and to enable their operation. Such devices require electrical power management, and the use of power management integrated circuits (PMICs) to provide the necessary power control and regulation.

The DRV8812PWPR is one such PMIC, designed to provide efficient and reliable operation of a single stepper motor. It is a dual-channel motor controller with flexible features such as automatic current scaling, sleep mode and restart function. It also supports both unipolar and bipolar stepping motors for a wide range of applications. The device is also capable of working with a range of input voltage from 4.1 V to 20 V.

Application Field

The DRV8812PWPR can be used in a variety of applications, including robotics, printers, home appliances and other automated technologies. In robotics, it can be used to control, activate and power small motors, allowing for more precise and detailed movements. In printers, it can be used to drive and manage the print head, resulting in improved performance and accuracy. In appliances, the DRV8812PWPR can control the motors of washing machines and refrigerators, enabling more precise and efficient operation. Additionally, it can be used in automated door and window shutters for enhanced security.

Working Principle

The DRV8812PWPR is based on a dual H-bridge cell architecture, made up of one MOSFET in each of the two high and low sides. The H-bridge configuration provides a full range of motion, enabling forward and reverse motion of the motor, as well as a ‘stop’ state, where the motor is held in a specific condition. The motor is powered by a DC supply voltage, applied through the H-bridge and is then regulated by the circuit’s internal logic and control. This results in the current flow being regulated based on the input voltage, resulting in a smoother motor operation.

The DRV8812PWPR is capable of automatically scaling the motor current to provide more efficient performance, even at minimal input voltages. Additionally, the device can be configured to use one of the two currently configured channels for reversed movement. It also features an active clamping mechanism to limit peak current, as well as a sleep mode for energy saving.

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