DRV8703DQRHBTQ1

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Power management integrated circuits (PMICs) are integrated circuits that manage power for all components of a system, ensuring energy efficiency and reliable performance. PMICs such as DRV8703DQRHBTQ1 are designed to control and manage the power in systems that require precise performance and can drive multiple types of motors. This article will discuss the application field and working principle of the DRV8703DQRHBTQ1.

Application Field

The DRV8703DQRHBTQ1 is a fully-integrated motor driver solution designed to drive three-phase Brushless DC (BLDC) motors, permanent magnet synchronous motors (PMSMs), and stepper motors in end applications such as audio speakers and pumps. The device is optimized for driving BLDC motors because of its integrated H-bridge and other circuitry. The device consists of an H-bridge, current sense resistors, and integrated power and current monitoring. It operates from 5-V to 20-V DC power supplies, operating at a maximum PWM frequency of 10 MHz.

The DRV8703DQRHBTQ1 requires no external PWM controller, as it contains its own 3-level SVPWM controller that is designed to minimize switching losses. The device supports LON or CAN communications interfaces, and has configurable inputs for Hall and encoder sensors for closed-loop control applications. It also supports three-step current contro.

Working Principle

The DRV8703DQRHBTQ1 uses a technique called “PWM chopping” to control the voltage applied to the motor. In this technique, an input signal with a certain frequency is divided into regularly spaced time slots. Depending on the input level of the signal, the device will either apply a low, medium, or high voltage to the motor for that time slot, thereby controlling its speed and torque. The device contains a PWM controller that ensures the correct ratio between the high and low voltage, providing the appropriate amount of average voltage to the motor.

The device also contains current sense inputs that sense the load current of the motor. This information is then processed by the onboard algorithms and is used to adjust the PWM outputs to maintain a constant current in the system. This current control mechanism ensures a stable torque profile, allowing the system to maintain a desired level of speed and motion.

In addition, the device contains a set of Hall inputs that sense the position of the motor’s rotor. The position information from the Hall inputs is then combined with the speed information from the current sense inputs in order to control the motor in a closed-loop fashion. This feedback loop ensures accurate control of the motor and precision operation of the system.

The DRV8703DQRHBTQ1 is a highly integrated device that provides a cost-effective solution for motor control applications. It is capable of driving three-phase BLDC motors, PMSMs, and stepper motors, and is optimized for BLDC motor control. It also supports current control, PWM chopping, and closed-loop control, making it suitable for use in precision motion control applications.

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