The maximum current rating of the DRV8718 is 3.5A per phase, but it can be limited by the PCB design, thermal considerations, and the type of motor being driven.
The sense resistor value depends on the motor current and the desired current sense accuracy. A general guideline is to choose a sense resistor value that results in a voltage drop of around 50-100mV at the maximum motor current.
The internal voltage regulator provides a regulated 5V output that can be used to power external circuitry. It can be enabled by connecting the VREG_EN pin to a logic high signal. The output voltage can be used to power sensors, microcontrollers, or other devices.
The DRV8718 has a built-in overcurrent protection feature that can be enabled by connecting the OCP_EN pin to a logic high signal. The device will then limit the motor current to a predetermined value (set by the OCP_TH pin) to prevent damage from excessive currents.
The fault pin is an open-drain output that indicates when a fault condition occurs, such as overcurrent, overtemperature, or undervoltage. The fault pin can be connected to a microcontroller or other device to trigger an interrupt or take other action in response to a fault condition.
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DRV8718SQRVJRQ1 Overview
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