DRV8830DGQ datasheet by Texas Instruments

DRV8830DGQ Frequently Asked Questions (FAQs)

• What is the maximum voltage that can be applied to the VM pin?
  The maximum voltage that can be applied to the VM pin is 15V, but it's recommended to keep it below 12V for reliable operation.
• How do I choose the correct sense resistor value for my application?
  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.
• What is the purpose of the internal bootstrap diode, and how does it affect the circuit design?
  The internal bootstrap diode is used to generate the gate drive voltage for the high-side FET. It's essential to ensure that the bootstrap capacitor is properly sized and placed close to the DRV8830DGQ to minimize parasitic inductance.
• How do I implement overcurrent protection using the DRV8830DGQ?
  The DRV8830DGQ has a built-in overcurrent protection feature that can be enabled by connecting the OCP pin to a resistor divider network. The resistor values should be chosen to set the desired overcurrent threshold.
• What is the recommended PCB layout and thermal management for the DRV8830DGQ?
  A good PCB layout should ensure that the high-current paths are short and wide, and that the thermal pad is connected to a large copper area for heat dissipation. A thermal interface material can be used to improve heat transfer between the DRV8830DGQ and the PCB.