DRV8834PWPR datasheet by Texas Instruments

DRV8834PWPR 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 40V, but it's recommended to keep it below 35V 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 good starting point is to use the formula Rsense = 0.05 / Imax, where Imax is the maximum motor current. Then, adjust the value based on the desired current sense accuracy and the motor's characteristics.
• What is the purpose of the nSLEEP pin, and how do I use it?
  The nSLEEP pin is an active-low input that puts the device into a low-power sleep mode when driven low. This can be used to reduce power consumption when the motor is not in use. To use it, simply drive the pin low when the motor is not needed, and drive it high when the motor needs to be active.
• How do I configure the device for half-bridge or full-bridge operation?
  The DRV8834PWPR can be configured for half-bridge or full-bridge operation by connecting the appropriate pins. For half-bridge operation, connect the OUT1 and OUT2 pins together, and use the IN1 and IN2 pins to control the high-side and low-side FETs. For full-bridge operation, use the OUT1 and OUT2 pins separately to control the high-side and low-side FETs.
• What is the purpose of the VREF pin, and how do I use it?
  The VREF pin is an internal voltage reference that can be used to set the current sense threshold. By connecting a resistor divider from the VM pin to the VREF pin, you can set the current sense threshold to a specific value. This allows you to adjust the overcurrent protection threshold to suit your application.