DRV8837DSGT datasheet by Texas Instruments

DRV8837DSGT 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. However, it's recommended to keep it below 12V for reliable operation.
• How do I choose the right 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. Adjust the value based on your specific application requirements.
• What is the purpose of the EN pin, and how do I use it?
  The EN (enable) pin is used to enable or disable the motor driver. When EN is high, the driver is enabled, and when it's low, the driver is disabled. You can use this pin to control the motor driver using a microcontroller or other logic circuit.
• How do I protect the DRV8837 from back-EMF when the motor is coasting or braking?
  To protect the DRV8837 from back-EMF, you can add a freewheeling diode (e.g., 1N4001-1N4007) in parallel with the motor. This diode allows the back-EMF to safely dissipate, preventing damage to the driver.
• What is the maximum motor current that the DRV8837 can handle?
  The DRV8837 can handle a maximum motor current of 1.5A per channel. However, the actual current handling capability depends on the PCB layout, thermal management, and ambient temperature.