DRV8805DWR datasheet by Texas Instruments

DRV8805DWR 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 50V, but it's recommended to keep it below 40V for reliable operation.
• How do I choose the correct sense resistor value for my application?
  The sense resistor value depends on the desired current limit and the voltage drop across the sense resistor. A good starting point is to use the formula Rsense = 0.5V / Imax, where Imax is the maximum current you want to allow.
• What is the purpose of the EN pin, and how do I use it?
  The EN pin is an active-high enable input that allows you to turn the driver on and off. When EN is high, the driver is enabled, and when EN is low, the driver is disabled. You can use this pin to implement a shutdown or standby mode in your system.
• How do I protect the DRV8805DWR from overcurrent conditions?
  The DRV8805DWR has built-in overcurrent protection, but you can also add external protection components such as fuses or PTC thermistors to provide additional protection. Make sure to follow the recommended layout and thermal design guidelines to ensure reliable operation.
• What is the maximum switching frequency I can use with the DRV8805DWR?
  The DRV8805DWR can operate up to 100 kHz, but the maximum switching frequency depends on the specific application and the inductor value. A good starting point is to use a frequency between 20 kHz to 50 kHz for most applications.