DRV8805DW datasheet by Texas Instruments

DRV8805DW 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. However, it's recommended to keep it below 40V for reliable operation.
• How do I adjust the current limit on the DRV8805DW?
  The current limit on the DRV8805DW can be adjusted by changing the value of the sense resistor (Rs) connected between the IS pin and ground. A smaller Rs value will result in a higher current limit.
• 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 driver. When EN is high, the driver is enabled, and when EN is low, the driver is disabled. This pin can be used to implement a shutdown or standby mode in the system.
• How do I protect the DRV8805DW from back-EMF when using inductive loads?
  To protect the DRV8805DW from back-EMF when using inductive loads, a freewheeling diode (D1) should be connected in parallel with the load. This diode provides a path for the back-EMF current to flow when the driver is turned off.
• What is the maximum switching frequency of the DRV8805DW?
  The maximum switching frequency of the DRV8805DW is 100 kHz. However, the actual switching frequency may be limited by the load and the system requirements.