DRV8802QPWPRQ1 datasheet by Texas Instruments

DRV8802QPWPRQ1 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 30V 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 limit.
• 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 DRV8802 from back-EMF when using inductive loads?
  To protect the DRV8802 from back-EMF, you can add a freewheeling diode in parallel with the inductive load. This diode provides a path for the current to flow when the load is turned off, preventing the voltage from spiking and damaging the driver.
• What is the maximum switching frequency I can use with the DRV8802?
  The DRV8802 can operate up to 100 kHz, but the maximum switching frequency depends on the specific application and the load characteristics. It's recommended to keep the switching frequency below 50 kHz for most applications.