DRV8343-Q1: The difference among the min typ max value of IDRIVEP

Hi Arrow,

Thanks for posting to the MD forum! 

IDRIVEP and IDRIVEN are the source and sink gate currents, respectively. Gate drive current, or IDRIVE, is a configurable setting that allows for slew rate control of the external MOSFETs. When customers switch their FETs, you have a trade-off between:

- Switching the FET fast, resulting in less Rdson power losses but worse EMI performance

- Switching the FET slow, resulting in better EMI performance but more Rdson power losses

Therefore, IDRIVE allows the user to control how much gate current is used to turn on or off the MOSFET. We recommend using a gate drive setting that does not turn/off on the MOSFET too fast (100-200 ns) so that you don't stress the MOSFETs and cause damage to the power stage or driver. You can calculate the best IDRIVE setting from your MOSFETs Qgd value through this resource: https://e2e.ti.com/support/motor-drivers/f/motor-drivers-forum/796378/faq-selecting-the-best-idrive-setting-and-why-this-is-essential

For more information on IDRIVE, check out our Smart Gate Drive app note: https://www.ti.com/lit/pdf/slva714d

To determine motor switching consistency, ensure that you don't exceed any abs max specifications of positive transients on the HS drain (VDRAIN), negative transients on SLx, and your switch node is the way you how decide you want it to be based on the trade-offs listed above. 

Thanks,
Aaron