The DRV8702D-Q1 FET support is based on the charge-pump capacity and PWM-output frequency. For a quick calculation of FET driving capacity, use Equation 3 when drive and brake (slow decay) are the primary modes of operation.
The internal current chopping frequency is at most equal to the PWM frequency as shown in Equation 4.
For example, if the VM voltage of a system is 7 V (IVCP = 8 mA) and uses a maximum PWM frequency of 40 kHz, then the DRV8702D-Q1 device will support FETs with a Qg up to 200 nC.
If the application requires a forced fast decay (or alternating between drive and reverse drive), use Equation 5 to calculate the maximum FET driving capacity.