SLVSC40H June 2013 – May 2020 DRV8711
PRODUCTION DATA.
In a typical setup, the DRV8711 can support external FETs over 50 nC each. However, this capacity can be lower or higher based on the device operation. For an accurate calculation of FET driving capacity, use the following equation.
Example:
If a DTIME is set to 0 (400 ns), TBLANK is set to 0 (1 µs), and TOFF is set to 0 (500 ns), then the DRV8711 will support Q < 11.5 nC FETs (this is an absolute worst-case scenario with a PWM frequency
approximately 430 kHz).
If a DTIME is set to 0 (400 ns), TBLANK is set to 0 (1 µs), and TOFF is set to 0x14 (10 µs), then the DRV8711 will support Q < 59 nC FETs (PWM frequency approximately 85 kHz).
If a DTIME is set to 0 (400 ns), TBLANK is set to 0 (1 µs), and TOFF is set to 0x60 (48 µs), then the DRV8711 will support Q < 249 nC FETs (PWM frequency approximately 20 kHz).