Hi Pavlin,
Please take a look at the DRV8711EVM and BOOST-DRV8711 for design ideas. These are great resources available online. At the end of the datasheet, additional documentation can be found on tuning the system.
To answer your questions:
Do I have add gate resistors?
In many cases no. The DRV8711 has IDRIVE and TDRIVE registers allowing adjustment of the rise and fall times of the gate voltages. We do recommend that you add a 0 Ohm resistor in the low side gate path. Please refer to section 8.1.2 Optional Series Gate Resistorof the datasheet for details.
I suppose the FAULT pin is open collector so I can connect in parallel many FAULT pins?!
Yes, many FAULT pins can be connected in parallel. The down side to this is that it may be difficult to determine which device issued the fault. The status registers can be read to determine the device and fault detected.
Do I need RESET and SLEEPn pins to be connected to the uController? May I just connect them static to Vcc?!
It is not required to connect the pins to the uController. RESET should be connected to GND while SLEEPn should be connected to 3.3V or 5V. The benefit is reduced power consumption when the device is not active (SLEEPn) and the ability to issue a terminate operation quickly if the controller suspects a problem (RESET and SLEEPn). Without direction connections, the SPI is used to disable the outputs.
Please take a look at the DRV8711EVM and BOOST-DRV8711 for design ideas. These are great resources available online. At the end of the datasheet, additional documentation can be found on tuning the system.
To answer your questions:
Do I have add gate resistors?
In many cases no. The DRV8711 has IDRIVE and TDRIVE registers allowing adjustment of the rise and fall times of the gate voltages. We do recommend that you add a 0 Ohm resistor in the low side gate path. Please refer to section 8.1.2 Optional Series Gate Resistorof the datasheet for details.
I suppose the FAULT pin is open collector so I can connect in parallel many FAULT pins?!
Yes, many FAULT pins can be connected in parallel. The down side to this is that it may be difficult to determine which device issued the fault. The status registers can be read to determine the device and fault detected.
Do I need RESET and SLEEPn pins to be connected to the uController? May I just connect them static to Vcc?!
It is not required to connect the pins to the uController. RESET should be connected to GND while SLEEPn should be connected to 3.3V or 5V. The benefit is reduced power consumption when the device is not active (SLEEPn) and the ability to issue a terminate operation quickly if the controller suspects a problem (RESET and SLEEPn). Without direction connections, the SPI is used to disable the outputs.