The FLT pin is open drain and can report a fault signal to the DSP/MCU when a fault is detected through the DESAT pin. The FLT pin is pulled down to GND after a fault is detected, and is held low until a reset signal is received from RST/EN. The device has a fault mute time t_FLTMUTE, within which the device ignores any reset signal.

The RST/EN pin is pulled down internally and is thus disabled by default when this pin is floating. It must be pulled up externally to enable the driver. The pin has two purposes:

• To enable and shut down the device. If the RST/EN pin is pulled low for longer than t_INFIL, the driver is disabled and OUTN is driven high to activate the pull down NMOS to turn off the gate of the IGBT or SiC MOSFET.
• To reset the DESAT fault signaled on the FLT pin. If the RST/EN pin is pulled low for more than t_RSTFIL after the mute time t_FLTMUTE, then the fault signal is reset and FLT returns to a high impedance state upon the next rising edge applied to the RST/EN pin. A timing diagram is shown in Figure 6-9.