In this case, the gate control signal at IN+ is also applied to the RST input to reset the fault latch every switching cycle. Incorrect RST makes output go low. A fault condition, however, the gate driver remains in the latched fault state until the gate control signal changes to the gate-low state and resets the fault latch.

If the gate control signal is a continuous PWM signal, the fault latch is always reset before IN+ goes high again. This configuration protects the IGBT on a cycle-by-cycle basis and automatically resets before the next on cycle.

Figure 10-7 Auto Reset for Noninverting and Inverting Input Configuration