SLUA963B June 2020 – October 2022 UCC21710-Q1 , UCC21732-Q1 , UCC5870-Q1
The shoot through protection (STP) function provides an additional layer of protection from shoot through conditions due to incorrect PWM commands from MCU. The output of the driver uses IN+ and the complementary PWM signal provided to the IN- input to set the output state of the driver, as shown in Figure 3-23. Both the IN+ and IN- inputs are deglitched, which is programmable. Additionally, the output of the driver only goes high once the deglitched IN+ is high and for a programmable dead time after the deglitched IN- is low. If IN+ and IN- are both high at the same time, a shoot-through condition is detected, and is reported to a Status Register and, if unmasked, the nFLT1 output pulls low. The output of the driver is forced to the state defined by a Configuration setting. The STP function is disabled by setting the dead time to be 0 and connecting the IN- input low so the output simply follows IN+.