Dear TI experts,
we are currently evaluating a UCC5870-Q1 gate driver IC in combination with SiC MOSFET.
Our goal is to monitor the voltage of the gate of the mosfet as close as possible to the real device due to safety reasons.
During evaluation the following questions come up:
1.) Please confirm, that Vgth Monitor can only be run in Config Mode and not in Active Mode. Thus Vgth measuring can’t be done with active load.
2.) Document slyp764 from TI website shows a gate voltage monitoring circuit on page 29 which senses the gate voltage of the power switch after the external gate resistors directly at the power switch.
Unfortunately we can’t find any description of this voltage monitoring inside the datasheet SLUSD86C. Figure 7-31 only shows a circuit with voltage sensed before the gate resistors.
Can you please provide some additional information?
For example: Which pin is used for gate voltage monitoring? Which software configuration has to be used? Which role does Vbst plays?
3.) Is the functionality behind SM24 and SM25 from SLUA883 (03/2020) identical to figure 7-31 from datasheet?
Maybe the connections in SLUA883 are false connected?
Thank you in advance & Kind regards
Andreas Storbeck