Hello,
I need to drive several MOSFETs on lines ranging from 270-530VDC. As these are used for heaters, due to the application, they're expected to operate at 100% duty cycle for minutes.
The connectivity is shown below.
In the image, the MOSFETs are actually driven by, UCC12051 isolated modules, so it's not technically accurate.
This was more practical, but as the number of heaters increased, using a single PSU and dual isolated gate drivers, results in smaller footprint and should only have nanosecond scale delay for activation.
Does UCC21542 have any issue operating MOSFETs as DC switches? As in 100% duty cycle for minutes.
Given the low switching frequency of the system, it should be practically drawing current, equal to the quiescent value of UCC21542 on the isolated side.
Due to availability, it's more practical for me to use 2 UCC12051 in series, to power the UCC21542, or even better 21542A (5V UVLO variant).
Would connecting 3 or 4 UCC21542 be a problem for the PSU, as it's only rated ~100mA at 5V.