Other Parts Discussed in Thread: UCC28950
Hi Team,
Our customer is trying to simulate the UCC28730 in Webench but encountered an error. Please see the details of the issue below.
I'm trying to take 575VDC nominal and step it to 50VDC 20A, preferably with a switching circuit.
I should let you know the input voltage could occasionally reach as high as 750V.
I was looking at the UCC28730, and it appears we could use that in our application. I would draw the HV pin to the input voltage via a 39k ohm resistor, so there would be plenty of current to drive two 330-V zener diodes in series, limiting the voltage at the HV pin to 660.
Webench allows me to enter up to 2000V as input for this chip, yet I keep getting the “Design cannot be created! Your preferred device does not work with the inputs you selected.” error when entering my range from 575-750V. What do you think about this possibility?
Specifically, I am working off of the Simplified Application on page 21 of the data sheet.
Regards,
Danilo
