Dear TI
I will use UCC25800 Parts and verify some design conditions.
[my condition]
norminal Vin 24V(14~28V)
Vout for sic gate driver 6W(+18V, -5V)
but web bench don't work my condition.
can you explain example web bench conditions or reference quide?
(i find some example 'Using the UCC25800EVM-037 2-W LLC Converter for Traction Inverter Driver Bias Power Supplies'
but it is 2W Output Power condition. it is smaller than 6W.)
Best regards, Choi
Hi Choi,
It would be useful if you provided the error message from Webench.
I initially tried UCC25800 with your input voltage range. Webench told me input range for UCC25800 must be within +/- 5% of average value (24V). So, I then used 22.8V to 25.2V input, 23V output, and 0.25A (~6W).
Webench then provided the following design (see PDF file). The tool added 1V of headroom to the output. I hope this helps you get started with your UCC25800 design.
Regards,
Eric
Hi again,
I think Webench requires +/- 5% input range to show good output regulation. The circuit will operate above 9V input.
The VCC Turn ON Threshold is typically 8.6V.
Recommended operating range is 9V to 34V.
Eric
