hi all
a couple of customers tried using Webench for the following design:
Vin = 12V nominal, range 10-14V
Vout = 52V
Current out = 600mA
Operating frequency - 550kHz.
They picked up the TPS4306x and assembled the bom as for webench indication.
The prototypes they assembled didn't work at all, despite the simulaton and so on...
We already fixed the problem w/ customers and just wanted to infrom you to update/imporve webench designer.
It seems that webench doesn't consider the derating of the ceramic cap due to the DC-Bias.
It is sufficient to compare some reference designs that meet the spec above to see that the output cap is simply too small (at least after a quick look, more investigation is required).
KR
Vincenzo
