Hi Sir:
We use UCD9222 and UCD7242 for the CVDD of TMS320C6678. There are two TMS320C6678s on our board,
so rail #1 and rain #2 are all used. Attachment is our configuration file.
When we download the xml file into UCD9222, the output is 1.68V, not 0.9~1.1V for the CVDD of TMS320C6678.
Do you know what is wrong? And what can I do for further debug?
Thank you very much.
.1778.xml.rar
5265.UCD9222_Sch.rar
Attachment are the project file (.xml) and the power schematic for this design.
Need your quick reply, Thank you very much.
I was unable to extract the zipped schematic, there may have been several unsupported characters in the filename.
8662.xml.zip
Put it again. If you can not unzip the file, can you please tell me your email and I send it to you later?
Thank you.
Got it, I'll take a look tomorrow.
I'm curious if there was a particular resolution to this problem? I just received my first UCD9240-based board today. 7 of the 8 voltage rails are regulating as expected. My 3.3V rail only goes as high as 1.6V though.
My issue could be related, or completely different.
Reading these forums some more, I believe the root of my problem may have to do with the fact that I'm trying to regulate 3.3V without a voltage divider on EAp/n. It's a good thing I left an empty resistor footprint on the board!
I will have to try installing a resistor tomorrow.