AC-DC conversion without Neutral
I am struggling to determine if my present design (attached image) can be tweaked to be used with a 208V input. This means NO NEUTRAL! The 208V input would be two 120V line voltages which are 120degrees out of phase. So my questions are:
1) If it is possible, what would I need to do to achieve this?
2) Does operating without a neutral have any impact on the remaining board electronics (not shown) which currently use the neutral as a common ground?
Thanks in advance!
-Jeremy
Comments
The thumnail of the attachment shows up for me to the right of my first paragraph, I wonder what the issue is.
I can drescribe it for you:
Regulator: LNK306
Input: 120VAC Line to Neutral
Output: 6VDC non-isolated from input (neutral used as circuit board ground)
Neutral is currently the common reference for the entire board and so changing to a 208V scheme would use a 120V line as the new common, making troubleshooting and probing very dangerous. But theoretically, would it work?
I have posted this to another forum where the image uplaod did work :http://www.edaboard.com/thread268143.html
Thanks,
Jeremy
Hi,
Seems like you are trying to desing a floating non-isolated buck sitting on 120V. But for testing purpose you have to be careful about the using floating scopes. All your measuing equipment needs to be floating too.
It will work but I would take precautions while testing it.
rgds
OK, thanks for the input!
Hi,
I did not see any images attachement. Please send again.
rgds