Output power from a supply with no neutral
Hello,
I'm developing a proof of concept and I plan to use a packaged power supply like this one (http://www.recom-power.com/pdf/Powerline-AC-DC/RAC01_02-SC.pdf) to generate 100mA @ 3.3Vdc from 230Vac.
For my final product the form factor of the packaged unit is too large therefore I'm developing designs for this part of the product.
I require two variants of the supply (for two separate applications) one will generate the 3.3Vdc from a 230Vac supply with live & neutral conductors with the second generating the output voltage using a live conductor only, no neutral.
I'm particularly struggling with the 'one-live' variant and seeking some guidance and direction on what components would do the job.
Can you offer any thoughts?
Neil
Comments
Yes you can design a power supply using only one Live variant , however depending upon the power your input capacitance will be bigger. You can use our LNK-TN device , download our PIXL's , it will allow you to design a transformer and will suggest the input capacitance, choose rectification as Half bridge as you are using only one line .
Attached the link for LINK-Switch TN Based Design Guide:
Hi,
Thanks for your reply to my question however based on your reply I am not sure I have been clear enough in my original question.
The application I am looking at only has one conductor i.e. a live, or +, conductor. There is no reference conductor i.e. neutral, or -, conductor....I have a single conductor (one live - accepted that my terminology was sketchy).
Having referred to the design guide, and suggestion of a half bridge rectifier - these all require a reference and therefore unless I have mis-interpreted your reply I am not sure if they are applicable in this instance.
What I'm trying to do is produce a reference voltage which will be at a different voltage level from the live conductor which I'll then put through a bridge rectifier to create a DC voltage.
Many thanks again for your help though and I appreciate that I might be asking the impossible...
You don't need to use half bridge, you can still use only one Conductor rectify with single diode to DC Voltage and use flyback or Buck topology to down convert to Low Output Voltage.
i do not get it...
Yes you can design a power supply using only one Live variant , however depending upon the power your input capacitance will be bigger. You can use our LNK-TN device , download our PIXL's , it will allow you to design a transformer and will suggest the input capacitance, choose rectification as Half bridge as you are using only one line .
Attached the link for LINK-Switch TN Based Design Guide:
https://ac-dc.power.com/design-support/product-documents/application-notes/an-37-linkswitch-tn-design-guide/