hi there all, i have been watching this group for a long time, and i now have a question that i hope some one can help..
I have a piece of equipment that needs a negative 48 volt power supply, dos any one have any idea how i would go about this.
Parts that i have is a transformer 50v 40A not center tap, the secondary only has 2 wires, i have a large asortmant of caps and high voltage diods and high curent diods..
But i am un shore of how to do this, the input to the telco equipment has group, common and -48v.
Thanks in advance..
Jason
I have a piece of equipment that needs a negative 48 volt power supply, dos any one have any idea how i would go about this.
Parts that i have is a transformer 50v 40A not center tap, the secondary only has 2 wires, i have a large asortmant of caps and high voltage diods and high curent diods..
But i am un shore of how to do this, the input to the telco equipment has group, common and -48v.
Thanks in advance..
Jason
Probably best
to use a Texas Instruments TL783 high voltage adjustable regulator -- the transformer you are using will result in an output from the filters which will blow through an LM317HV. If you just require a "negative" voltage the "ground" becomes the positive output of the regulator.
You have to be very careful of grounds etc. when pulling a negative voltage from a positive regulator -- as all isn't as it appears!
See the TI website for details -- www.ti.com
to use a Texas Instruments TL783 high voltage adjustable regulator -- the transformer you are using will result in an output from the filters which will blow through an LM317HV. If you just require a "negative" voltage the "ground" becomes the positive output of the regulator.
You have to be very careful of grounds etc. when pulling a negative voltage from a positive regulator -- as all isn't as it appears!
See the TI website for details -- www.ti.com
the supply dos not need to be regulated.
and i do not know if you would do that easaly ether
as the equipment will draw about 20amps comstaly.
i know you are only going to use 2 diods insted of 4,
but i am not shore where to get the common signal from.
with a full wave bridge there is a + and a -
but with this there is a - where is the common (the other side)
that is where i am having my confusion.
and i do not know if you would do that easaly ether
as the equipment will draw about 20amps comstaly.
i know you are only going to use 2 diods insted of 4,
but i am not shore where to get the common signal from.
with a full wave bridge there is a + and a -
but with this there is a - where is the common (the other side)
that is where i am having my confusion.
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