Power supply/voltage regulator
Power supply/voltage regulator
(OP)
Hi, all
I am trying to find a DC power supply/voltage regulator with high accuracy, for example for 0-10V range, the accuracy need to be several mV. I know one company bk precision with the required accuracy (about 8mV), but I really don't want the "horns and whistles", and want to get the subcomponent. I contacted the company, but didn't have any luck. Does any of you guys have information on this?
Thanks.
I am trying to find a DC power supply/voltage regulator with high accuracy, for example for 0-10V range, the accuracy need to be several mV. I know one company bk precision with the required accuracy (about 8mV), but I really don't want the "horns and whistles", and want to get the subcomponent. I contacted the company, but didn't have any luck. Does any of you guys have information on this?
Thanks.





RE: Power supply/voltage regulator
I don't know if you are referring to bench supply, or an embedded supply or an IC regulator? Please provide more info.
What is it running?
RE: Power supply/voltage regulator
There are bandgap references that can be used as the core of a power supply.
TTFN
RE: Power supply/voltage regulator
My ultimate goal is to find the embedded supply or IC regulator, but at this stage bench supply is acceptable.
RE: Power supply/voltage regulator
Does this need to be variable? If so from what to what?
Is it powering the VCO or just controlling it?
RE: Power supply/voltage regulator
TTFN
RE: Power supply/voltage regulator
RE: Power supply/voltage regulator
RE: Power supply/voltage regulator
Yeah, it needs to be variable, from 0-10V.
It will be used to control the VCO.
RE: Power supply/voltage regulator
Check these out they look like a match.
Nice price, low ripple, nice regulation too.
http://www.web-tronics.com/30serdigrobe.html
RE: Power supply/voltage regulator
http://www.national.com/ds/LM/LM4130.pdf
Note that the voltage noise is 150 MICROvolts p-p
TTFN
RE: Power supply/voltage regulator
Fabulous! Great website, I found one supply that can actually give me 2.8mV regulation!
Thanks a lot
RE: Power supply/voltage regulator
I don't quite understand the bandgap references, I guess they are for temperature compensation? I am more concerned about the regulation accuracy. When I need to fine tune the VCO frequency, I need to have a voltage control to change only several mV.
RE: Power supply/voltage regulator
While the proposed power supply is noisier and less accurate. The power supply link shows ripple at <1 mV, while the bandgap reference has 0.15 mV ripple.
Additionally, the power supply product manual shows a display accuracy to 1%+2 counts, while the bandgap reference can be accurate to 0.05% initially and accurate to 0.65% over a much wider temperature range. Not clear if the power supply is even specified at temperature. Since the power supply display is only 3 digits to start with, the power supply accuracy is at best 0.3V for a 10V output, while the bandgap reference can be accurate to 0.06V for the same 10V output.
Therefore, the bandgap reference is more stable, more accurate and less noisy.
TTFN
RE: Power supply/voltage regulator
RE: Power supply/voltage regulator
I contacted the company, The precision is not that high as described in the specification. The terms "line regulation" and "load regulation" are confusing!
RE: Power supply/voltage regulator
Line Regulation: How the voltage to the regulator effects the regulators output.
Load Regulation: How the current being drawn from the regulator by its load, effects the regulator's output voltage.
RE: Power supply/voltage regulator
why not make a PLL from it ? (i.e. compare the output frequency to the desired one and control the VCO input with the error )
what do you want to use the output fr.?
<nbucska@pcperipherals DOT com> subj: eng-tips
read FAQ240-1032
RE: Power supply/voltage regulator
RE: Power supply/voltage regulator
soure.
What is the frequency range and frequency stability you need?
<nbucska@pcperipherals DOT com> subj: eng-tips
read FAQ240-1032
RE: Power supply/voltage regulator
RE: Power supply/voltage regulator
PLEASE read the FAQ and answer: what is the frequency min,max, and stability you need ?
<nbucska@pcperipherals DOT com> subj: eng-tips
read FAQ240-1032