12 Threads found on edaboard.com: Smps Filter Noise
10khz noise….hummm……that to me sounds like either the ringing of an LC input filter, or from a smps which is operating (rightly or wrongly) in burst mode….and the bursting is at 10khz.
If its an smps What controller do you use?
Of course it could also be due to an unstable feedback loop, but please (...)
Power Electronics :: 03-28-2017 11:30 :: treez :: Replies: 4 :: Views: 208
Hi. "Power Loss = (15V-5V).1A = 10W" Is that a decimal point or a multiplication sign, please? Does your ADC circuit really need 1 amp, or does it need 100 milliamps? The 7805 type are fine at 1W.
You could use several linear regulators, but I think that is wasteful: 15V supply into a 12V regulator into a 9V regulator into the 5V regulat
Analog Circuit Design :: 07-26-2016 10:54 :: d123 :: Replies: 6 :: Views: 255
The drawing is ok, its just that their connection of rbias is doubtful, you really need to have a resistor across the opto diode, because like its connected there in post#2, the rbias will likely not get sufficient current through it when the smps is on full power.
Anyway, the connection configuration OP speaks of is called the “fast lane, s
Power Electronics :: 04-15-2016 15:22 :: treez :: Replies: 6 :: Views: 401
I work for a company making sensitive RF receiver equipment and need to find a suitably quiet 24V 80W+ supply. I could go with a linear supply but my main stumbling blocks there are fitting it in our chassis (82mm high) and having end-user selectable input AC voltage (110/220V is needed). A smps would be preferred if I can make it q
Power Electronics :: 11-02-2012 16:37 :: Colon :: Replies: 1 :: Views: 655
noise is generated from power supply.......
Thanks & Regards
what type psu did you use?
If linear, add diodes of 0.01uF across each diode. if smps, add emi filter at the power input and take output thro' inductors both on Vdd and gnd wires. for distribution of power , use star distribution from the
Professional Hardware and Electronics Design :: 07-24-2012 07:56 :: mvs sarma :: Replies: 15 :: Views: 1118
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but how to fix the problem with the noise and ripple
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this is a 0-100v 0-25a smps but some compnents can't be seen
any idea what they could be
Power Electronics :: 07-04-2012 18:07 :: SSShocked :: Replies: 10 :: Views: 1202
I'm not exactly sure what you mean by "ground noise," but I'm assuming your referring to common mode noise/interference. How such interference is viewed depends greatly on how the smps fits into the overall system (is it isolated, do you have a earth/chassis ground, what are you defining as your reference plane, etc).
With a (...)
Power Electronics :: 05-17-2012 12:03 :: mtwieg :: Replies: 4 :: Views: 1340
The spectrum plot raises doubts, that the shown voltage level is actually generated from the smps, because effectively no discrete lines are visible. It looks rather like amplifier noise or another kind of measurement artefacts. Thus the measurement seems unsuitable to determine a filter dimensioning.
P.S.: Also the shown numbers for (...)
Power Electronics :: 03-20-2011 15:36 :: FvM :: Replies: 14 :: Views: 2517
In an offline smps , would it not be better to put ALL of the EMC filtration ?after? the Mains rectifier (DC side) instead of putting some on the AC side?
I mean, the common mode choke and the X caps should best go on the DC side of the filter?
This smps schematic has a common mode choke and a 330nF EMC capacitor on (...)
Power Electronics :: 10-09-2009 16:26 :: eem2am :: Replies: 10 :: Views: 4813
I am writing about the effect on the loop gain of a capacitor which is placed across the lower feedback divider resistor of an smps. (Either isolated or non-isolated smps).
I worked in one company who made smps?s and they virtually always placed a parallel capacitor across the lower feedback divider resistor in order to get (...)
Analog Circuit Design :: 03-15-2009 12:30 :: eem2am :: Replies: 1 :: Views: 1940
I have designed a flyback smps with 1W output power 5V@1A
When i am applying a load of 250mA , it is generating high frequency noise of abt 200mV peak at 5V output.
I have used 10nF, 100nF ceramic capacitors at output but of no use.
How can i reduce the noise.
Also my transformer makes lot of noise, my feedback loop (...)
Analog Circuit Design :: 11-06-2008 04:23 :: saurav_sdpl :: Replies: 1 :: Views: 1696
Is it posible that the output capacitor of the first SPMPS (12V to 5V) and at the same time as the input capacitor of the 2nd smps (5V to 3.3V)?
Analog Circuit Design :: 10-01-2007 02:57 :: pinoy :: Replies: 3 :: Views: 1259