All Questions
Tagged with ripple switch-mode-power-supply
22
questions
0
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2
answers
66
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NCP11187 - SMPS Design Issues
I have been working on a SMPS design using the NCP11187. It should output 24V DC nominal with a maximum ripple of no more than 100mV Pk-PK and be able to output up to 50 Watts. I have generally ...
- 1
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1
answer
86
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Switching power supply has high ripple voltage no matter how many capacitors are added
I'm designing a board that uses a Texas Instruments TLV62569DBVR (datasheet here) to convert 5V input from a USB power supply to 3.3 volts to be used to power an ESP32-WROOM-32D-N4. I am having lots ...
- 71
1
vote
1
answer
680
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Flyback converter design using UC3843
I am designing a offline power supply which will 24 V as output with 2.5 A. I found UC3843 as better option. I used TI we bench tool to design my power supply. This is the schematic I got from it. The ...
- 11
1
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1
answer
202
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Removing peaks (noise) in the output of Switch Mode Power Supply
simulate this circuit – Schematic created using CircuitLab
I have a 220/24V SMPS, which I use to power 2 buck convertors in chain. First one 24-12V, and the second one 12-5V. With this setup I ...
- 59
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1
answer
818
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Why is an inductor rather than a capacitor used to smooth switch mode regulators
I understand (at least at a high level) how to use both capacitors and inductors to reduce noise but I don't understand the advantages/disadvantages of each approach or why one is chosen over the ...
- 263
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140
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How to reduce sinusoidal ripple output coming from SMPS?
I have an SMPS producing output of 12V,1Amps. It is giving a voltage ripple (I am not sure if ripple right term for this) as given in image.
I donot have permission to make any changes to this SMPS ...
- 83
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2
answers
3k
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How does the inductor current ripple influence a switch-mode power supply?
I am looking into several DC/DC switching controllers. When talking about component selection, many datasheets and application notes say that inductor ripple should be kept around 20-40% of the ...
- 572
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votes
1
answer
91
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Flyback 120-240VAC to 3.3VDC ripple and simulation
I'm working on a project requiring a 3.3VDC and eventually a 12VDC. The input voltage could be either 120VAC or 240VAC 60Hz.
I've found and replicated the design PMP10143 proposed by Texas Instrument ...
- 243
1
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0
answers
85
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What could be the reason if the AC coupling option goes away when I attach a differential probe (P6248) to a Tek MSO5204 scope?
When the scope is not attached, I could see both AC coupling and DC coupling options for the channel settings. The moment I attach the differential probe, the AC coupling option goes away. Any reason?...
- 3,032
2
votes
1
answer
2k
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Flyback output ripple voltage formula
Does anyone is able to demonstrate this formula?
Where Co is the output capacitance, Rc is the ESR associated to the capacitors, Io is the output current of the particular output, fs is the switching ...
- 2,434
1
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0
answers
80
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Design of a boost converter with large variation in output current and low output ripple
I'm working on the design of a 24V to 30V boost converter that needs to have an output ripple of less than 100 mV with an output current between 0 and 2 A.
The output is used to power a controller for ...
- 31
-1
votes
2
answers
490
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Output voltage ripple considerations
I'm working on a full bridge DC-DV converter, following the instructions on power supply cookbook.
It has a 350 V output, 2 kW total power, and a 30 kHz switching frequency. I chose a 5% inductor ...
- 319
1
vote
3
answers
1k
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SMPS Input/Output ripple current and ripple voltage
I found a presentation regarding SMPS and found this slide.
I am not totally able to grasp the concept of the input and output ripple current.
In the above image I have the following questions :
I ...
user220456
1
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1
answer
3k
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Pi filter design for SMPS output ripple
Given a circuit like a buck-converter like the AOZ1284PI in a circuit such as this one:
Or push-pull converters such as this one:
If one was to design at the output a low-pass PI filter with a ...
- 469
0
votes
2
answers
1k
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Does polarity of scope probe matter when measuring ripple of the power supply module?
Measuring ripple of 28V/12V power supply module across +/- output pins. Does the probe tip have to be placed at +pin and probe gnd to -pin, or it can be reversed?
Having inverted readings when ...
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