All Questions
Tagged with dc-dc-converter flyback
67
questions
0
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1
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33
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RCD snubber loss in flyback converter
I have few queries in analyzing the curves. Below is the flyback converter with RCD snubber circuit and waveforms.
When the FET is turned ON, there is no primary current flowing through snubber as the ...
- 25
3
votes
2
answers
294
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Correct Implementation of Flyback Diode, TVS Diode, and Snubber Circuit for Buck Converter?
I am fairly new to circuit design. I was wondering if I have correctly implemented the TVS diode (D8), flyback diode (D6) and the snubber circuit (R20 and C41) for this buck converter. I apologize in ...
- 55
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48
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Multiple output DCDC flyback
I am struggling to come up with a viable design with a minimal BOM for a low power DCDC converter and would appreciate some thoughts.
The input is 24v/48v (PoE PD) with multiple output rails: 12v, 5v ,...
- 153
3
votes
1
answer
66
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A question of control of flyback converters
Considering control of flyback converters, is it possible to control a converter which has pure current load (configuration on the picture)? Does it have to always be purely resistive load, because I'...
7
votes
3
answers
552
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How do flyback converters operating in CCM regulate their output?
I'm trying to train up on isolated power converters and magnetics.
I am going through a webinar series created by Electronic Minds out of the UK called Powerful Knowledge. It's on YouTube if you'd ...
0
votes
0
answers
81
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HV output flyback converter voltage spikes reduction
I'm trying to reduce the voltage spikes on the output of a high voltage output (~400 VDC). This output is used to apply a stimulus on a patient to evoke a response, so the output load depends on the ...
0
votes
1
answer
58
views
Fly-buck converter common mode attenuation
I'm designing a "fly-buck" converter, as shown in the example picture below.
For coupled inductor I was planning to use one with 1 kV functional isolation voltage.
This converter needs to be ...
- 2,310
5
votes
5
answers
966
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Is it possible to produce 30W (5V 6A) using a flyback topology without opto-isolation?
The circuit steps the voltage down from POE (class 4) input to 5V 6A
The circuits I have found so far use opto-isolation to regulate the feedback voltage (for 5V 6A). I'm wondering is it feasible to ...
- 127
7
votes
2
answers
800
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What's the purpose of the MOSFET on the output of the flyback buck converter in this circuit?
Below is an EVL8030 for MP8030 POE PD and DC/DC controller. They have put a MOSFET on the secondary winding. At first I thought it was used as a snubber but I'm unsure about this. It's a flyback buck ...
- 127
2
votes
0
answers
107
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DC-DC flyback transformer (SMT)
I am building a flyback DC-DC converter for a school project and am new to soldering and power electronics. I want to prototype the design on a breadboard first, now that I have the design equations ...
- 21
1
vote
1
answer
146
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Is back-EMF an issue in a push-pull converter when both driving transistors are off?
For reference, I am talking about a conventional push-pull converter topology as discussed e.g. in this question.
Wikipedia has the following to say about transistor timing in the push-pull converter (...
- 22.5k
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votes
2
answers
542
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PWM converters: operation over and under 50% duty cycle
I have a DC/DC Flyback converter based on the UC2844 regulator and I would like to use other regulators of the same UCx84x family.
Reading the datasheet, I found that there are regulators that can ...
0
votes
1
answer
369
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A forward converter or flyback converter without voltage spikes?
I was thinking of a way to avoid voltage spikes in a flyback converter and I decided to redirect voltage spikes back to the battery, hence dampening the voltage spikes. Will this method work ...
- 146
4
votes
1
answer
1k
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Why is buck-boost converter showing a different trend than buck and boost in efficiency peaking point?
In general I was under the impression, the efficiency is highest when input and output voltage are close to each other. This holds good for boost (text book image below) and buck (personal experience)....
- 3,032
1
vote
2
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387
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What could cause this flyback output current oscillation?
I designed a dc-dc flyback converter that is expected to reach 30 W output power. But it seems there are problems with reaching maximum power. Firstly I tested without the input filter and with non-...
- 21