6
votes
Accepted
Zener instead of resistor divider on dc-dc converter feedback pin
The zener changes the nature of the feedback signal. It is the result of a subtraction rather than a division. This enlarges output errors as seen by the FB input.
To see how, consider this. If ...
- 21.4k
6
votes
Accepted
5
votes
Accepted
How does MPPT maintain a constant voltage?
MPPT is not a specific "algorithm", it's a concept.
When you pull more current from a solar panel, the panel voltage drops; if you pull too much current, the voltage collapses and you get ...
- 474
5
votes
How does MPPT maintain a constant voltage?
As with any regulator the output voltage can be made stable/fixed/constant with varying input voltages. The diagrams are just so simple that they do not show the presence of feedback, so the output ...
- 159k
3
votes
Accepted
Level shift a digital 1.8V signal to split supply rail, using BJT
One tiny (2.2 x 2.2 mm) SOT363 IC DCX114YU from DIODES will solve this:
simulate this circuit – Schematic created using CircuitLab
- 7,307
3
votes
How does MPPT maintain a constant voltage?
The power converter shown in the MPPT is known as a buck/boost converter; this is a type of DC-DC converter that can produce an output voltage that is either lower (buck) or higher (boost) than the ...
- 5,327
3
votes
How does MPPT maintain a constant voltage?
An MPPT can only track the maximum power point if the load can swallow the power, regardless of how much. Usually, you're either charging batteries or feeding the grid. In that case, the load is in ...
- 4,867
3
votes
Does this DC-DC converter model require an external switching signal?
Please read the datasheet for this device.
The "SW" pin connects to the switching inductor. The datasheet provides this information, along with all the other information needed to use this ...
- 24k
2
votes
Accepted
RCD snubber loss in flyback converter
In ics waveform below, that is current in snubber cap is -Vcs/Rs.
Since the diode is reverse biased how does this current appear?
You should read the article more carefully: -
...
- 465k
2
votes
Accepted
DC-DC SEPIC convertor design
This only makes sense when looking at the copper pour, not at the schematic. The point of this is to keep the power ground isolated from the regular ground, so that the pour areas are only connected ...
- 21.2k
2
votes
Accepted
DC-DC convertor-SEPIC architecture
The resistor is there so that you can slow down the turn-on of the FET if you want to, by changing the value from zero to something else. The turn off would be faster since the diode would conduct on ...
- 24.1k
2
votes
How does MPPT maintain a constant voltage?
Your first figure has a flaw.
It's lacking the input capacitors of the DC-DC converter.
Those are massively important.
Let's assume that the L is so big that the current is approximately constant, i.e....
- 1,762
2
votes
Does this DC-DC converter model require an external switching signal?
The SW node is a power output, not a signal input. It's the node that gets switched by the switching transistors and/or diode. It's where you attach the inductor and, if applicable, the bootstrap ...
- 35.2k
2
votes
Accepted
Maximizing power transfer from 50Hz AC line via toroidal current transformer
Minimum line current 50A means we need to drop maximum 20V to deliver 1kW. I assume we have no way of looping a wire around (power lines are generally solid wire, coated with rigid insulation, and ...
- 39.6k
1
vote
Accepted
Filter on SEPIC architecture output for making +/- 60 V from 11 V input
I see you've already accepted an answer, but there's a detail missing.
the positive voltage is fed back to the feedback pin. Assuming proper regulation, this will never exceed the feedback voltage of ...
- 153
1
vote
Filter on SEPIC architecture output for making +/- 60 V from 11 V input
I want to know what is the role of R4 and R10 in this circuit?
They are there to provide a light load when no real load is connected. If you didn't have these resistors and you disconnected your load,...
- 465k
1
vote
Accepted
Constant output voltage in buck-boost converters
I've tried to understand why the voltage across the inductor is constant. I think it is thanks to the generator to which the inductor is connected in parallel, and which provides constant voltage, so ...
- 17k
1
vote
Current spike through bootstrap circuitry during turn-on and off of HS FET (GaN FET half bridge dc-dc)
Yes, these are typical issues in bootstrap circuits, when loose layouts and fast switching are involved.
8nH is wild large for GaN; with DFN types, that should be down in the <5nH range for the ...
- 39.6k
1
vote
Accepted
DC-DC converter design simulation tools and Webench design tools to identify the best-suited IC and schematic
These tools, are nothing more than that: tools. They can offer suggestions (sometimes even complete designs!), but there will never be a substitute for using your noggin'.
Particularly for the wide ...
- 39.6k
1
vote
DC DC boost giving high voltage , minimum quiescent current
This circuit works well.
It's not pretty, but it works superbly.
You could adapt the shown regulator to suit your own system, or could create a simpler one based on the same principle.
Example only: A ...
- 151k
Only top scored, non community-wiki answers of a minimum length are eligible