All Questions
Tagged with buck power-supply
223
questions
1
vote
3
answers
2k
views
DC-DC Step-Down (buck) converter 5V 10A 50watt, not understand how to size the supply
I have a 5V 10A 50WATT DC step-down converter: http://www.powerstream.com/dc-24V-5V.htm
I'm just not understanding how to size the power supply needed to drive this converter at max power.
I have an ...
- 171
5
votes
3
answers
2k
views
Can I use digital pots for my feedback resistors to a buck-boost regulator?
I'm working on a design, and this will be my first attempt at a buck-boost regulator.
I need the output to be variable because my application calls for different voltages under certain conditions.
...
- 12k
5
votes
3
answers
4k
views
What is the most efficient way to power a solar computer (5V) from a 12V lead acid battery?
My project: Power a Beaglebone Black (BBB) entirely from solar energy. Obviously energy efficiency is crucial here. My setup so far: PV panel connected to a deep-cycle lead acid battery. Now I need to ...
- 151
5
votes
2
answers
1k
views
Switching regulator layout advice
I am planning to use a Diodes AP5100 switching regulator to go from ~22V to 12V in my circuit, which will have a max current draw of about 1A. This is my first attempt at laying out a switching power ...
- 250
12
votes
2
answers
3k
views
Routing a buck/boost DC/DC converter
I need some help with the layout of a power supply. I botched the first two iterations as I do not have the necessary experience, and I would like to avoid another costly run.
For the sake of ...
- 435
14
votes
1
answer
3k
views
Noise problem with buck/boost switching regulator
I am designing a electrical device for a research project (I'm a PhD student, but unfortunately not EE!). More info on the device can be found at http://iridia.ulb.ac.be/supp/IridiaSupp2012-002/
The ...
- 435
4
votes
2
answers
413
views
buck converter for high current LED
My first question here:
I want to make a simple adjustable current supply for some LEDs I have (approx 3 V and up to 3 amps). I've decided against just using a single FET to control current as it ...
- 247
3
votes
2
answers
1k
views
DC-DC Buck Regulator: Embedded or External MOSFET
What are benefits and drawbacks of using Buck Regulator with external MOSFET compared to Buck with embedded MOSFET? Is there some general rule?
In my case I need 5V 3A from 9V-30V supply.
- 258
0
votes
4
answers
4k
views
Enable pin current limiting resistor?
I was looking at the AOZ1280CI DC-DC buck converter, and I'm having trouble properly interpreting the datasheet concerning the enable pin.
In the pinout description, it states:
Enable pin. The ...
- 16.8k
7
votes
2
answers
887
views
Is there a reason to use smps regulators over modules
I'm just discovering that TI have switch mode power modules as well as regulators. For example they have the LMZ12001 which would be significantly easier to use than the TPS62150 regulator.
Elektor ...
- 2,588
2
votes
1
answer
2k
views
A basic buck converter circuit to power 3W LEDs from PC power supply?
I'm just finishing up my first electronics course (edx.org), and I want to build some LED grow lights for starting seedlings in the winter. I have high power LEDs, like this one here, and I have a PC ...
- 1,035
2
votes
2
answers
3k
views
Does Inductor saturation current play an effect in SMPS design?
I am currently designing a DC-DC Buck power supply and now that I have chosen values for all my resistors and capacitors, I am looking for actual components. I was wondering if the saturation current ...
- 751
19
votes
6
answers
14k
views
Why do buck (step-down) switching regulators require an inductor and diode?
So, I understand, at least at a basic level, the method of operation of switching converters, both buck and boost. What puzzles me, though, is why buck converters in particular aren't simpler.
Why ...
- 7,749