All Questions
11
questions
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
6
votes
3
answers
2k
views
Buck Converter dies unpredictably upon connecting power
I made a PCB for an ESP32-based solenoid controller that is powered by a 24V DC Jack. I'm using an AP63205 Buck Converter to step that input down to 5V DC, and then a linear 3V3 LDO to power the ESP32....
18
votes
1
answer
17k
views
How important is self-resonant frequency for an inductor when used in a fast (~3MHz) buck SMPS?
I'm using the LM2734Z, a 3 MHz buck regulator. It's really fast which means it has a small inductor.
One of the things I'm wondering is how important is the self-resonant frequency of the inductor? I'...
- 32k
15
votes
4
answers
11k
views
How do I select the correct inductor value for the following buck regulator?
First of all, I suck a bit at math, and I'm no electronics genius, so the stuff I do is for fun and for learning purposes...
I'm working on a buck converter circuit to convert my USB Vbus 5V to 3.3V. ...
- 3,660
12
votes
2
answers
3k
views
Buck converter, squeaking/whining inductor
I have a problem with my homemade buck converter. It is based on a TL494 control chip with my discrete MOSFET driver. The problem is that my inductor squeaks and whines, when the output current ...
- 199
3
votes
1
answer
4k
views
Can a CM choke be used to suppress common mode current in a DC circuit?
I have a setup with a DC/DC converter like in the figure below. I need to minimize common mode current on the supply input.
There are no other connections besides Vsupply + and - and Rload + and -.
...
- 31
3
votes
2
answers
468
views
LT3652 Inductor Selection
First question here
In my system, a LT3652 IC should drive a solar panel with these specifications:
Voc = 9,94V
Vp = 8,54V
Vmp = 7,95V
Isc = 0,90A
Wp = 7,15W
to charge a 3,7v Li-Ion battery at ...
- 135
2
votes
1
answer
3k
views
common mode chokes and their selection
I am trying to select common mode chokes for a board that I am designing. The point of doubt is common mode and differential mode noise filtering and the parameters/values of the components selected.
...
- 1,929
2
votes
4
answers
3k
views
Power MOSFET gets hot while driving Peltier by step-down buck voltage converter
I have a TEC1-12712 Peltier element, which I am driving using Arduino microcontroller through IRFZ44N and buck step down converter (to smooth PWM).
Overall, circuit consists of:
12V, 8.5A max DC ...
- 167
1
vote
3
answers
2k
views
Buck converter based switching power supply?
simulate this circuit – Schematic created using CircuitLab
I have designed this circuit based on a buck converter. I'm just having trouble finding out which values to plug in. I.E. C1, L1, and ...
- 717
1
vote
1
answer
824
views
Inductor and noise due to buck regulator (high frequency)
This is a generic question on the selection of inductors in buck regulators.
The selection of inductors is based on mainly the ripple current and the switching frequency parameters of the buck ...
- 1,929