All Questions
13
questions
0
votes
1
answer
172
views
Audible Noise in MC34063-Based Buck/Boost Converter Circuit
I am trying to make a hotplate with an ESP32 and I use MC34063 for buck/boost converters. The hotplate itself require 12-30V to operate and the ESP32 and LEDs need 3.3V.
Here is the circuit:
When the ...
- 355
4
votes
2
answers
897
views
What is this ringing in the inductor current?
I am working on a buck-boost converter and I see this ringing in the inductor current. It happens on turn on of the high side FET (See attached Image). First of all is this ringing normal?
Is there ...
1
vote
1
answer
428
views
Coupled inductors for multi-output buck
I see coupled inductors are generally used in multi-phase design to take advantage of current ripple cancellation.
What is really the advantage of coupled inductor in multi-output buck or multi-output ...
- 3,032
1
vote
1
answer
510
views
How to reduce inductor heating in buck converter?
I am designing a simple buck converter to drive 9 V, 3 A LED. Supply can vary between 20 and 30 V. I used the TI Power Designer Tool to calculate the inductance value and other parameters. Here is the ...
- 83
2
votes
3
answers
164
views
Buck Converter Theory Confusion
For a buck converter, I'm having a hard time conceptually understanding what is happening.
Here's my thought process: When the switch is closed, their is a positive voltage across the inductor equal ...
- 393
0
votes
2
answers
504
views
Why am I getting a sinewave output from a buck converter with an input of square wave?
I was expecting the output to stay at 1V which is the average value of (2V, 1MHz, 50%) input.
It seems the capacitor is slowly charging to the input peak, and the inductor current is changing based on ...
- 1,150
6
votes
1
answer
856
views
What are the issues with using multiple inductors for a DC/DC converter?
I'm going to be designing a Buck Converter that will supply a max of 10A of current to an LED Strip (9V to 20V in, 5V out). Since I want to minimize the amount of EMI in the circuit, I want to use ...
- 1,195
5
votes
2
answers
1k
views
Where does the inductor energy go in a buck converter when the load is suddenly disconnected?
It is known that inductors resist a change in current. So, my question is that in a buck converter, what prevents the output voltage from going all the way up due to inductor resisting a current ...
- 109
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....
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
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
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