All Questions
6
questions
2
votes
0
answers
64
views
Phase shift at half the switching frequency of a dc-dc converter
I would like to know if, regardless of the control loop used (Voltage mode control, average current mode control, peak/valley current mode control), there is always a 90-degree phase drop at FSW/2 due ...
- 324
0
votes
0
answers
76
views
DC-DC current mode control frequency behavior
On a buck converter in average current control mode, for example, the inner current loop sees and manages the double pole created by the LC filter, and thanks to this the outer voltage loop is blind ...
- 324
0
votes
2
answers
147
views
Placing an RLC input filter at the input of a buck
Since bucks have current spikes at the input side, it's best to use an input filter as you get better noise reduction than using an output filter (afaik).
Using a regulator IC however, that is, one ...
- 469
0
votes
1
answer
816
views
Relationship between switching frequency and controller's crossover frequency in DC-DC converters
I am reading some answers related to my questions based on control loop stability of SMPS.
I came across this question.
The accepted answer states:
A switch mode power supply is essentially a ...
user220456
1
vote
1
answer
764
views
Frequency Compensation Necessary for a Buck Converter?
I've been tinkering with switch mode power supplies recently and it seems there are various types of buck controller IC's some with a 'COMP' pin for frequency compensation and some without, and I was ...
- 231
15
votes
1
answer
2k
views
Where do the oscillations on the output voltage of my buck converter come from?
I am currently building a buck converter. Its main parameters are the following:
24V input
5V/3A output
Able to sustain large load transient currents caused by the switching of power LEDs (~2A)
I ...
- 163