All Questions
Tagged with buck switch-mode-power-supply
312
questions
0
votes
0
answers
17
views
Buck Average Modelling
I completed average modelling with Voreperian PWM switch model as described in Christophe Basso's book "Transfer Function of Switching Converters" and I compared the average model with ...
- 119
0
votes
1
answer
98
views
Buck Converter Peak Current Mode Control Average Model
I am trying to understand average model of Buck Converter for Peak Current Mode Control Topology.
Below snapshot taken from Christophe Basso Webpage(https://powersimtof.com/Spice.htm) from file "...
- 119
0
votes
0
answers
32
views
Current sensing in DC-DC converter
I studied DC-DC converter in peak/valley/average mode control and I have a question about the methodology to sense the current in average current mode control. I saw lot of paper about DCR sensing but ...
- 324
2
votes
1
answer
77
views
Peak current mode control loop compensation calculations
I recently came across a rather nice straight-to-the-point application note by RickTek (AN028) on how to calculate approximately the compensation network of a PCM buck regulator.
Link : https://www....
- 469
4
votes
4
answers
565
views
Inductor energy storing in buck converter
I am trying to understand inductor energy storing during ON time in buck converter.
Energy stored in inductor of buck converter is (Input Power -Output Power)*Ton
Lets say output power is 5 W and ...
- 119
5
votes
2
answers
285
views
Non inverting buck boost transfer function
When considering the compensation of a non inverting buck boost (single inductor), the datasheet considers to take into account the worst transfer function between the buck transfer function and the ...
- 2,434
15
votes
3
answers
2k
views
Why did my DC/DC Buck Circuit fail?
I'm in the process of debugging a PCB I made. On this board, a 24V input feeds through a DC/DC buck circuit (based around the TI TPS54202DDC) to output 11V, then an LDO to output 9V (to ensure a very ...
- 671
1
vote
1
answer
148
views
Average Modelling of Buck Converter
I am doing Modelling of Buck Converter for LT3890 (Datasheet link attached) for Frequency response analysis .
I have some reference model of Buck converter ,please refer below image
Datasheet Link: ...
- 119
0
votes
2
answers
106
views
Power Converter Average Modelling
This image is from Christophe Basso presentation. It has been mentioned in the slide that average model can predict the transient response but I have one question when we say average model then it ...
- 119
7
votes
2
answers
745
views
How do buck regulator modules with integrated inductors manage to be so small?
This 20 A buck regulator module from TI is 6.5x7.5x4 mm and has an internal 330 nH inductor.
This 6.5x6.5x3.1 mm 330 nH inductor from Coilcraft has an RMS current rating of 18.8 A and is the smallest ...
- 95
0
votes
1
answer
68
views
Schematic review MAX20029ATIAV
I am using a MAX20029ATIAV in my design for powering a Quad Tunneling GMSL2/1 to CSI-2 Deserializer.
MAX20029ATIAV is Quad Low-Voltage Step-Down DC-DC Converters.
My schematic is given below. May I ...
- 2,583
0
votes
0
answers
60
views
Best power supply configuration
I'm making a power supply board with a buck converter for a 2A maximum and I would to know which is the best configuration between these two:
Is it best to put the input filter, a parallel damped LC ...
- 61
3
votes
3
answers
741
views
Input impedance of a buck converter
Is there an approximate formula for calculating the minimum value of the input resistance (or impedance) of a switching regulator? I found several formulas but can't figure out which one to choose. I ...
- 61
0
votes
0
answers
45
views
5 V to 3.3 V buck with limited input current and large capacitor to cover current spikes?
We need to design a power supply for a 3.3 V WiFi-device. But there are quite some current spikes during WiFi startup. Using the design below there is a risk the 5 V (250 mA max) supply (not mine) ...
- 1
0
votes
3
answers
93
views
Does DC-DC 24V-12V waste less power than AC-DC 220V-12V?
I am modifying an existing UPS to allow for a longer backup time. I plan on adding a cooling fan along with an external current controlled power supply to charge the larger batteries. There are some ...
