All Questions
20 questions
4
votes
4
answers
625
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
0
votes
2
answers
189
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
0
votes
1
answer
159
views
AP63203 Buck not working
Recently I have been experimenting with the AP63203, and I just have not been able to get it to output 3.3V successfully. Currently, the way I have been testing it is using an SMT to TH adapter, which ...
- 1
0
votes
0
answers
35
views
PMIC MIC23451 operating voltage range
I am using Microchip SOM module in my project. Not using all the things in the SOM.
So we are redesigning the board with necessary components for my application.
Below is block diagram shows the main ...
- 3,061
2
votes
1
answer
167
views
Output Capacitor Design for a Multiphase Buck Converter
According to this application note from Texas Instruments, in the design of the output filter for a multiphase buck converter there are basically two ways of choosing the output capacitor. The first ...
0
votes
1
answer
86
views
Power stage of a buck converter as VCCS
In a buck converter using current-mode control as control loop, why can the power stage be seen as a voltage-controlled current source? Is it possible to understand that from a simple equation?
- 341
5
votes
1
answer
308
views
Art of Electronics - buck converter ripple current derivation
I'm struggling to understand how this buck converter equation in The Art of Electronics can be true.
Page 642 shows this Buck Converter:
and then these graphs of current and voltage are also provided
...
- 165
1
vote
3
answers
319
views
Buck converter simulation Vout lower than expected
I am trying to design a simple buck converter in LTSpice. Here are my parameters:
...
- 21
0
votes
1
answer
87
views
Buck converter: Additional circuitry working not clear
Saw the below schematic of a buck converter, but not able to figure out the working of the marked section. It is shown Node 1 is at 16 V.
Looks like sensing the differential voltage across inductor, ...
- 3,156
2
votes
0
answers
101
views
Is it true that power supply design is difficult when input voltage range is wider?
During power supply (buck converter) testing, I had seen the lowest efficiency values corresponding to highest input voltage. I thought if the design meets this worst case scenario, it should be ok no ...
- 3,156
2
votes
3
answers
2k
views
Buck Converter Inductor current at Steady State
I am trying to learn about Buck converters from the below page.
https://www.allaboutcircuits.com/technical-articles/analysis-of-four-dc-dc-converters-in-equilibrium/
Below line is confusing me ...
- 3,061
2
votes
1
answer
816
views
Practical vs. theoretical buck converter
I am currently looking at open loop buck converters. I am running it with the following:
Switching frequency (f) = 62500
Inductance (L) = 100e-6
Input voltage (Vi) = 5
Output current (Io) = 0.06
...
- 451
4
votes
1
answer
967
views
Why 2 diodes in parallel buck converter design?
I have been looking up dc-dc buck converter designs and have question regarding the diodes.
It says "5A High current Schottky diode" is it common in buck converter design to parallel ...
- 137
0
votes
1
answer
47
views
Buck converter output power definition
I'm designing a buck converter to feed the following loads:
A control circuit 3.3V/100mA
A 80V solenoid which has a DC resistance of 300 ohms. This means a current of ~270 mA.
My plan is to ...
user115094
2
votes
3
answers
326
views
Why do some switching regulator ICs have single VCC pin but multiple PGND pins?
This is a follow up question to Reason of multiple GND and VCC on an IC
I found a switching regulator IC (buck) that has multiple PGND pins and one analog ground (AGND). It has only one VCC pin.
(...
- 3,156
1
vote
1
answer
146
views
LTC1775 Buck converter component question
I am trying to design a 12v,10A buck converter using a with LTC1775 and have gone through the calculations assuming a 40% inductor ripple current and a switching frequency of 150kHz. This gave an ...
- 15
0
votes
2
answers
894
views
Altering switching power supply schematic to generate 5v instead of 3.3v at 5A
Im fairly new to this level of more complex circuit design so forgive me if I sound like a newb.
I'm creating a DC/DC Step down buck regulator using the LM22678 switcher from texas instruments: http:...
- 83
0
votes
2
answers
710
views
How do I increase 3A fixed output current of a buck converter? [closed]
Basically I am making a solar inverter without any battery or charge controller that will directly convert the dc output coming from solar panels (6 connected in parallel) into 220V AC.I am using ...
4
votes
1
answer
373
views
Design considerations for low-current SMPS application
I've got a project I'm working on that is powered by a single Lithium-Ion battery (let's say design range is 2.5V to 4.2V), and a nRF52832-based MCU. I've decided to design a power topology that goes ...
- 6,456
1
vote
1
answer
837
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 ...
- 1,937