All Questions
23
questions
7
votes
2
answers
748
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
2
votes
3
answers
135
views
High voltage buck converter inductor voltage rating
We‘re designing a buck converter that should convert 600VDC down to 20V. For that purpose we use the ST VIPer26k.
We’re currently looking for an inductor (L2). The inductance is 1mH, but we‘re not ...
- 378
1
vote
1
answer
429
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
489
views
How do I stop buck converter voltage from dropping whenever current increases?
I built this buck converter circuit using the LM2596T-5 (5 V OUTPUT, 12 V INPUT) using the exact components mentioned in the datasheet's first page (schematic below), except for the diode.
I used the ...
- 633
0
votes
3
answers
379
views
Multi-phase buck converter inductor selection
This question is regarding the inductor design (uncoupled) in a multiphase buck converter.
In a multiphase converter, the inductance per phase requirement is higher than the corresponding single phase ...
- 3,032
0
votes
0
answers
184
views
Glitches in inductor current waveform
I am using this DC-DC buck converter.
Schematics :
Buck converter specifications :
Input voltage - 18V to 32V
Switching frequency - 300kHz
Output voltage 9V
Load current - 0mA to 200mA maximum.
...
user220456
1
vote
1
answer
836
views
In Buck Converter, when the ESR and EPR of Inductor increases then what is the its effect on output voltages and why?
I have done LTSpice simulation. I have seen that by increasing ESR of inductor, the output voltages decreases and by increasing EPR of inductor the output voltages and ripple in output current and ...
- 23
0
votes
1
answer
185
views
Buck Converter - Closed Loop - Effect of decreasing inductance and increasing capacitance
Output voltage as a function of output current is plotted from oscilloscope data for a closed loop buck converter.
Switching frequency is kept the same in both the cases.
CASE 1 : Inductance = 2....
- 13
1
vote
2
answers
2k
views
How do I understand the effect when the load current is over the inductor's saturation current?
Got a question about the effect after the current over the saturation current in a buck DC-DC regulator.
I'm thinking of a theory that due to the fact that the inductance will be downgraded if Isat ...
- 681
0
votes
1
answer
157
views
Multi-phase Buck Converter - Does the inductor breakdown during the startup transient?
In a multi-phase buck converter, when and how does the inductor breakdown?
Lets say the multi-phase buck converter has the following parameters:
V_in = 50V, V_out = 25V, P_in = 225W (so max amps = ...
- 121
2
votes
2
answers
117
views
LC circuit of buck converter in nRF8001 datasheet
In the datasheet of the nRF8001, they specify in the reference schematic (page 51) the LC circuit to use with the integrated DC/DC converter (see below).
Why is there a small inductor L5 in series ...
- 121
1
vote
4
answers
906
views
Measure indcutor ripple current in a SMPS
I need to measure the ripple current in a buck converter. In general, I add leads to the inductor and use a current probe. My issue now is that the inductor I am using has such a low inductance that ...
- 314
2
votes
3
answers
976
views
Core loss appearing in buck converter ripple current
I have been told (and have also seen experimentally) that an inductor with a high core loss will introduce "glitches" to the ripple current in a switch mode power supply. I have tried researching this,...
- 314
-1
votes
1
answer
500
views
Synchronous Buck in possible DCM operation?
I'm currently testing a buck converter I designed but I was running into some issues with it.
Vin = Solar Panel (30W, 17V at Vmax, 1.76A,Imax)
Vout = 12V battery
Inductor = 150uH
(Switching frequency=...
- 79
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