All Questions
Tagged with ltspice dc-dc-converter
39
questions
3
votes
1
answer
80
views
Voltage drop issues in LTspice simulation for buck converter using SW model
I have a LTspice design issue where I encounter the same problem, even when I use other available simulations.
Whenever I increase the load, there is a significant drop in voltage, despite having ...
- 532
2
votes
1
answer
152
views
Is it possible to include a behavioural source in an LTspice sub-circuit for use in a buck converter model?
I'm in the process of modelling a buck converter following the approach in Sam Ben-Yaakov's A unified SPICE compatible average model of PWM converters article in which he models a switched inductor ...
- 137
0
votes
0
answers
188
views
How to simulate GaN (Gallium Nitride) Mosfet circuits on Simulink?
I am doing a research on GaN devices and comparision of their performances in DC DC converters as compared to Si devices. The issue that I am facing is that I can't find a way to simulate them on ...
- 1
3
votes
2
answers
532
views
Buck Converter Compensation and Transient Response
I am trying to compensate a buck converter. I've set up an averaged model of a buck converter in LTSpice.
Here is a picture of the simulation. The B3 voltage takes into account the gain from using a 5 ...
- 101
2
votes
1
answer
78
views
LC-converter non sinosoidal currents and voltages
I simulated a LC-converter with a verly low static switching frequency of 300 Hz. I expected the current in C1 and L2 in a sinosoidal shape but instead it is almost a square wave. Also there is a ...
- 147
0
votes
0
answers
38
views
Three-stage boost converter improvements [duplicate]
Here is a three-stage boost converter that I simulated in LTSpice.
I am getting the high voltage output that I desire (1.3 kV). Before I proceed to the design phase, I would like to discuss a few ...
- 536
0
votes
1
answer
136
views
Three-stage boost converter + Improvements
EDIT
As mentioned in the comments, a realistic load for me would be from 1 kΩ to 100 kΩ. I also was using damping resistors at each stage but it was pointed out to me that they are not needed, so here ...
- 536
5
votes
1
answer
371
views
Buck converter only works properly when I increase the gate voltage
I'm currently trying to simulate a buck converter but it doesn't work like it should and I don't know why.
It should decrease the voltage from 20 V to 14 V, but I only get a few volts at the output. ...
- 53
2
votes
1
answer
109
views
Model skyworks si3404 DC DC converter in spice from basic diagram (can it be modeled)
I have a DC DC converter that I'd like to model, I am not a super expert in DC DC converter design (never took the class). The manufacturer provides little to none information on using the chip in a ...
- 85k
2
votes
1
answer
117
views
Current through MOSFET of ideal forward converter
I am asked to sketch the current through the MOSFET of an ideal forward converter. I simulated a forward converter in LTspice and found that when the MOSFET was on, the MOSFET current and input ...
- 4,145
2
votes
2
answers
584
views
DC/DC Converter not outputting the correct voltage
I have the following circuit for the LT3463A regulator:
https://www.analog.com/media/en/technical-documentation/data-sheets/3463f.pdf
I started testing the board, for the negative voltage I was ...
- 379
2
votes
0
answers
936
views
Checking calculation of phase and gain margin in LtSpice
I am currently studying DCDC stability analysis in LtSpice. Could you please check my phase margin calculation, am I right? And how about the gain margin calculation? Is it equal to infinity in my ...
1
vote
1
answer
881
views
LTspice giving weird results in simulation of phase shifted full bridge converter
I am trying to simulate a phase shifted full bridge converter in LTspice. I had already simulated it in MATLAB Simulink and obtained the desired results, but I am redoing it in LTspice to include the ...
2
votes
1
answer
433
views
How to reduce output voltage ripple in a buck converter?
This is a buck converter. It has some rippleon the output voltage.
How can I reduce the ripple?
- 143
0
votes
1
answer
341
views
Simulation of boost converter using SiC MOSFET in LTspice
I am trying to simulate boost converter using SiC MOSFET (MOSFET MODEL = G2R1000MT17D). The boost converter specifications are:
Vin = 200 V
Vout = 400 V
Fsw = 150 kHz
When simulating the above ...
- 15