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Tagged with ltspice switch-mode-power-supply
59
questions
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OnSemi NCV1076 Ltspice Model Lib
I am trying to desing a SMPS with LTSpice. There is a driver which ı can use in real.
It is NCV1076.
But ı could not find a .Lib Model to use in LTSpice.
There is a simulation model but it is only for ...
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0
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82
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Positive and Negative Dual Power Supply
I want to build a dual power supply board that works with 12V DC from the power adapter and gives +/-15V at its output. I came across a schematic in LT3094 datasheet on pg 30.
I am trying to simulate ...
- 187
3
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1
answer
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In LTspice, is there any way I can obtain the frequency response of power converter alone?
I am aware of the following methods. But my intention is to understand the behavior of power converter alone, before adding the controller and feedback loop.
FRA analysis: Provides the open loop ...
- 3,032
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1
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80
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Slow simulation on LTspice
What could be the reason for the slow simulation speed for this converter circuit I have emulated from Fig 9-5: https://www.ti.com/lit/ds/symlink/lm5145.pdf?ts=1710376974553
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Simulation time for Full bridge
This is a full bridge circuit which I am trying to simulate in Ltspice with a snubber. When I use ideal switches instead of MOSFETS, the simulation works fine. But when I use the real mosfet models, ...
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2
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1
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How would I create an analog block function in LTSpice?
I'm trying to create a small-signal model of a PSFB converter in LTSpice. The blocks in red are what I am trying to create, essentially a multiplier block which computes various .PARAM parameters that ...
- 73
1
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182
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Flyback converter simulation in LTspice: discrepancy between Switching model and Averaged Switch model
I´m trying to make a Averaged Switch Model of a flyback converter for transient and AC simulation in LTspice. I´m following the document "Advances in Averaged Switch Modeling and Simulation" ...
- 11
3
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What to expect from adjusting the suggested EMI filter and surge protection on a DC/DC power supply's application note. 61000-4-5
I am trying to make the CQB50W12-72S12 120VAC input capable by adding a bridge rectifier into the design that is already called out in the application note (app note and data sheet found here: https://...
user298907
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722
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How to add MOV in LTspice
I am using LTspice for my simulation, in that we are using MOVs and common mode coil so we are trying to do simulation for that. How can we do that? And where can I get the models for MOVs and common ...
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1
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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 ...
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Simulation of motor drive IC in SIMetrix/Simplis
I want to simulate a DC motor driver like MIC4606-1 in SIMetrix/SIMPLIS software. The microchip provided only the SIMetrix model of MIC4606-1( Transient model:
https://www.microchip.com/en-us/software-...
- 1,020
4
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2
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LTspice Frequency Response Analyzer (FRA)
This post is a continuation of this question.
LTspice recently introduced a new feature called frequency response analyzer, see the image below.
The green box shows the symbol for FRA. If you click ...
- 2,593
6
votes
2
answers
974
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How to measure the stability of a buck converter using LTspice
Below is my buck converter circuit. How can I check its stability using LTspice?
I need to measure GM and PM.
Is this true that a 30–60 degrees phase margin and a gain margin of 2–10 dB are desirable ...
- 2,593
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210
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Driving the gate of a MOSFET using an isolated transformer
I am trying to drive a MOSFET using a TL494 IC. The controller IC is separated from the power circuit using a transformer. LTspice is unusually slow while simulating this circuit.
This is my schematic:...
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3
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540
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Simulating resonant LLC converter issues
I'm trying to learn how this topology works to learn about high-power converter design.
I have been following this application note from Infineon, and have been able to reproduce the numbers and ...
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