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A few days ago, 'hitec92407' uploaded the file "LM2917Test.zip" to the group's Temp area. Through my mistake, the discussion ended up on the [LTspiceFiles] group rather than this one. hitec92407's

potstuvich, I don't think it's a question of how accurate is LTspice, but instead, how good is the transistor model? If I really wanted to know the answer to this, I would build a switching time test

I would expect it to be modestly accurate, then. Jim Wagner

I am using the mosfet model of a mosfet provided by LTspice itself. So will the switching losses be accurate? The inductor in the real circuit will not saturate at the peak fet current level. Gate

Should have written, instead of "losses will be mostly resistive" it ought to be "inductor losses will be mostly resistive" since gate charge losses CAN be significant. Jim Wagner Oregon Research

Those voltage dependent FET capacitances are modeled well, if a good model is supplied, For an external FET switcher, that is up to you. The switching loss estimate is as good as your model. For

Hello, LTspice calculates a switching loss of 1.07W in the FET of the buckboost smps that I have uploaded to the Temp Files area. "Buckboost SMPS _switching loss.asc". How accurate is this to the real

Hell Stephen, I just tried with your mentioned setting and it works. Plot Settings -> Sync horizontal axis Best regards, Helmut

Tip: Ferrite cores are identified by an Al number, which allows quick determination of the number of turns, using the formula L=Al.N?

pha0001 asked: "why did you take a quarter of the total primary inductance? Why not just half it?" Adding to what Vlad already wrote (which should lead you to your answer), it does depend on the

What's the equality between the ratios of the inductances and the number of turns? Vlad ______________________ ltspicegoodies.ltwiki.org -- holding, among others: a universal analog/digital filter,

Thank you so much!!! Things are starting to become much clearer now. If you don't mind, may I ask, why did you take a quarter of the total primary inductance? Why not just half it?

Hi Helmut, It's actually the X-axis I have trouble with - see "X-Axis different scales.jpg" in Temp. Regards Stephen. PS Mike told me (quote) "lock horizontal axis should do that."

Hi Helmut It's really the X-axis I'm having problems with - see "X-Axis different scales" in Temp. Top: Initial plot Middle: Set precise manual limits on time range Lower: Only one plot pane is

Quite a mess, as expected :) Thank you Andy, I think I have it clear now.

I was looking for an electronic "dash pot" for a solenoid and found the TI DRV10{2, 3} series of delayed-start PWM devices.? Downloaded TI's DRV103 spice file, looked, did a few sort-of educated

Thank you for the advice, Helmut.

I also tried .meas ampx MAX V(Out_1) I(V1) thinking I can plot the max of V(Out_1) vs. I(V1) I tried to do it by adding another directive .meas ampx MIN I(V1) for no avail. Any suggestions is most

Helmut Is there a way to optimize on 2 or 3 variables and plot results like you did? i.e. Ton Tperiod R of the inductor for example? Thank you LTspice@...> wrote:

Hello Sam, I have additionally uploaded your example with MEASURE to the Temp-folder. transformer2_meas.asc Best regards, Helmut