开云体育

In message <CAK-wn_46VVk4kRHPLiArsHmsDFgdzV=ec+1xnWs1oo86_Q29oA@...>, dated Sun, 25 May 2014, "Sam Jesse revrvr@... [LTspice]" <LTspice@...> writes: You can easily see

Hi In Files/Temp/ transformer.asc Please help me understand why V(Out_1,Out_2) is going to negative numbers, I expected to see it from zero to 40v and back to zero, since plotting V Out_1 looks like a

You hit the nail again, Helmut. Gracias!!

The lack of such information suggests that the transistor might not be a good choice for this use. Jim Wagner Oregon Research Electronics

potrstuvich, The data sheet specifies the gate drive voltage, Rg, Id and Vds. A MOSFET is almost always specified with an inductive load which means the load current is essentially constant during

the mosfet I amusing in LTspice is http://www.mouser.com/ds/2/196/BSC159N10LSF%20Rev2.09-76560.pdf http://www.mouser.com/ds/2/196/BSC159N10LSF%20Rev2.09-76560.pdf BSC159N10. its datasheet gives no

Hello Augustinto, There are two problems in your circuit. 1. The offset adjust circuit only works with a very few hundred milli Volts. See my test circuit. Analog multiplier 03_Vadjtest.asc

You can get some idea of the accuracy by examining the Vgs during the switching interval. If Qg is similar to the datasheet, then Cdg is correctly included. Losses in capacitance will also reflect in

I run across the schematic shown in page 13 of the RC4136's datasheet (uploaded). After 3 days trying to have it "working" in LTSpice (uploaded) I realized I need help. I tend to think I know the

Hello Cristian, The zip-files are in the Yahoo group LTspiceFiles. See the link below. https://groups.yahoo.com/neo/groups/LTspiceFiles/files/LTspice%20Files/

I can not download the file " Zip-files with all files from this group". Any help is welcome . Best regards Cristian

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?