This model responds both to direct recombination as well as to reverse voltage sweeping out of carriers. Soft Diode Model for LTspice Right Click and Save As to download The model in the zip file is for the BAR43 Schottky Diode, but also shows the use of temperature dependence of reverse leakage, and fairly well follows the datasheet. Leaky Diode Model for LTspice Right Click and Save As to download You may want to use the alternate solver. Place in \lib\sym\Comparatorsįile:LM339 test.asc Test circuit using the native LM339. Place in \lib\subįile:LM339.asy LM339 component. Note that this thermal averaging effect is what is responsible the arc appearing as a positive resistance at high frequency (the ions stay hot and conductive for a while even if the current goes to zero).įile:LM339.sub LM339 subcircuit. The simplest model for this is to low pass a behavioral source set up with its output proportional to arc power. I would guess that this effect occurs only at damaging levels of current, but that is only a guess.Įnd effects, cathode fall (larger) and anode fall (smaller) tend to be quasi-fixed voltages that don't depend too much on current in the normal operating range.Īrc conductivity depends on ionization, which depends on average power input. However, at some point, the narrow cross section of the CFL tube limits further conductivity modulation, leading to saturation and to the arc voltage increasing rather than decreasing with increasing current (positive resistance). This is why the arc exhibits a negative incremental resistance - increased current leads to a larger diameter arc. As the current increases, heating and ionization builds, leading to a thicker, lower resistance arc. The conductivity of the CFL depends on the level of ionization of the gas in the tube, which in turn depends on the power per unit length of arc. This sort of start does not immediately jump to a high voltage. Q will be limited by the loss in the end electrode heater windings and the resonant inductor. This could take quite a few cycles at the resonant frequency. Thanks a.s.īefore the arc strikes the series resonant circuit is nearly unloaded and, if the arc did not start, would gradually climb in voltage to whatever the open circuit Q of the resonant tank is times the input voltage. In this way, you can have the best of both worlds: You can build up a permanent library of useful parts, immediately accessible when you create a circuit AND you have portability!Įntire Zip file unzip to its own folder(hierarchical example).įiles Below - Click to view as text, Right Click and Save As to download individually.Ī good study of the CFL, and excellent use of good layout technique and use of LTspice. When you share this schematic with others, or use it on a computer that does not have this component, just copy the 'asy' file and its associated SPICE reference to the 'asc' file you are providing to the foreign computer. PLEASE NOTE that using this method to create permanent LTspice models does not prevent this portability! Create your permanent part, or add the parts from the list below. The approach preferred by most is to include the symbols and SPICE models directly in the folder of the schematic you are testing. Many comments are made about the lack of portability of creating these permanent parts in LTspice. Mixed_Part_List (Directory Style - Drill Down)Ī note on portability of these "permanent" LTspice Components: Vendor_List (Directory Style - Drill Down) LTspiceIV-examples (Directory Style - Drill Down) LTspiceIV-library (Directory Style - Drill Down) This entire zip file has been expanded so you can view the contents, and it will be available to search engines. They are available.įor example AD8331 models are Available HERE AD8332 here AD8099 here MC34063 here However, search on the internet for these models. These AEI models were removed because of possible copyright violations. See Screen Shot of files removed from the collection containing AEI SPICE Models The whole library replacement with additions plus tons of examples as one zip file - about 33 MEG. The whole library replacement / addition as one zip file Place in \lib\cmp as a replacement, or carefully extract what you need (Suggested)īrowse or Search on what is in this zip file, and extract what you needīordodynov has kindly shared his entire LTspice folder with tons of parts and examples. 3 A note on portability of these "permanent" LTspice Components:.2 A Large LTspice Folder from Bordodynov.1 An LTspice Standard Library Replacement.
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