The problem is that I have to indicate the worst case escenario even if this escenario never be possible in the real world. That's why I wrote Worst case analysis on the subject. I have to do many tests (simulations) to this circuit. Could happen that a worst case escenario of a test, shall have passive components in high temperature but active components at low temperature. What advice could any one give me for this case?
On 04/09/2013, at 9:30 p.m., "sawreyrw" <sawreyrw@...> wrote:
--- In LTspice@..., "j_asoto" <jasoto32@...> wrote:
I have to simulate a complex circuit that have zeners, magnetics, MOSFET, resistors, capacitors and different diodes. the simulation shall be performed at three different temperatures (+25C, -34C, +71C). I already have all the components model at each temperatures, but there is a model of a SCHOTTKY DIODE, that is only at +25C, which is the following:
.MODEL 15ljq100 D(IS=6.15446e-05 RS=0.0153982 N=1.88088 EG=1.3 XTI=3.60437 BV=100 IBV=0.0001 CJO=1.08848e-09 VJ=0.4 M=0.371667 FC=0.5 TT=1e-09 KF=0 AF=1)
These are the questions: In order to have the model behavior on other temperatures (-34C and +71C), which parameters from the model above I have to change? How the parameter are change?(there is a tutorial or formulas that take the temperature as a function of the parameters)?
Thanks
Hello,
The SPICE diode model handles various temperatures without any changes. If you want to simulate you circuit at different temperatures you need to put a .TEMP directive on your schematic. See .TEMP in the help file under Dot Commands.
Rick
[Non-text portions of this message have been removed]
