While the basic LTspice inductor models include parallel capacitance to model self-resonance, Coilcraft leaves this value set to zero because the model does not include a resistor in series with that capacitance. This lack of resistive damping causes simulated narrow spikes that are not present in ...
If we need to switch larger currents, then we’ll need to use a larger transistor, which implies physically larger packages that allow heat to be dissipated more easily. When I discussed bipolar junction transistors (BJTs)in my previous column, my focus was on the lower-power devices intended...
This mini tutorial covers the basics of power supply design by giving an overview of the most common topologies and showing how to use simulation design tools such as LTpowerCAD and LTspice.
However the thing oscillates like crazy when in constant power mode. The switch S1 picks weather the device is in constant power or constant current mode, up is CI, down is CP. C3 and R4 were used to remove the oscillation in CI mode, however I didn't pick those values and I'm not...
” I don’t know, that seems pretty unambiguous. It seems to me that the safety offered by FOSS code is only incrementally greater than that of proprietary. It’s not orders of magnitude. Indeed, you might be worse off if you place trust in FOSS when you shouldn’t. To use a ...
To address the need for small-signal transient and steady state time-domain simulations of our power inductors and chokes, Coilcraft has developed measurement-based impedance models for LTspice. These are included in theCoilcraft LTspice inductor library. The impedance models use fixed value inductance...
Spice model of PMOS power switch (Model drawn in LTspice, Source: Elizabeth Simon) Results of running the SPICE simulation (Source: Elizabeth Simon) As we can see, we started with a part that initially appeared to be overkill, and yet we ended up putting three of them in parallel to sha...