Recent content by Ntip

Ok so was looking at IEEE articles on this and should've spent the day switching instead. For a simpler explanation than reading research papers, I found this reference. https://gansystems.com/wp-content/uploads/2018/01/91096_GaNSystems__GN001_Design_with_GaN_EHEMT_Rev3_20161007.pdf

It looks like that plot shows Rds for turnon voltage so I can see that going to +5 Vgv on gives lower Vgs than say 3.5 V but I don't see a plot or anything discussing turnoff voltage which is negative...(-4 V) at the lowest.

I am interested in using GaN MOSFETS for my circuit and I'm looking at the EPC2012C. I'll attach the datasheet here. I noticed that it calls for a -4 Vgs. If my driver only goes to 0 V, will this cause a problem? What is the benefit in driving negative if it's not required?

Thanks for the feedback everyone. Just the comments so far has given me a lot to look into. It looks like I have a steep learning curve ahead of me.

yes, you are correct. The bus voltage is generated by a SMPS. Here is a simple sketch of the system.

I am starting the input filter design for a converter and only have the voltage and power specs. It will be the input filter to other converters on a parallel bus, so I could look at the datasheets for those and get some specs there. I do not have any information from the input converter to this...

DavE, it was a comment that Baluncore made in one of the replies. I was wondering if it specifically introduced a RHP zero or created other stability challenges in a switched capacitor circuit since it was specifically mentioned. It looks like the transfer function for these can get pretty messy...

2) the dielectric strength is part of what I was hoping someone may have some experience with. I know that dielectrics degrade more rapidly as the frequency increases. I guess the maximum voltage is rated for DC on these. The high dv/dt and PWM-like excitation is part of what led me to question...

Yes, the capacitors will not be reverse biased or have AC. I will be using film so that shouldn't be a problem anyway, I was really just hoping to find out if there were more things I should consider in a switched capacitor circuit due to the high dv/dt. Why does the ESR only need to be...

Here are two simple schematic of switched capacitor circuits. Basically, the capacitors are connected in different series/parallel configurations to transfer charge from one capacitor to the next and create a higher voltage on the output (most of the time). During steady state, the capacitors...

I am looking at capacitor selection for a switched capacitor converter and I'm not sure which voltage rating to look for. I've was going to consider the DC rating since they're holding off a DC voltage, but they are subject to PWM excitation since they're switching between nodes at different...

So since an isotropic radiation field is uniform in the radial direction you can ignore the direction and that makes it a scalar field? It seems like it should be a vector field to me because the direction is in the radial direction. I'll go back and read more on this but I just haven't wrapped...

I am looking at antenna theory and just came upon scalar fields. I found an site giving an example of a scalar field as measuring the temperature in a pan on a stove with a small layer of water. The temperature away from the heat source will be cooler than near it but it doesn't have a...

Ok so yes in additional to the conductor geometries being the same, separation is also the same which is what would allow M12=M21=M23=... So let's say these are all parallel conductors with alternating current direction, Leq would normally be Leq=L/n where n is the number of conductors...

Yes, I understand that the induced voltage is reversed which is what leads to a negative coupling (-M). What I'm saying is that in the case of 2 conductors in the case of subtractive mutual inductance, it makes sense that the equivalent inductance is 2L-2M or n(L+M) for n=2. But if you have 4...