Castle - Make A Special Edition Monster

[Pdelcast]

Originally Posted by lutach

Will the LFPAK work better in a higher voltage controller?

I don't mean to say that the LFPAK isn't a good package - - it is one of the better ones on the market. It's just that all of the testing we have done has showed that it is inferior to the SO8-FL package, and the LFPAK doesn't have a price advantage (in fact it is usually more expensive) over the SO8-FL.

Look at Infineon's "Super-SO8", On Semi's "SO8-FlatLead", Fairchild's "Power 56", or Siliconix' "PowerPAK SO-8" package. They are all essentially the same package, are reasonably priced, and perform very very well.

[lutach]

Originally Posted by Pdelcast

I don't mean to say that the LFPAK isn't a good package - - it is one of the better ones on the market. It's just that all of the testing we have done has showed that it is inferior to the SO8-FL package, and the LFPAK doesn't have a price advantage (in fact it is usually more expensive) over the SO8-FL.

Look at Infineon's "Super-SO8", On Semi's "SO8-FlatLead", Fairchild's "Power 56", or Siliconix' "PowerPAK SO-8" package. They are all essentially the same package, are reasonably priced, and perform very very well.

How well would a bunch of "Siliconix's PowerPAK 1212-8 Package" MOSFET (Keep in mind, being able to drive a lot of them) do in a ESC designed for car that can do 12S lipos? I'll bet you can fit a lot of them in a controller similar to the HV. Is there anyway you can treat us RC-Monster followers to a mother of all controllers "RC-Monster Edition"? I know you play with a lot of designs. I can't imagine you just build the products we see in you website. You probably have a 12S controller now that can handle spikes of 200A that you are playing with and not telling us.

[Pdelcast]

Originally Posted by lutach

How well would a bunch of "Siliconix's PowerPAK 1212-8 Package" MOSFET (Keep in mind, being able to drive a lot of them) do in a ESC designed for car that can do 12S lipos? I'll bet you can fit a lot of them in a controller similar to the HV. Is there anyway you can treat us RC-Monster followers to a mother of all controllers "RC-Monster Edition"? I know you play with a lot of designs. I can't imagine you just build the products we see in you website. You probably have a 12S controller now that can handle spikes of 200A that you are playing with and not telling us.

Why the 1212-8 package? The footprint to silicon ratio is better on the larger Powerpak FETs...

I am playing with a version of the Monster that is stackable, and can use 30, 40 or 60V FETs. I already said that earlier...

[BrianG]

Originally Posted by Pdelcast

...I am playing with a version of the Monster that is stackable, and can use 30, 40 or 60V FETs. I already said that earlier...

I want a double stacked version using 60v FETs please. And leave out the UBEC.

[lutach]

Originally Posted by Pdelcast

Why the 1212-8 package? The footprint to silicon ratio is better on the larger Powerpak FETs...

I am playing with a version of the Monster that is stackable, and can use 30, 40 or 60V FETs. I already said that earlier...

I just had an idea that the more FETs would be better? The 1212-8 is roughly half the size of the larger PowerPak and I keep thinking the more the better as each FET will work less to produce the same power as less FETs. I know I'm not an engineer and what we think off might be possible in our heads, but not in true life application. But since you are working on the stackable Monster, when will the HV one be available? Will you be having other guys put the controller to the test or will it just be team drivers?

[Pdelcast]

Originally Posted by lutach

I just had an idea that the more FETs would be better? The 1212-8 is roughly half the size of the larger PowerPak and I keep thinking the more the better as each FET will work less to produce the same power as less FETs. I know I'm not an engineer and what we think off might be possible in our heads, but not in true life application. But since you are working on the stackable Monster, when will the HV one be available? Will you be having other guys put the controller to the test or will it just be team drivers?

I gotcha -- what we really look for during design is the silicon (or RDSon) to footprint ratio. So if you calculate milliohms / mm^2, you can compare silicon ratio pretty directly from FET to FET. Right now it's pretty tough to beat the 5x6mm leadless packages for up to 100V.

I haven't completed the layout of the control board yet -- I'm using a 72V maximum input switching BEC for the HV version of the board -- But I'll make it so that an external BEC can be used (Brian!)

[lutach]

Originally Posted by Pdelcast

I gotcha -- what we really look for during design is the silicon (or RDSon) to footprint ratio. So if you calculate milliohms / mm^2, you can compare silicon ratio pretty directly from FET to FET. Right now it's pretty tough to beat the 5x6mm leadless packages for up to 100V.

I haven't completed the layout of the control board yet -- I'm using a 72V maximum input switching BEC for the HV version of the board -- But I'll make it so that an external BEC can be used (Brian!)

Ok, so basically being able to switch all the FETs, it would be possible to get a lot of FETs in a PCB that is a little larger then what the Monster Max uses. So a ESC that can go as high as 400A is possible to keep things of the safe side if one wants to use a Neu 1527/1D, 2215/1Y, 2230/1Y or a Lehner 3080-5. Patrick, I would put a high priority on such a controller . We are hungry for it.

[Pdelcast]

Originally Posted by lutach

Ok, so basically being able to switch all the FETs, it would be possible to get a lot of FETs in a PCB that is a little larger then what the Monster Max uses. So a ESC that can go as high as 400A is possible to keep things of the safe side if one wants to use a Neu 1527/1D, 2215/1Y, 2230/1Y or a Lehner 3080-5. Patrick, I would put a high priority on such a controller . We are hungry for it.

Well, the design I'm working on now should handle any of those motors with ease. Versions with 60 and 120 FETs will be first.

It won't be "moderately priced" like the MMM.