Quote:
Originally Posted by Pdelcast
I've found that LFPAKs are inferior to the SO8-FL package (flat lead, leadless SO-8 -- or PowerPAK SO-8 depending on who makes it) because they still have wire bonds on the source leads, where the SO8-FL has copper clips. The SO8-FL package also dissipates heat much better than the LFPAK, which is kind of a half SO-8, half DPAK package.
The DPAK doesn't take as large a die as either the LFPAK or the SO8-FL, and it has about 2 milliohms of package resistance -- making it not very well suited for 30V applications.
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Will the LFPAK work better in a higher voltage controller? I do own a controller that uses 30V LFPAK MOSFETs, rated for 6S lipos and it works pretty well. It didn't get hot at all for the 5 minutes I used it. I was impressed by that as the heat sink on it looks really crappy. If you made a HV car controller that looks like the HV and SHV controllers using the LFPAK MOSFETs would that work? I like the way the HV controller looks and I have my HV110 that I still need to send in if you need a guinea pig. I know the LFPAK have some 75V MOSFET and that could even make a possible 16S controller.
Now for my other question I posted before.
Being able to drive all the MOSFETs (keep this in mind), would a controller with 240 MOSFETs total or 80 per phase, but 40 in the H bridge config. work less to make the same amount of power as one with less MOSFETs?
Now, this controller don't need to be all that small. Something that is smaller then the Schulze 40.160 will do
. I know more FETs and other components will add to the cost, but that's only if parts are being bought from Digi Key, Mouser and any other catalog distributors so lets keep that on the side for now. I'm just trying to get a rock solid controller. I even went as far as contacting and sending 1500 MOSFETs to a company in China to make me a 15S car controller and they never did one so you know the problems they are facing. All they make is Airplane and Helicopter controllers. I know they are using the Atmel's ATMEGA8L-16AU MCU and some car controllers that I have uses the same MCU. My guess is they are still having trouble with the software.